{"title":"Downfire Subwoofer Box and Enclosures","description":"\u003cdiv class=\"ai-collection-block\"\u003e\n\n\u003ch2\u003eWhy Down-Firing\u003c\/h2\u003e\n\u003cp\u003eDown-firing does two things a rearward-firing box cannot. It puts the vehicle floor directly in front of the cone, which loads the driver and spreads bass more evenly through the cabin instead of arriving from one point in the trunk. And it puts the cone face down, where cargo, boots and dog crates cannot reach it.\u003c\/p\u003e\n\u003cp\u003eThe tradeoff is that the orientation has to be designed in. The baffle sits on the bottom face, the terminal cup moves to a side wall, the internal wiring routes to match, and the cabinet needs feet to hold the cone clear of the floor. A front-firing box turned upside down is not a down-firing box.\u003c\/p\u003e\n\n\u003ch3\u003eDown fire vs rear fire vs side fire\u003c\/h3\u003e\n\u003cp\u003eRear-firing aims the cone at the trunk. Side-firing aims into a wheel well, and mostly exists because it fits where nothing else will. Down-firing aims at the floor, the one surface every vehicle has in the same place. What changes at the seat is direction, not output. The floor redistributes what the driver already produces. It does not add power. Full comparison: \u003ca href=\"\/blogs\/car-subwoofer-enclosures\/down-firing-vs-front-firing-subwoofer\"\u003edown-firing vs front-firing\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat the orientation asks of the install\u003c\/h3\u003e\n\u003cp\u003eTwo objections get raised about down-firing and both are fair. The first is mechanical. A driver at full excursion pushes back on the cabinet with the same force it uses to move air, and a down-firing cabinet routes that reaction into the floor through four feet instead of into a trunk wall. On a bare plastic cargo floor an unsecured box will buzz, and it will walk. Strap it to the cargo tie-downs. If the floor pan itself is what resonates, that is a floor pan problem and no enclosure fixes it.\u003c\/p\u003e\n\u003cp\u003eThe second is carpet. That concern comes from home audio, where a cabinet sits on short spikes and deep household pile genuinely chokes the gap. Automotive carpet and trunk liner are a fraction of that depth, and the ABS feet here set 1.75 inches, so factory carpet does not restrict it. What matters is that all four feet land on something solid and level. Half on a folded seat back and half on the floor is the real failure case.\u003c\/p\u003e\n\n\u003ch2\u003eWhen Down-Firing Is the Right Choice\u003c\/h2\u003e\n\n\u003ch3\u003eCargo-bay installs\u003c\/h3\u003e\n\u003cp\u003eSUV and hatchback builds where the box lives in the cargo area and things get stacked on top of it. This is the case down-firing exists for.\u003c\/p\u003e\n\n\u003ch3\u003eUnder-seat installs\u003c\/h3\u003e\n\u003cp\u003eTrucks and SUVs with usable under-seat space. The driver fires through the gap between the cabinet base and the floor, with the seat structure clearing the top.\u003c\/p\u003e\n\n\u003ch3\u003eOpen cabins\u003c\/h3\u003e\n\u003cp\u003eJeeps, Broncos and older SUVs where the cargo area opens straight into the passenger compartment and there is no closed trunk to load the back wave.\u003c\/p\u003e\n\n\u003ch3\u003eStealth builds\u003c\/h3\u003e\n\u003cp\u003eFrom above a down-firing cabinet reads as a flat bench. No visible cone, no visible baffle.\u003c\/p\u003e\n\n\u003ch2\u003eThe Lineup at a Glance\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eUniversal cutout, $169 to $180.\u003c\/strong\u003e Two boxes, single 10 and single 12, cut to a standard cutout and volume range rather than one driver. Pick these when the driver is undecided or already in hand and not on the matched list.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDriver-matched singles, $220 to $260.\u003c\/strong\u003e The bulk of the range. Internal volume and cutout cut to one driver's published parameters, across Alpine, Arc Audio, Diamond Audio, Focal, Hertz, JL Audio, Kicker, Morel, Prodigy, ResoNix, Rockford Fosgate and Wavtech. These are \u003ca href=\"https:\/\/audiointensity.com\/collections\/proline-x-performance-optimized-series\"\u003ePerformance Optimized Series\u003c\/a\u003e builds. \u003ca href=\"https:\/\/audiointensity.com\/collections\/proline-x-micro-series\"\u003eMicro Series\u003c\/a\u003e cabinets sit alongside them, cut shallower for tight floor-to-seat clearance, and every Micro ships with feet so it runs down fire or forward fire.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDriver-matched duals, $270 to $300.\u003c\/strong\u003e Same construction, two drivers, isolated chambers. Sealed alignment means one individual chamber per driver, and the quoted volume is per chamber, not the total.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLarger and vehicle-specific, $330 to $500.\u003c\/strong\u003e A triple 10 for Wavtech thinPRO10, \u003ca href=\"https:\/\/audiointensity.com\/collections\/15-inch-subwoofers\"\u003e15 inch\u003c\/a\u003e builds in both Micro and Performance Optimized including a dual 15, a Performance Optimized cabinet for the ResoNix GUS-15 and and the direct-fit \u003ca href=\"https:\/\/audiointensity.com\/collections\/ford-bronco-subwoofer-box\"\u003eBronco Edition\u003c\/a\u003e dual 12. The Bronco cabinet runs isolated chambers, one per driver, the same as every other sealed build here.\u003c\/p\u003e\n\u003cp\u003eBrowse the full lineup below, or work the other direction and start from the driver: \u003ca href=\"https:\/\/audiointensity.com\/collections\/10-inch-subwoofers\"\u003e10 inch subwoofers\u003c\/a\u003e, \u003ca href=\"https:\/\/audiointensity.com\/collections\/12-inch-subwoofers\"\u003e12 inch subwoofers\u003c\/a\u003e, and \u003ca href=\"https:\/\/audiointensity.com\/collections\/shallow-mount-subwoofer\"\u003eshallow mount subwoofers\u003c\/a\u003e for tight floor-to-seat clearance.\u003c\/p\u003e\n\n\u003ch2\u003eHow These Are Built\u003c\/h2\u003e\n\u003cp\u003eEvery cabinet is cut from Langboard Elite MDF, 48.5 lb\/ft³ density and 200 psi internal bond, on ShopSabre routers in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003cp\u003eJoinery follows the series. Performance and Performance Optimized builds use V-groove and dado joints that mechanically interlock at each panel intersection before bonding. The Professional Series 15 inch build adds a double-layer baffle and threaded inserts matched to the driver's bolt pattern. The Vehicle Specific Bronco enclosure is stack-fab with dowel reinforcement, which is how every Vehicle Specific cabinet is built.\u003c\/p\u003e\n\u003cp\u003eSealed builds ship with polyfill sized to the cabinet volume. Wiring is 12 gauge OFC, pre-run and landed at the Proline X ABS and carbon fiber composite terminal cup with copper ring terminals. ABS feet are included and are not optional: they hold the cabinet 1.75 inches off the floor, and that gap is the clearance the cone needs to move without contacting the surface below.\u003c\/p\u003e\n\u003cp\u003eFinishes are grey trunkliner or black plush carpet.\u003c\/p\u003e\n\n\u003caside class=\"ai-callout-spec\"\u003e\n\u003cp class=\"ai-callout-label\"\u003eQuick Reference: Picking an Orientation\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ai-spec-key\"\u003eThings stack on the box:\u003c\/span\u003e down fire\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ai-spec-key\"\u003eOpen cargo-to-cabin layout:\u003c\/span\u003e down fire\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ai-spec-key\"\u003eClosed sedan trunk:\u003c\/span\u003e \u003ca href=\"https:\/\/audiointensity.com\/collections\/sealed-subwoofer-boxes\"\u003erear-firing sealed\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ai-spec-key\"\u003eBehind the seat, no floor space:\u003c\/span\u003e \u003ca href=\"https:\/\/audiointensity.com\/collections\/vehicle-specific-subwoofer-enclosure\"\u003evehicle specific\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ai-spec-key\"\u003eWant it to arrive assembled:\u003c\/span\u003e \u003ca href=\"https:\/\/audiointensity.com\/collections\/loaded-subwoofer-boxes\"\u003eloaded\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/aside\u003e\n\n\u003cp\u003eDown fire is one of several orientations we cut. The full range sits on the \u003ca href=\"https:\/\/audiointensity.com\/collections\/subwoofer-box\"\u003esubwoofer enclosure hub\u003c\/a\u003e, and if you still need the driver itself, start at \u003ca href=\"https:\/\/audiointensity.com\/collections\/car-subwoofers\"\u003ecar subwoofers\u003c\/a\u003e or match power at \u003ca href=\"https:\/\/audiointensity.com\/collections\/car-amplifiers\"\u003ecar amplifiers\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003caside class=\"ai-callout-cta\"\u003e\n\u003cp class=\"ai-callout-label\"\u003eNeed Help With Your Down-Fire Build?\u003c\/p\u003e\n\u003cp\u003eTalk to an SQ-judge tech directly. We will confirm whether down-firing suits your install location and match the enclosure to your driver.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ai-contact-phone\"\u003e931-563-5151\u003c\/span\u003e\u003cspan class=\"ai-contact-divider\"\u003e|\u003c\/span\u003e\u003cspan class=\"ai-contact-email\"\u003econtact@audiointensity.com\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/aside\u003e\n\n\u003cdiv class=\"ai-faq-section\"\u003e\n\u003ch2\u003eFrequently Asked Down Fire Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat's the advantage of a down-firing enclosure?\u003c\/h3\u003e\n\u003cp\u003eTwo things. The vehicle floor acts as a boundary that loads the driver and spreads bass more evenly through the cabin, so the output is less directional than a box firing into a trunk. And the cone faces down, protected from cargo, foot traffic and impact. For a cargo area that gets used daily, down-firing is usually the more practical orientation.\u003c\/p\u003e\n\n\u003ch3\u003eCan I just flip a regular subwoofer enclosure upside down?\u003c\/h3\u003e\n\u003cp\u003eNo. The cabinet needs feet to hold the cone clear of the floor, 1.75 inches of it here, the terminal cup has to sit on a side wall instead of the back, and the wiring has to route to match. A front-firing box inverted puts the cone on the carpet and the terminals against the floor. These cabinets are built for the orientation from the first cut.\u003c\/p\u003e\n\n\u003ch3\u003eWill a down-firing enclosure work in any vehicle?\u003c\/h3\u003e\n\u003cp\u003eIt needs a reasonably flat surface to sit on. SUVs, hatchbacks, and trucks with cargo bays or behind-seat floor space are the typical applications, and carpeted sedan trunks work fine. It is the wrong choice for irregular surfaces, deep wheel-well intrusions, or anywhere the enclosure has to mount to a vertical wall.\u003c\/p\u003e\n\n\u003ch3\u003eHow much clearance do I need below the enclosure?\u003c\/h3\u003e\n\u003cp\u003eThe included ABS feet set it at 1.75 inches and you do not need to add anything further. The driver fires through that gap. Factory carpet and trunk liner do not restrict it, because automotive pile is far shallower than the deep household carpet that causes clearance trouble for home theater subwoofers sitting on short spikes. What does matter is that all four feet land on a solid, level surface.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's the difference between down-firing and a regular sealed enclosure?\u003c\/h3\u003e\n\u003cp\u003eBoth are sealed alignments and the cabinet construction is the same. What changes is orientation. A rear-firing sealed box creates a directional source pointed at the cabin. A down-firing sealed box uses the floor to redistribute that output, which reads as less directional from the listening position.\u003c\/p\u003e\n\n\u003ch3\u003eWhat size amplifier do I need?\u003c\/h3\u003e\n\u003cp\u003eThe driver sets it, not the orientation. Match the amplifier's RMS output at your final wired impedance to the driver's RMS rating, and check the impedance math before you buy: two 2-ohm drivers in parallel present 1 ohm, two 4-ohm drivers in parallel present 2 ohms, and two 2-ohm drivers in series present 4 ohms. A monoblock rated at the driver's RMS at that impedance is the standard approach.\u003c\/p\u003e\n\n\u003ch3\u003eWhich drivers do these fit?\u003c\/h3\u003e\n\u003cp\u003eDriver-matched cabinets are cut for Alpine, Arc Audio, Diamond Audio, Focal, Hertz, JL Audio, Kicker, Morel, Prodigy, ResoNix, Rockford Fosgate and Wavtech, in 10, 12 and 15 inch, single, dual and triple, across Performance Optimized and Micro Series. The two universal-cutout boxes fit a standard cutout and volume range if your driver is not on the matched list. Enclosures are sold empty unless the listing says loaded.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","products":[{"product_id":"proline-x-micro-series-sealed-dual-12-enclosure-loaded-wavtech-thinpro-12","title":"Proline X Dual 12\" Sealed Micro Series System | Loaded with Wavtech thinPRO12","description":"\u003cstyle\u003e\n.pl-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#cbd5e1;max-width:1100px;margin:0 auto;background:#020617;}\n.pl-wrap *{box-sizing:border-box;}\n.pl-hero{background:linear-gradient(135deg,#020617 0%,#2e1065 100%);padding:54px 36px;text-align:center;color:#fff;}\n.pl-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 12px;color:#fff;}\n.pl-hero p{font-size:1.1em;font-weight:300;opacity:.93;margin:0 0 22px;color:#cbd5e1;}\n.pl-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;}\n.pl-badge{background:rgba(139,92,246,.18);border:1px solid 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th{background:#020617;color:#94a3b8;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #334155;}\n.pl-enc-table td{padding:12px 14px;border-bottom:1px solid #1e293b;color:#cbd5e1;font-size:.95em;}\n.pl-enc-table tr:last-child td{border-bottom:none;}\n.pl-opt td{background:#2e1065;color:#fff;font-weight:600;}\n.pl-char{display:block;font-size:.78em;color:#94a3b8;font-weight:400;margin-top:2px;}\n.pl-opt .pl-char{color:#c4b5fd;}\n.pl-graph{background:#020617;border:1px solid #334155;border-radius:8px;padding:14px;margin:18px 0;}\n.pl-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#94a3b8;margin:0 0 10px;}\n.pl-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px;}\n.pl-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#94a3b8;}\n.pl-sw{width:22px;height:3px;border-radius:2px;display:inline-block;}\n.pl-note{background:#1e293b;border:1px solid #334155;border-radius:8px;padding:14px 16px;margin-top:6px;}\n.pl-note p{margin:0;color:#cbd5e1;font-size:13.5px;line-height:1.6;}\n.pl-link{color:#a78bfa;text-decoration:underline;}\n.pl-cta{background:linear-gradient(135deg,#020617 0%,#2e1065 100%);padding:40px 36px;text-align:center;color:#fff;}\n.pl-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0;}\n.pl-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#cbd5e1;}\n@media(max-width:600px){.pl-hero h2{font-size:1.7em;}.pl-section,.pl-enc,.pl-cta,.pl-hero{padding-left:20px;padding-right:20px;}}\n\u003c\/style\u003e\n\u003cdiv class=\"pl-wrap\"\u003e\n\n\u003cdiv class=\"pl-hero\"\u003e\n\u003ch2\u003eProline X Micro Series Enclosure for the Wavtech thinPRO 12\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of Wavtech thinPRO 12 drivers\u003c\/p\u003e\n\u003cdiv class=\"pl-badges\"\u003e\n\u003cspan class=\"pl-badge\"\u003eCNC Stack-Fab\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003e1.20 cu ft Net\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eFits Wavtech thinPRO 12\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-stats\"\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.20\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.857\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e41.4 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e3.0 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ethinPRO 12 mounting depth\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eBuilt Around the Wavtech thinPRO 12\u003c\/h3\u003e\n\u003cp\u003eNothing about this box is generic. Every layer is cut to the thinPRO 12's published sealed target, with the baffle bored to the thinPRO 12's 11.125 in cutout with 8\/32 threaded inserts set on the back face, and clearance cut for its 3.0 in mounting depth.\u003c\/p\u003e\n\u003cp\u003eThe thinPRO 12 carries a published \u003cstrong\u003eFs of 25 Hz, Qts of 0.49 and Vas of 42 litres\u003c\/strong\u003e, and an EBP of 45, which puts it in sealed enclosure territory. We ran the alignment math on that data and built the box to land where it belongs.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eTwo Drivers, Two Sealed Chambers\u003c\/h3\u003e\n\u003cp\u003eA full divider splits this cabinet down the middle. Each thinPRO 12 gets its own \u003cstrong\u003e0.60 cubic foot\u003c\/strong\u003e sealed volume, 1.20 cubic feet total. Neither driver sees the other's back pressure, so the pair behaves like two matched single builds rather than one shared chamber.\u003c\/p\u003e\n\u003cdiv class=\"pl-highlight\"\u003e\n\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated by summing\neach CNC cut layer's opening, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eProline X Micro Series Construction\u003c\/h3\u003e\n\u003cp\u003eThis enclosure is stack fabricated on our ShopSabre routers from Langboard Elite 3\/4 inch MDF,\na dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE.\nEvery layer is a precision cut ring and the stacked layers do the joining themselves, so there is no butt joint or dado to flex or leak. Dowel reinforcement runs between layers as tension hardware only.\u003c\/p\u003e\n\u003cdiv class=\"pl-grid\"\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003eThreaded Inserts, Not Wood Screws\u003c\/h4\u003e\n\u003cp\u003e8\/32 threaded inserts are set on the backside of the baffle so the driver mounts on machine screws. Pull it a dozen times and the threads are still there.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired internally with \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. No CCA anywhere in the build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003eDamped and Finished\u003c\/h4\u003e\n\u003cp\u003ePolyfill is pre-installed to smooth the in box response, and the shell is wrapped in plush black carpet. Built in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eEnclosure Only or Loaded\u003c\/h3\u003e\n\u003cp\u003eOrder the enclosure bare and mount your own pair of thinPRO 12 drivers, or order it loaded and we mount the drivers, dress the wiring and ship it ready to bolt in.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-enc\"\u003e\n\u003ch3\u003eSealed Enclosure Performance: Pre-Calculated\u003c\/h3\u003e\n\u003cp\u003eUsing the published Thiele Small parameters for the Wavtech thinPRO 12, here is the predicted Qtc,\nsystem resonance (Fc) and F3 rolloff for this enclosure. Calculated with the same formulas\nas the Audio Intensity Sealed Box Calculator.\u003c\/p\u003e\n\n\u003cdiv class=\"pl-enc-card\"\u003e\n\u003cdiv class=\"pl-enc-head\"\u003eWavtech thinPRO 12 thinPRO12-2  |  Qts 0.49  |  Fs 25 Hz  |  Vas 42 L\u003c\/div\u003e\n\u003ctable class=\"pl-enc-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eEnclosure Size\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003eFc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pl-opt\"\u003e\n\u003ctd\u003e0.60 cu ft \u003cspan class=\"pl-char\"\u003eper chamber, 1.20 cu ft total\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.913\u003c\/td\u003e\n\u003ctd\u003e46.6 Hz\u003c\/td\u003e\n\u003ctd\u003e38.3 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-graph\"\u003e\n\u003cp class=\"pl-graph-title\"\u003eWavtech thinPRO 12 Frequency Response | Sealed, 0.60 cu ft\u003c\/p\u003e\n\u003csvg viewbox=\"0 0 680 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sans-serif\"\u003e-6dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"117.6\" y2=\"117.6\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"121.6\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e-3dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"66.8\" y2=\"66.8\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"70.8\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e0dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"16.0\" y2=\"16.0\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"20.0\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e3dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"117.6\" y2=\"117.6\" stroke=\"#8b5cf6\" stroke-width=\"1.4\" stroke-dasharray=\"4 3\" opacity=\"0.85\"\u003e\u003c\/line\u003e\n\u003ctext x=\"660\" y=\"112.6\" text-anchor=\"end\" font-size=\"10\" fill=\"#a78bfa\" font-family=\"Arial, sans-serif\"\u003e-3dB\u003c\/text\u003e\n\u003cline x1=\"42.0\" x2=\"42.0\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"42.0\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e20Hz\u003c\/text\u003e\n\u003cline x1=\"135.1\" x2=\"135.1\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"135.1\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e30Hz\u003c\/text\u003e\n\u003cline x1=\"252.5\" x2=\"252.5\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"252.5\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e50Hz\u003c\/text\u003e\n\u003cline x1=\"411.7\" x2=\"411.7\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"411.7\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e100Hz\u003c\/text\u003e\n\u003cline x1=\"570.9\" x2=\"570.9\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"570.9\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e200Hz\u003c\/text\u003e\n\u003cline x1=\"664.0\" x2=\"664.0\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"664.0\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e300Hz\u003c\/text\u003e\n\u003crect x=\"42\" y=\"16\" width=\"622\" height=\"254\" fill=\"none\" stroke=\"#334155\" 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394.5,55.9 396.5,56.0 398.6,56.1 400.7,56.2 402.8,56.3 404.8,56.4 406.9,56.6 409.0,56.7 411.1,56.8 413.1,56.9 415.2,57.1 417.3,57.2 419.3,57.3 421.4,57.4 423.5,57.5 425.6,57.7 427.6,57.8 429.7,57.9 431.8,58.0 433.9,58.1 435.9,58.3 438.0,58.4 440.1,58.5 442.2,58.6 444.2,58.7 446.3,58.8 448.4,58.9 450.4,59.1 452.5,59.2 454.6,59.3 456.7,59.4 458.7,59.5 460.8,59.6 462.9,59.7 465.0,59.8 467.0,59.9 469.1,60.0 471.2,60.1 473.3,60.2 475.3,60.3 477.4,60.4 479.5,60.5 481.5,60.6 483.6,60.7 485.7,60.8 487.8,60.9 489.8,61.0 491.9,61.1 494.0,61.2 496.1,61.3 498.1,61.4 500.2,61.4 502.3,61.5 504.4,61.6 506.4,61.7 508.5,61.8 510.6,61.9 512.6,61.9 514.7,62.0 516.8,62.1 518.9,62.2 520.9,62.2 523.0,62.3 525.1,62.4 527.2,62.5 529.2,62.5 531.3,62.6 533.4,62.7 535.5,62.7 537.5,62.8 539.6,62.9 541.7,62.9 543.7,63.0 545.8,63.1 547.9,63.1 550.0,63.2 552.0,63.3 554.1,63.3 556.2,63.4 558.3,63.4 560.3,63.5 562.4,63.5 564.5,63.6 566.6,63.7 568.6,63.7 570.7,63.8 572.8,63.8 574.8,63.9 576.9,63.9 579.0,64.0 581.1,64.0 583.1,64.1 585.2,64.1 587.3,64.1 589.4,64.2 591.4,64.2 593.5,64.3 595.6,64.3 597.7,64.4 599.7,64.4 601.8,64.4 603.9,64.5 605.9,64.5 608.0,64.6 610.1,64.6 612.2,64.6 614.2,64.7 616.3,64.7 618.4,64.8 620.5,64.8 622.5,64.8 624.6,64.9 626.7,64.9 628.8,64.9 630.8,65.0 632.9,65.0 635.0,65.0 637.0,65.1 639.1,65.1 641.2,65.1 643.3,65.1 645.3,65.2 647.4,65.2 649.5,65.2 651.6,65.3 653.6,65.3 655.7,65.3 657.8,65.3 659.9,65.4 661.9,65.4 664.0,65.4\" fill=\"none\" stroke=\"#a78bfa\" stroke-width=\"2.4\" stroke-linejoin=\"round\"\u003e\u003c\/polyline\u003e\n\u003c\/svg\u003e\n\u003cdiv class=\"pl-legend\"\u003e\n\u003cspan class=\"pl-legend-item\"\u003e\u003cspan class=\"pl-sw\" style=\"background:#a78bfa;\"\u003e\u003c\/span\u003e0.60 cu ft (Qtc 0.857)\u003c\/span\u003e\n\u003cspan class=\"pl-legend-item\"\u003e\u003cspan class=\"pl-sw\" style=\"background:#8b5cf6;\"\u003e\u003c\/span\u003e-3dB reference\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-note\"\u003e\n\u003cp\u003e\u003cstrong style=\"color:#a78bfa;\"\u003eNote on coil choice:\u003c\/strong\u003e The figures above are the thinPRO12-2 set. The thinPRO12-4 carries Qts 0.46 and Vas 42 litres, and a different Fs of 26 Hz, which in this same 0.60 cubic foot volume lands at \u003cstrong\u003eQtc 0.857, Fc 48.4 Hz and F3 41.4 Hz\u003c\/strong\u003e. Worth accounting for if you are choosing between the two. \u003ca class=\"pl-link\" href=\"\/pages\/sealed-box-calculator\"\u003eRun your own numbers in the Sealed Box Calculator.\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eSelect your configuration above. This enclosure ships free to the lower 48 with a 2 year limited warranty, built one at a time in Tullahoma, Tennessee. Ordered loaded, the thinPRO 12 carries its own 1 year manufacturer warranty through authorized dealers.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"4 ohm \/ No Thanks","offer_id":42347678236761,"sku":"M12D-S Wav Loaded 4ohm Final","price":1799.99,"currency_code":"USD","in_stock":true},{"title":"4 ohm \/ Yes- Contact me for details","offer_id":42347680104537,"sku":null,"price":1899.99,"currency_code":"USD","in_stock":false},{"title":"2 ohm \/ No Thanks","offer_id":42347678269529,"sku":"M12D-S Wav Loaded 2ohm final","price":1799.99,"currency_code":"USD","in_stock":false},{"title":"2 ohm \/ Yes- Contact me for details","offer_id":42347680137305,"sku":"","price":1899.99,"currency_code":"USD","in_stock":false},{"title":"1 ohm \/ No Thanks","offer_id":42347678302297,"sku":"M12D-S Wav Loaded 1 ohm final","price":1799.99,"currency_code":"USD","in_stock":true},{"title":"1 ohm \/ Yes- Contact me for details","offer_id":42347680170073,"sku":null,"price":1899.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/loaded-dual-wavtech-thinpro12-subwoofers-proline-x-micro-series-sealed-enclosureenclosed-subwooferaudio-intensity-504909.jpg?v=1761970494"},{"product_id":"proline-x-micro-series-sealed-12-enclosure-loaded-wavtech-thinpro-12","title":"Proline X Single 12\" Sealed Micro Series System | Loaded with Wavtech thinPRO12","description":"\u003cstyle\u003e\n.pl-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#cbd5e1;max-width:1100px;margin:0 auto;background:#020617;}\n.pl-wrap *{box-sizing:border-box;}\n.pl-hero{background:linear-gradient(135deg,#020617 0%,#2e1065 100%);padding:54px 36px;text-align:center;color:#fff;}\n.pl-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 12px;color:#fff;}\n.pl-hero p{font-size:1.1em;font-weight:300;opacity:.93;margin:0 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10px;}\n.pl-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px;}\n.pl-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#94a3b8;}\n.pl-sw{width:22px;height:3px;border-radius:2px;display:inline-block;}\n.pl-note{background:#1e293b;border:1px solid #334155;border-radius:8px;padding:14px 16px;margin-top:6px;}\n.pl-note p{margin:0;color:#cbd5e1;font-size:13.5px;line-height:1.6;}\n.pl-link{color:#a78bfa;text-decoration:underline;}\n.pl-cta{background:linear-gradient(135deg,#020617 0%,#2e1065 100%);padding:40px 36px;text-align:center;color:#fff;}\n.pl-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0;}\n.pl-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#cbd5e1;}\n@media(max-width:600px){.pl-hero h2{font-size:1.7em;}.pl-section,.pl-enc,.pl-cta,.pl-hero{padding-left:20px;padding-right:20px;}}\n\u003c\/style\u003e\n\u003cdiv class=\"pl-wrap\"\u003e\n\n\u003cdiv class=\"pl-hero\"\u003e\n\u003ch2\u003eProline X Micro Series Enclosure for the Wavtech thinPRO 12\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Wavtech thinPRO 12\u003c\/p\u003e\n\u003cdiv class=\"pl-badges\"\u003e\n\u003cspan class=\"pl-badge\"\u003eCNC Stack-Fab\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003e0.60 cu ft Net\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eFits Wavtech thinPRO 12\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-stats\"\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.60\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.857\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e41.4 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e3.0 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ethinPRO 12 mounting depth\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eBuilt Around the Wavtech thinPRO 12\u003c\/h3\u003e\n\u003cp\u003eNothing about this box is generic. Every layer is cut to the thinPRO 12's published sealed target, with the baffle bored to the thinPRO 12's 11.125 in cutout with 8\/32 threaded inserts set on the back face, and clearance cut for its 3.0 in mounting depth.\u003c\/p\u003e\n\u003cp\u003eThe thinPRO 12 carries a published \u003cstrong\u003eFs of 25 Hz, Qts of 0.49 and Vas of 42 litres\u003c\/strong\u003e, and an EBP of 45, which puts it in sealed enclosure territory. We ran the alignment math on that data and built the box to land where it belongs.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.60 cubic feet net\u003c\/strong\u003e, against a published recommendation of 0.6 cu ft. The volume quoted is true net internal airspace, measured after the walls, bracing and driver displacement are accounted for.\u003c\/p\u003e\n\u003cdiv class=\"pl-highlight\"\u003e\n\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated by summing\neach CNC cut layer's opening, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eProline X Micro Series Construction\u003c\/h3\u003e\n\u003cp\u003eThis enclosure is stack fabricated on our ShopSabre routers from Langboard Elite 3\/4 inch MDF,\na dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE.\nEvery layer is a precision cut ring and the stacked layers do the joining themselves, so there is no butt joint or dado to flex or leak. Dowel reinforcement runs between layers as tension hardware only.\u003c\/p\u003e\n\u003cdiv class=\"pl-grid\"\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003eThreaded Inserts, Not Wood Screws\u003c\/h4\u003e\n\u003cp\u003e8\/32 threaded inserts are set on the backside of the baffle so the driver mounts on machine screws. Pull it a dozen times and the threads are still there.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired internally with \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. No CCA anywhere in the build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003eDamped and Finished\u003c\/h4\u003e\n\u003cp\u003ePolyfill is pre-installed to smooth the in box response, and the shell is wrapped in plush black carpet. Built in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eEnclosure Only or Loaded\u003c\/h3\u003e\n\u003cp\u003eOrder the enclosure bare and mount your own thinPRO 12, or order it loaded and we mount the driver, dress the wiring and ship it ready to bolt in.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-enc\"\u003e\n\u003ch3\u003eSealed Enclosure Performance: Pre-Calculated\u003c\/h3\u003e\n\u003cp\u003eUsing the published Thiele Small parameters for the Wavtech thinPRO 12, here is the predicted Qtc,\nsystem resonance (Fc) and F3 rolloff for this enclosure. Calculated with the same formulas\nas the Audio Intensity Sealed Box Calculator.\u003c\/p\u003e\n\n\u003cdiv class=\"pl-enc-card\"\u003e\n\u003cdiv class=\"pl-enc-head\"\u003eWavtech thinPRO 12 thinPRO12-2  |  Qts 0.49  |  Fs 25 Hz  |  Vas 42 L\u003c\/div\u003e\n\u003ctable class=\"pl-enc-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eEnclosure Size\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003eFc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pl-opt\"\u003e\n\u003ctd\u003e0.60 cu ft \u003cspan class=\"pl-char\"\u003eas built\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.913\u003c\/td\u003e\n\u003ctd\u003e46.6 Hz\u003c\/td\u003e\n\u003ctd\u003e38.3 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-graph\"\u003e\n\u003cp class=\"pl-graph-title\"\u003eWavtech thinPRO 12 Frequency Response | Sealed, 0.60 cu ft\u003c\/p\u003e\n\u003csvg viewbox=\"0 0 680 300\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:100%;height:auto;display:block;\"\u003e\n\u003crect x=\"0\" y=\"0\" width=\"680\" height=\"300\" fill=\"#0f172a\"\u003e\u003c\/rect\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"270.0\" y2=\"270.0\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"274.0\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e-12dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"219.2\" y2=\"219.2\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"223.2\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e-9dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"168.4\" y2=\"168.4\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"172.4\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e-6dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"117.6\" y2=\"117.6\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"121.6\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e-3dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"66.8\" y2=\"66.8\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"70.8\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e0dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"16.0\" y2=\"16.0\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"20.0\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e3dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"117.6\" y2=\"117.6\" stroke=\"#8b5cf6\" stroke-width=\"1.4\" stroke-dasharray=\"4 3\" opacity=\"0.85\"\u003e\u003c\/line\u003e\n\u003ctext x=\"660\" y=\"112.6\" text-anchor=\"end\" font-size=\"10\" fill=\"#a78bfa\" font-family=\"Arial, sans-serif\"\u003e-3dB\u003c\/text\u003e\n\u003cline x1=\"42.0\" x2=\"42.0\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"42.0\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e20Hz\u003c\/text\u003e\n\u003cline x1=\"135.1\" x2=\"135.1\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"135.1\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e30Hz\u003c\/text\u003e\n\u003cline x1=\"252.5\" x2=\"252.5\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"252.5\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e50Hz\u003c\/text\u003e\n\u003cline x1=\"411.7\" x2=\"411.7\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"411.7\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e100Hz\u003c\/text\u003e\n\u003cline x1=\"570.9\" x2=\"570.9\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"570.9\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e200Hz\u003c\/text\u003e\n\u003cline x1=\"664.0\" x2=\"664.0\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"664.0\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e300Hz\u003c\/text\u003e\n\u003crect x=\"42\" y=\"16\" width=\"622\" height=\"254\" fill=\"none\" stroke=\"#334155\" 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207.9,102.0 209.9,100.2 212.0,98.4 214.1,96.6 216.2,94.9 218.2,93.2 220.3,91.5 222.4,89.9 224.5,88.3 226.5,86.8 228.6,85.3 230.7,83.9 232.7,82.4 234.8,81.1 236.9,79.7 239.0,78.4 241.0,77.2 243.1,76.0 245.2,74.8 247.3,73.7 249.3,72.6 251.4,71.5 253.5,70.5 255.6,69.5 257.6,68.6 259.7,67.7 261.8,66.8 263.8,66.0 265.9,65.2 268.0,64.4 270.1,63.7 272.1,63.0 274.2,62.3 276.3,61.7 278.4,61.1 280.4,60.5 282.5,60.0 284.6,59.5 286.7,59.0 288.7,58.6 290.8,58.1 292.9,57.7 294.9,57.4 297.0,57.0 299.1,56.7 301.2,56.4 303.2,56.1 305.3,55.8 307.4,55.6 309.5,55.4 311.5,55.2 313.6,55.0 315.7,54.8 317.8,54.7 319.8,54.6 321.9,54.4 324.0,54.3 326.0,54.2 328.1,54.2 330.2,54.1 332.3,54.1 334.3,54.0 336.4,54.0 338.5,54.0 340.6,54.0 342.6,54.0 344.7,54.0 346.8,54.0 348.9,54.0 350.9,54.1 353.0,54.1 355.1,54.1 357.1,54.2 359.2,54.3 361.3,54.3 363.4,54.4 365.4,54.5 367.5,54.5 369.6,54.6 371.7,54.7 373.7,54.8 375.8,54.9 377.9,55.0 380.0,55.1 382.0,55.2 384.1,55.3 386.2,55.4 388.2,55.5 390.3,55.6 392.4,55.7 394.5,55.9 396.5,56.0 398.6,56.1 400.7,56.2 402.8,56.3 404.8,56.4 406.9,56.6 409.0,56.7 411.1,56.8 413.1,56.9 415.2,57.1 417.3,57.2 419.3,57.3 421.4,57.4 423.5,57.5 425.6,57.7 427.6,57.8 429.7,57.9 431.8,58.0 433.9,58.1 435.9,58.3 438.0,58.4 440.1,58.5 442.2,58.6 444.2,58.7 446.3,58.8 448.4,58.9 450.4,59.1 452.5,59.2 454.6,59.3 456.7,59.4 458.7,59.5 460.8,59.6 462.9,59.7 465.0,59.8 467.0,59.9 469.1,60.0 471.2,60.1 473.3,60.2 475.3,60.3 477.4,60.4 479.5,60.5 481.5,60.6 483.6,60.7 485.7,60.8 487.8,60.9 489.8,61.0 491.9,61.1 494.0,61.2 496.1,61.3 498.1,61.4 500.2,61.4 502.3,61.5 504.4,61.6 506.4,61.7 508.5,61.8 510.6,61.9 512.6,61.9 514.7,62.0 516.8,62.1 518.9,62.2 520.9,62.2 523.0,62.3 525.1,62.4 527.2,62.5 529.2,62.5 531.3,62.6 533.4,62.7 535.5,62.7 537.5,62.8 539.6,62.9 541.7,62.9 543.7,63.0 545.8,63.1 547.9,63.1 550.0,63.2 552.0,63.3 554.1,63.3 556.2,63.4 558.3,63.4 560.3,63.5 562.4,63.5 564.5,63.6 566.6,63.7 568.6,63.7 570.7,63.8 572.8,63.8 574.8,63.9 576.9,63.9 579.0,64.0 581.1,64.0 583.1,64.1 585.2,64.1 587.3,64.1 589.4,64.2 591.4,64.2 593.5,64.3 595.6,64.3 597.7,64.4 599.7,64.4 601.8,64.4 603.9,64.5 605.9,64.5 608.0,64.6 610.1,64.6 612.2,64.6 614.2,64.7 616.3,64.7 618.4,64.8 620.5,64.8 622.5,64.8 624.6,64.9 626.7,64.9 628.8,64.9 630.8,65.0 632.9,65.0 635.0,65.0 637.0,65.1 639.1,65.1 641.2,65.1 643.3,65.1 645.3,65.2 647.4,65.2 649.5,65.2 651.6,65.3 653.6,65.3 655.7,65.3 657.8,65.3 659.9,65.4 661.9,65.4 664.0,65.4\" fill=\"none\" stroke=\"#a78bfa\" stroke-width=\"2.4\" stroke-linejoin=\"round\"\u003e\u003c\/polyline\u003e\n\u003c\/svg\u003e\n\u003cdiv class=\"pl-legend\"\u003e\n\u003cspan class=\"pl-legend-item\"\u003e\u003cspan class=\"pl-sw\" style=\"background:#a78bfa;\"\u003e\u003c\/span\u003e0.60 cu ft (Qtc 0.857)\u003c\/span\u003e\n\u003cspan class=\"pl-legend-item\"\u003e\u003cspan class=\"pl-sw\" style=\"background:#8b5cf6;\"\u003e\u003c\/span\u003e-3dB reference\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-note\"\u003e\n\u003cp\u003e\u003cstrong style=\"color:#a78bfa;\"\u003eNote on coil choice:\u003c\/strong\u003e The figures above are the thinPRO12-2 set. The thinPRO12-4 carries Qts 0.46 and Vas 42 litres, and a different Fs of 26 Hz, which in this same 0.60 cubic foot volume lands at \u003cstrong\u003eQtc 0.857, Fc 48.4 Hz and F3 41.4 Hz\u003c\/strong\u003e. Worth accounting for if you are choosing between the two. \u003ca class=\"pl-link\" href=\"\/pages\/sealed-box-calculator\"\u003eRun your own numbers in the Sealed Box Calculator.\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eSelect your configuration above. This enclosure ships free to the lower 48 with a 2 year limited warranty, built one at a time in Tullahoma, Tennessee. Ordered loaded, the thinPRO 12 carries its own 1 year manufacturer warranty through authorized dealers.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"4 ohm","offer_id":42349748093017,"sku":"M12-S WAV S4","price":899.99,"currency_code":"USD","in_stock":false},{"title":"2 ohm","offer_id":42349748158553,"sku":"M12-S WAV S2","price":899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-loaded-micro-series-sealed-enclosure-wavtech-thinpro12-subwooferenclosed-subwooferproline-x-4562595.jpg?v=1764960271"},{"product_id":"proline-x-micro-series-sealed-10-enclosure-loaded-jl-audio-10tw3-d4","title":"Proline X Single 10\" Sealed Micro Series System | Loaded with JL Audio 10TW3","description":"\u003cstyle\u003e\n.pl-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#cbd5e1;max-width:1100px;margin:0 auto;background:#020617;}\n.pl-wrap 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h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0;}\n.pl-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#cbd5e1;}\n@media(max-width:600px){.pl-hero h2{font-size:1.7em;}.pl-section,.pl-enc,.pl-cta,.pl-hero{padding-left:20px;padding-right:20px;}}\n\u003c\/style\u003e\n\u003cdiv class=\"pl-wrap\"\u003e\n\n\u003cdiv class=\"pl-hero\"\u003e\n\u003ch2\u003eProline X Micro Series Enclosure for the JL Audio 10TW3-D4\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the JL Audio 10TW3-D4\u003c\/p\u003e\n\u003cdiv class=\"pl-badges\"\u003e\n\u003cspan class=\"pl-badge\"\u003eCNC Stack-Fab\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003e0.50 cu ft Net\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eFits JL Audio 10TW3-D4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-stats\"\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.50\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.960\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e40.1 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e3.25 in\u003c\/span\u003e\u003cspan class=\"l\"\u003e10TW3-D4 mounting depth\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/JL_Audio_10TW3-D4_in_Proline_X_Micro_Series_Enclosure_-_Stack_fab_II_600x600.jpg?v=1747715220\" alt=\"JL Audio 10TW3-D4 in Proline X Micro Series Enclosure - Stackfab II\" style=\"max-width:100%;height:auto;border-radius:8px;\"\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eBuilt Around the JL Audio 10TW3-D4\u003c\/h3\u003e\n\u003cp\u003eNothing about this box is generic. Every layer is cut to the 10TW3-D4's published sealed target, with the baffle bored to the 10TW3-D4's 9.625 in cutout with 8\/32 threaded inserts set on the back face, and clearance cut for its 3.25 in mounting depth.\u003c\/p\u003e\n\u003cp\u003eThe 10TW3-D4 carries a published \u003cstrong\u003eFs of 32.3 Hz, Qts of 0.62 and Vas of 19.82 litres\u003c\/strong\u003e, and an EBP of 49, which puts it in sealed enclosure territory. We ran the alignment math on that data and built the box to land where it belongs.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.50 cubic feet net\u003c\/strong\u003e, against a published recommendation of 0.50 cu ft. The volume quoted is true net internal airspace, measured after the walls, bracing and driver displacement are accounted for.\u003c\/p\u003e\n\u003cdiv class=\"pl-highlight\"\u003e\n\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated by summing\neach CNC cut layer's opening, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eProline X Micro Series Construction\u003c\/h3\u003e\n\u003cp\u003eThis enclosure is stack fabricated on our ShopSabre routers from Langboard Elite 3\/4 inch MDF,\na dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE.\nEvery layer is a precision cut ring and the stacked layers do the joining themselves, so there is no butt joint or dado to flex or leak. Dowel reinforcement runs between layers as tension hardware only.\u003c\/p\u003e\n\u003cdiv class=\"pl-grid\"\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003eThreaded Inserts, Not Wood Screws\u003c\/h4\u003e\n\u003cp\u003e8\/32 threaded inserts are set on the backside of the baffle so the driver mounts on machine screws. Pull it a dozen times and the threads are still there.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired internally with \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. No CCA anywhere in the build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003eDamped and Finished\u003c\/h4\u003e\n\u003cp\u003ePolyfill is pre-installed to smooth the in box response, and the shell is wrapped in plush black carpet. Built in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eEnclosure Only or Loaded\u003c\/h3\u003e\n\u003cp\u003eOrder the enclosure bare and mount your own 10TW3-D4, or order it loaded and we mount the driver, dress the wiring and ship it ready to bolt in.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-enc\"\u003e\n\u003ch3\u003eSealed Enclosure Performance: Pre-Calculated\u003c\/h3\u003e\n\u003cp\u003eUsing the published Thiele Small parameters for the JL Audio 10TW3-D4, here is the predicted Qtc,\nsystem resonance (Fc) and F3 rolloff for this enclosure. Calculated with the same formulas\nas the Audio Intensity Sealed Box Calculator.\u003c\/p\u003e\n\n\u003cdiv class=\"pl-enc-card\"\u003e\n\u003cdiv class=\"pl-enc-head\"\u003eJL Audio 10TW3-D4 D2  |  Qts 0.62  |  Fs 32.3 Hz  |  Vas 19.82 L\u003c\/div\u003e\n\u003ctable class=\"pl-enc-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eEnclosure Size\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003eFc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pl-opt\"\u003e\n\u003ctd\u003e0.50 cu ft \u003cspan class=\"pl-char\"\u003eas built\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.960\u003c\/td\u003e\n\u003ctd\u003e50.0 Hz\u003c\/td\u003e\n\u003ctd\u003e40.1 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-graph\"\u003e\n\u003cp class=\"pl-graph-title\"\u003eJL Audio 10TW3-D4 Frequency Response | Sealed, 0.50 cu ft\u003c\/p\u003e\n\u003csvg viewbox=\"0 0 680 300\" 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class=\"pl-note\"\u003e\n\u003cp\u003e\u003cstrong style=\"color:#a78bfa;\"\u003eNote on coil choice:\u003c\/strong\u003e This alignment is calculated from the published T\/S for the 10TW3-D4 in the D2 parallel set. The D4 variant carries slightly different Qts and Vas figures and will land a marginally different sealed alignment. \u003ca class=\"pl-link\" href=\"\/pages\/sealed-box-calculator\"\u003eRun your own numbers in the Sealed Box Calculator.\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eSelect your configuration above. This enclosure ships free to the lower 48 with a 2 year limited warranty, built one at a time in Tullahoma, Tennessee. Ordered loaded, the 10TW3-D4 carries its own 1 year manufacturer warranty through authorized dealers.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":42380340592729,"sku":"M10-S JL SF","price":699.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/jl-audio-10tw3-d4-in-proline-x-micro-series-enclosureenclosed-subwooferproline-x-723913.jpg?v=1761970512"},{"product_id":"proline-x-bronco-edition-dual-12-down-firing-sealed-subwoofer-box","title":"Proline X Bronco Edition Dual 12\" Down-Firing Sealed Subwoofer Enclosure","description":"\u003c!-- ============================================================\n     PROLINE X VEHICLE SPECIFIC SERIES — BRONCO EDITION DUAL 12\" DOWN-FIRING\n     PRODUCT DESCRIPTION HTML\n     Color system: Electric Blue (#2563eb \/ #1e40af primary)\n     Enclosure-only SKU\n     ============================================================ --\u003e\n\n\u003cstyle\u003e\n  .vs-wrap * { box-sizing: border-box; }\n  .vs-wrap { font-family: inherit; color: #1e293b; line-height: 1.7; max-width: 1200px; }\n\n  \/* ── Hero ── *\/\n  .vs-hero {\n    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);\n    border-radius: 8px;\n    padding: 40px 36px;\n    margin-bottom: 32px;\n    position: relative;\n    overflow: hidden;\n  }\n  .vs-hero::before {\n    content: '';\n    position: absolute;\n    top: -60px;\n    right: -60px;\n    width: 260px;\n    height: 260px;\n    background: rgba(37, 99, 235, 0.12);\n    border-radius: 50%;\n  }\n  .vs-hero::after {\n    content: '';\n    position: absolute;\n    bottom: -40px;\n    right: 80px;\n    width: 160px;\n    height: 160px;\n    background: rgba(59, 130, 246, 0.08);\n    border-radius: 50%;\n  }\n  .vs-hero-badge {\n    display: inline-block;\n    background: rgba(37, 99, 235, 0.25);\n    color: #93c5fd;\n    font-size: 0.72em;\n    font-weight: 700;\n    letter-spacing: 0.12em;\n    text-transform: uppercase;\n    padding: 4px 14px;\n    border-radius: 3px;\n    border: 1px solid rgba(147, 197, 253, 0.3);\n    margin-bottom: 18px;\n  }\n  .vs-hero h2 {\n    color: #ffffff;\n    font-size: 1.85em;\n    font-weight: 800;\n    margin: 0 0 16px 0;\n    line-height: 1.2;\n  }\n  .vs-hero h2 span { color: #93c5fd; 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}\n\n  \/* ── Warranty ── *\/\n  .vs-warranty {\n    background: #0f172a;\n    border-left: 5px solid #2563eb;\n    border-radius: 0 6px 6px 0;\n    padding: 20px 28px;\n    margin: 28px 0;\n    display: flex;\n    align-items: center;\n    gap: 20px;\n  }\n  .vs-warranty-badge {\n    background: #2563eb;\n    color: #ffffff;\n    font-size: 1em;\n    font-weight: 800;\n    padding: 10px 16px;\n    border-radius: 4px;\n    white-space: nowrap;\n  }\n  .vs-warranty p { color: #cbd5e1; font-size: 0.93em; margin: 0; line-height: 1.6; }\n  .vs-warranty strong { color: #ffffff; }\n\n  \/* ── Fitment List ── *\/\n  .vs-fitment-list {\n    list-style: none;\n    margin: 14px 0 0 0;\n    padding: 0;\n    display: grid;\n    grid-template-columns: repeat(2, 1fr);\n    gap: 8px;\n  }\n  @media (max-width: 560px) { .vs-fitment-list { grid-template-columns: 1fr; } }\n  .vs-fitment-list li {\n    font-size: 0.93em;\n    color: #334155;\n    padding: 8px 12px;\n    background: #eff6ff;\n    border-left: 3px solid #2563eb;\n    border-radius: 0 4px 4px 0;\n  }\n\n  .vs-divider { border: none; border-top: 1px solid #e2e8f0; margin: 32px 0; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"vs-wrap\"\u003e\n\n  \u003c!-- HERO --\u003e\n  \u003cdiv class=\"vs-hero\"\u003e\n    \u003cspan class=\"vs-hero-badge\"\u003eVehicle Specific Series | Bronco Edition | Enclosure Only\u003c\/span\u003e\n    \u003ch2\u003eDual 12\". \u003cspan\u003eDown-Firing.\u003c\/span\u003e\u003cbr\u003eBuilt for the 6th-Gen Bronco.\u003c\/h2\u003e\n    \u003cp\u003eThe Proline X Bronco Edition is a dual 12\" sealed enclosure engineered specifically for the 6th-generation Ford Bronco cargo area. \u003cstrong\u003eDown-firing orientation puts the drivers on the floor, keeps the top surface flat and functional, and uses ground-coupling to load the drivers acoustically.\u003c\/strong\u003e CNC-cut in Tennessee from Langboard Elite MDF. Pre-wired 12g OFC. Feet included. Drop it in, wire it up, and load gear on top.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FITMENT ALERT --\u003e\n  \u003cdiv class=\"vs-fitment-alert\"\u003e\n    \u003cspan class=\"vs-fitment-alert-icon\"\u003eFitment\u003c\/span\u003e\n    \u003cp\u003e\u003cstrong\u003eDesigned for 6th-generation Ford Bronco (2021–2025), 2-door and 4-door.\u003c\/strong\u003e This enclosure sits in the cargo area without factory mounting point integration. Confirm your available cargo dimensions and woofer mounting depth (8\" max) and cutout diameter (11.25\") before ordering.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION: Down-Firing --\u003e\n  \u003cdiv class=\"vs-section\"\u003e\n    \u003ch3\u003eDown-Firing Is Not a Compromise: It's a Design Decision\u003c\/h3\u003e\n    \u003cp\u003eDown-firing subwoofer placement uses the vehicle's floor surface as an acoustic boundary. When a driver fires into a hard, reflective surface at close range, the floor acts as a passive radiating plane. Loading the driver and reinforcing bass output across the low-frequency range. The result is deeper, fuller low-end than the same driver firing into open air in a standard orientation.\u003c\/p\u003e\n    \u003cp\u003eThe secondary function is practical. With both drivers facing down, the top surface of the enclosure is flat, unobstructed, and load-bearing. Gear goes on top. The subwoofers are protected from cargo contact. You don't give up the Bronco's cargo utility to run a real audio system.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WHY CARDS --\u003e\n  \u003cdiv class=\"vs-card-grid\"\u003e\n\n    \u003cdiv class=\"vs-card\"\u003e\n      \u003cspan class=\"vs-card-label\"\u003eAcoustic\u003c\/span\u003e\n      \u003ch4\u003eGround-Coupling Loads Both Drivers Simultaneously\u003c\/h4\u003e\n      \u003cdiv class=\"vs-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eDown-firing position places both drivers within inches of the Bronco's cargo floor. The floor acts as an acoustic boundary that loads both woofers simultaneously, reinforcing output and producing a broader, more even low-frequency response than a rear-firing or up-firing configuration in the same space.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"vs-card\"\u003e\n      \u003cspan class=\"vs-card-label\"\u003eAcoustic\u003c\/span\u003e\n      \u003ch4\u003ePolyfill Pre-Installed at the Factory\u003c\/h4\u003e\n      \u003cdiv class=\"vs-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eBoth sealed chambers ship with polyfill pre-installed. Polyfill acoustically extends the effective internal volume, improving low-frequency extension without increasing box size. \u003cstrong\u003eFactory installation ensures consistent packing density\u003c\/strong\u003e on every unit: not left to the installer to approximate in the field.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"vs-card\"\u003e\n      \u003cspan class=\"vs-card-label\"\u003eConstruction\u003c\/span\u003e\n      \u003ch4\u003eDado and V-Cut Joinery: No Butt Joints\u003c\/h4\u003e\n      \u003cdiv class=\"vs-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eEvery panel joint is machined with interlocking dado and V-cut geometry. The panels register mechanically before adhesive is applied, eliminating the gap variance that butt-jointed construction allows. \u003cstrong\u003eMechanical registration produces a tighter acoustic seal\u003c\/strong\u003e and a structurally stiffer assembly than surface-bonded panels.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"vs-card\"\u003e\n      \u003cspan class=\"vs-card-label\"\u003eConstruction\u003c\/span\u003e\n      \u003ch4\u003eInternal Bracing, Single-Layer Face, Rigidity by Structure\u003c\/h4\u003e\n      \u003cdiv class=\"vs-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe face panel is single-layer Langboard Elite MDF with internal bracing placed at span intervals to control panel flex under excursion load. Bracing transfers the mechanical energy of the drivers into the enclosure structure rather than allowing it to flex the baffle, keeping the acoustic seal intact at real power levels.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"vs-card\"\u003e\n      \u003cspan class=\"vs-card-label\"\u003eWiring\u003c\/span\u003e\n      \u003ch4\u003ePre-Wired 12g OFC: Ready to Connect\u003c\/h4\u003e\n      \u003cdiv class=\"vs-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eInternal wiring is 12-gauge oxygen-free copper, terminated at the Proline X terminal cup and pre-run to the woofer cutouts before shipping. \u003cstrong\u003ePull the leads, connect your drivers, done.\u003c\/strong\u003e No internal wiring work required at install. OFC construction eliminates the resistive loss and long-term oxidation that CCA wiring introduces.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"vs-card\"\u003e\n      \u003cspan class=\"vs-card-label\"\u003eMaterial\u003c\/span\u003e\n      \u003ch4\u003eLangboard Elite MDF, Published Mill Data, Not Marketing Language\u003c\/h4\u003e\n      \u003cdiv class=\"vs-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eLangboard Elite is a named, sourced, mill-documented panel product with published density, internal bond, and screw-holding specifications. \u003cstrong\u003e200 psi internal bond. 325 lb face screw holding.\u003c\/strong\u003e This is the same panel stock used across the full Proline X lineup, not a generic \"premium MDF\" designation with no verifiable spec behind it.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"vs-card\"\u003e\n      \u003cspan class=\"vs-card-label\"\u003eUniversal Fit\u003c\/span\u003e\n      \u003ch4\u003eUniversal Woofer Application: No Threaded Inserts\u003c\/h4\u003e\n      \u003cdiv class=\"vs-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe baffle is cut for universal 12\" mounting: \u003cstrong\u003e11.25\" cutout, 8\" max mounting depth\u003c\/strong\u003e. No threaded inserts means no proprietary bolt pattern to match. Mount any compliant 12\" driver with standard hardware. Pair with whatever woofer fits your power level and budget, Audiomobile, Crescendo, Image Dynamics, or your preferred brand.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"vs-card\"\u003e\n      \u003cspan class=\"vs-card-label\"\u003ePractical\u003c\/span\u003e\n      \u003ch4\u003eFeet Included: Proper Clearance Out of the Box\u003c\/h4\u003e\n      \u003cdiv class=\"vs-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eFeet are included and installed before shipment. They set the correct standoff distance between the enclosure and the Bronco's cargo floor. Enough clearance for the drivers to fire and pressurize the floor boundary without bottoming out. \u003cstrong\u003eNo improvised spacers, no field modifications required.\u003c\/strong\u003e\u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003chr class=\"vs-divider\"\u003e\n\n  \u003c!-- SECTION: Construction --\u003e\n  \u003cdiv class=\"vs-section\"\u003e\n    \u003ch3\u003eBuilt in Tennessee on ShopSabre CNC Routers\u003c\/h3\u003e\n    \u003cp\u003eEvery Proline X Vehicle Specific enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee. Panels are machined on ShopSabre CNC routers. Dado depth, V-cut geometry, cutout diameter, and external dimensions are held to spec on every unit. Internal volume is not approximated. It is calculated, programmed, and cut. The enclosure that ships to you performs to the same spec as the one used to develop the product.\u003c\/p\u003e\n    \u003cp\u003eFinished in plush black automotive carpet. Every unit is inspected before shipment.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION: Fitment --\u003e\n  \u003cdiv class=\"vs-section\"\u003e\n    \u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\n    \u003cul class=\"vs-fitment-list\"\u003e\n      \u003cli\u003e2021 Ford Bronco: 2-Door\u003c\/li\u003e\n      \u003cli\u003e2021 Ford Bronco: 4-Door\u003c\/li\u003e\n      \u003cli\u003e2022 Ford Bronco: 2-Door\u003c\/li\u003e\n      \u003cli\u003e2022 Ford Bronco: 4-Door\u003c\/li\u003e\n      \u003cli\u003e2023 Ford Bronco: 2-Door\u003c\/li\u003e\n      \u003cli\u003e2023 Ford Bronco: 4-Door\u003c\/li\u003e\n      \u003cli\u003e2024 Ford Bronco: 2-Door\u003c\/li\u003e\n      \u003cli\u003e2024 Ford Bronco: 4-Door\u003c\/li\u003e\n      \u003cli\u003e2025 Ford Bronco: 2-Door\u003c\/li\u003e\n      \u003cli\u003e2025 Ford Bronco: 4-Door\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp style=\"margin-top: 14px; font-size: 0.9em; color: #64748b;\"\u003eAll trim levels. Enclosure sits in cargo area. No factory mounting point integration. Confirm available cargo dimensions before ordering.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WARRANTY --\u003e\n  \u003cdiv class=\"vs-warranty\"\u003e\n    \u003cdiv class=\"vs-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n    \u003cp\u003e\u003cstrong\u003eAll Proline X Vehicle Specific Series enclosures are covered by a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Built and inspected in our Tennessee facility. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Version Bronco 1","offer_id":42385618174041,"sku":"VS FDB 12D-S DF-1","price":499.99,"currency_code":"USD","in_stock":true},{"title":"Version Bronco 2","offer_id":42385618206809,"sku":"VS FDB 12D-S DF-2","price":499.99,"currency_code":"USD","in_stock":true},{"title":"Version Bronco 3","offer_id":42385618239577,"sku":"VS FDB 12D-S DF-3","price":499.99,"currency_code":"USD","in_stock":true},{"title":"Version 4 - I'll Provide My Artwork","offer_id":42385618272345,"sku":"VS FDB 12D-S DF-4","price":549.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-bronco-edition-dual-12-down-firing-sealed-subwoofer-boxsubwoofer-enclosuresproline-x-817201.jpg?v=1761970522"},{"product_id":"proline-x-micro-series-sealed-10-enclosure-loaded-alpine-rsw10d4","title":"Proline X Single 10\" Sealed Micro Series System | Loaded with Alpine RSW10","description":"\u003cstyle\u003e\n.pl-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#cbd5e1;max-width:1100px;margin:0 auto;background:#020617;}\n.pl-wrap *{box-sizing:border-box;}\n.pl-hero{background:linear-gradient(135deg,#020617 0%,#2e1065 100%);padding:54px 36px;text-align:center;color:#fff;}\n.pl-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 12px;color:#fff;}\n.pl-hero p{font-size:1.1em;font-weight:300;opacity:.93;margin:0 0 22px;color:#cbd5e1;}\n.pl-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;}\n.pl-badge{background:rgba(139,92,246,.18);border:1px solid #8b5cf6;color:#c4b5fd;padding:7px 16px;border-radius:18px;font-size:.8em;font-weight:600;letter-spacing:.4px;}\n.pl-stats{display:flex;flex-wrap:wrap;background:#0f172a;}\n.pl-stat{flex:1 1 200px;text-align:center;padding:26px 16px;border-right:1px solid 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#1e293b;color:#cbd5e1;font-size:.95em;}\n.pl-enc-table tr:last-child td{border-bottom:none;}\n.pl-opt td{background:#2e1065;color:#fff;font-weight:600;}\n.pl-char{display:block;font-size:.78em;color:#94a3b8;font-weight:400;margin-top:2px;}\n.pl-opt .pl-char{color:#c4b5fd;}\n.pl-graph{background:#020617;border:1px solid #334155;border-radius:8px;padding:14px;margin:18px 0;}\n.pl-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#94a3b8;margin:0 0 10px;}\n.pl-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px;}\n.pl-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#94a3b8;}\n.pl-sw{width:22px;height:3px;border-radius:2px;display:inline-block;}\n.pl-note{background:#1e293b;border:1px solid #334155;border-radius:8px;padding:14px 16px;margin-top:6px;}\n.pl-note p{margin:0;color:#cbd5e1;font-size:13.5px;line-height:1.6;}\n.pl-link{color:#a78bfa;text-decoration:underline;}\n.pl-cta{background:linear-gradient(135deg,#020617 0%,#2e1065 100%);padding:40px 36px;text-align:center;color:#fff;}\n.pl-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0;}\n.pl-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#cbd5e1;}\n@media(max-width:600px){.pl-hero h2{font-size:1.7em;}.pl-section,.pl-enc,.pl-cta,.pl-hero{padding-left:20px;padding-right:20px;}}\n\u003c\/style\u003e\n\u003cdiv class=\"pl-wrap\"\u003e\n\n\u003cdiv class=\"pl-hero\"\u003e\n\u003ch2\u003eProline X Micro Series Enclosure for the Alpine RS-W10D4\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Alpine RS-W10D4\u003c\/p\u003e\n\u003cdiv class=\"pl-badges\"\u003e\n\u003cspan class=\"pl-badge\"\u003eCNC Stack-Fab\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003e0.50 cu ft Net\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eFits Alpine RS-W10D4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-stats\"\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.50\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.489-1.937\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.9-34.1 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e3.25 in\u003c\/span\u003e\u003cspan class=\"l\"\u003eRS-W10D4 mounting depth\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eBuilt Around the Alpine RS-W10D4\u003c\/h3\u003e\n\u003cp\u003eNothing about this box is generic. Every layer is cut to the RS-W10D4's published sealed target, with clearance cut for its 3.25 in mounting depth.\u003c\/p\u003e\n\u003cp\u003eThe RS-W10D4 carries a published \u003cstrong\u003eFs of 31 Hz, Qts of 1.19 and Vas of 23.35 litres\u003c\/strong\u003e, and an EBP of 21, which puts it in sealed enclosure territory. We ran the alignment math on that data and built the box to land where it belongs.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.50 cubic feet net\u003c\/strong\u003e, against a published recommendation of 0.45 to 1.0 cu ft. The volume quoted is true net internal airspace, measured after the walls, bracing and driver displacement are accounted for.\u003c\/p\u003e\n\u003cdiv class=\"pl-highlight\"\u003e\n\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated by summing\neach CNC cut layer's opening, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eProline X Micro Series Construction\u003c\/h3\u003e\n\u003cp\u003eThis enclosure is stack fabricated on our ShopSabre routers from Langboard Elite 3\/4 inch MDF,\na dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE.\nEvery layer is a precision cut ring and the stacked layers do the joining themselves, so there is no butt joint or dado to flex or leak. Dowel reinforcement runs between layers as tension hardware only.\u003c\/p\u003e\n\u003cdiv class=\"pl-grid\"\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003eThreaded Inserts, Not Wood Screws\u003c\/h4\u003e\n\u003cp\u003e8\/32 threaded inserts are set on the backside of the baffle so the driver mounts on machine screws. Pull it a dozen times and the threads are still there.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired internally with \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. No CCA anywhere in the build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003eDamped and Finished\u003c\/h4\u003e\n\u003cp\u003ePolyfill is pre-installed to smooth the in box response, and the shell is wrapped in plush black carpet. Built in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eEnclosure Only or Loaded\u003c\/h3\u003e\n\u003cp\u003eOrder the enclosure bare and mount your own RS-W10D4, or order it loaded and we mount the driver, dress the wiring and ship it ready to bolt in.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-enc\"\u003e\n\u003ch3\u003eSealed Enclosure Performance: Pre-Calculated\u003c\/h3\u003e\n\u003cp\u003eUsing the published Thiele Small parameters for the Alpine RS-W10D4, here is the predicted Qtc,\nsystem resonance (Fc) and F3 rolloff for this enclosure. Calculated with the same formulas\nas the Audio Intensity Sealed Box Calculator.\u003c\/p\u003e\n\n\u003cdiv class=\"pl-enc-card\"\u003e\n\u003cdiv class=\"pl-enc-head\"\u003eAlpine RS-W10D4 4 ohm + 4 ohm  |  Qts 1.19  |  Fs 31 Hz  |  Vas 23.35 L\u003c\/div\u003e\n\u003ctable class=\"pl-enc-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eEnclosure Size\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003eFc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pl-opt\"\u003e\n\u003ctd\u003e0.50 cu ft \u003cspan class=\"pl-char\"\u003eas built\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.937\u003c\/td\u003e\n\u003ctd\u003e50.5 Hz\u003c\/td\u003e\n\u003ctd\u003e34.1 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-graph\"\u003e\n\u003cp class=\"pl-graph-title\"\u003eAlpine RS-W10D4 Frequency Response | Sealed, 0.50 cu ft\u003c\/p\u003e\n\u003csvg viewbox=\"0 0 680 300\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:100%;height:auto;display:block;\"\u003e\n\u003crect x=\"0\" y=\"0\" width=\"680\" height=\"300\" fill=\"#0f172a\"\u003e\u003c\/rect\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"270.0\" y2=\"270.0\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"274.0\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e-12dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"219.2\" y2=\"219.2\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"223.2\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e-9dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"168.4\" y2=\"168.4\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"172.4\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e-6dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"117.6\" y2=\"117.6\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"121.6\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e-3dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"66.8\" y2=\"66.8\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"70.8\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e0dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"16.0\" y2=\"16.0\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"20.0\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e3dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"117.6\" y2=\"117.6\" stroke=\"#8b5cf6\" stroke-width=\"1.4\" stroke-dasharray=\"4 3\" 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587.3,59.7 589.4,59.8 591.4,59.9 593.5,60.0 595.6,60.2 597.7,60.3 599.7,60.4 601.8,60.5 603.9,60.6 605.9,60.7 608.0,60.9 610.1,61.0 612.2,61.1 614.2,61.2 616.3,61.3 618.4,61.4 620.5,61.5 622.5,61.6 624.6,61.7 626.7,61.8 628.8,61.8 630.8,61.9 632.9,62.0 635.0,62.1 637.0,62.2 639.1,62.3 641.2,62.4 643.3,62.4 645.3,62.5 647.4,62.6 649.5,62.7 651.6,62.7 653.6,62.8 655.7,62.9 657.8,63.0 659.9,63.0 661.9,63.1 664.0,63.2\" fill=\"none\" stroke=\"#a78bfa\" stroke-width=\"2.4\" stroke-linejoin=\"round\"\u003e\u003c\/polyline\u003e\n\u003c\/svg\u003e\n\u003cdiv class=\"pl-legend\"\u003e\n\u003cspan class=\"pl-legend-item\"\u003e\u003cspan class=\"pl-sw\" style=\"background:#a78bfa;\"\u003e\u003c\/span\u003e0.50 cu ft (Qtc 1.937)\u003c\/span\u003e\n\u003cspan class=\"pl-legend-item\"\u003e\u003cspan class=\"pl-sw\" style=\"background:#8b5cf6;\"\u003e\u003c\/span\u003e-3dB reference\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-note\"\u003e\u003cp\u003e\u003cstrong style=\"color:#a78bfa;\"\u003eNote on this alignment:\u003c\/strong\u003e Alpine publishes a Qts of 1.19 for the RS-W10D4, which is high for a sealed application. In 0.50 cubic feet that produces a rise around system resonance rather than a flat response, along with an F3 of 34.1 Hz. Alpine's own sealed recommendation for this driver is 0.45 to 1.0 cubic feet, and the figure stays above 1.6 across that whole range. The numbers above are calculated straight from Alpine's published parameters, not adjusted. \u003ca class=\"pl-link\" href=\"\/pages\/sealed-box-calculator\"\u003eRun your own numbers in the Sealed Box Calculator.\u003c\/a\u003e\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eSelect your configuration above. This enclosure ships free to the lower 48 with a 2 year limited warranty, built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":42458189594713,"sku":"M10-S ALP D4","price":899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/alpine-rsw10d4-shallow-subwoofer-in-proline-x-micro-series-enclosureenclosed-subwooferproline-x-886301.jpg?v=1761970632"},{"product_id":"proline-x-micro-series-m10-s-wav-sealed-10-subwoofer-enclosure-wavtech-thinpro-10","title":"Proline X Micro Series 10\" Sealed Enclosure - Fits Wavtech thinPRO10","description":"\u003c!-- ============================================================\n     PROLINE X MICRO SERIES — M10-S WAV\n     WAVTECH thinPRO 10 | SEALED ENCLOSURE ONLY\n     Color system: Green (#16a34a primary)\n     ============================================================ --\u003e\n\n\u003cstyle\u003e\n  .ms-wrap * { box-sizing: border-box; }\n  .ms-wrap { font-family: inherit; color: #1e293b; line-height: 1.7; max-width: 1200px; margin: 0 auto; }\n\n  \/* ── Hero ── *\/\n  .ms-hero {\n    background: linear-gradient(135deg, #0f172a 0%, #14532d 100%);\n    border-radius: 8px;\n    padding: 40px 36px;\n    margin-bottom: 32px;\n    position: relative;\n    overflow: hidden;\n  }\n  .ms-hero::before {\n    content: '';\n    position: absolute;\n    top: -40px; right: -40px;\n    width: 220px; height: 220px;\n    background: rgba(22,163,74,0.12);\n    border-radius: 50%;\n  }\n  .ms-hero-badge {\n    display: inline-block;\n    background: transparent;\n    border: 2px solid #16a34a;\n    color: #86efac;\n    font-size: 0.75em;\n    font-weight: 700;\n    letter-spacing: 0.12em;\n    text-transform: uppercase;\n    padding: 4px 14px;\n    border-radius: 20px;\n    margin-bottom: 16px;\n  }\n  .ms-hero h2 {\n    color: #ffffff;\n    font-size: 1.65em;\n    font-weight: 800;\n    margin: 0 0 14px 0;\n    line-height: 1.25;\n  }\n  .ms-hero p {\n    color: #cbd5e1;\n    font-size: 1em;\n    margin: 0 0 24px 0;\n    max-width: 640px;\n    line-height: 1.7;\n  }\n  .ms-hero-stats {\n    display: flex;\n    gap: 28px;\n    flex-wrap: wrap;\n  }\n  .ms-stat {\n    text-align: center;\n  }\n  .ms-stat-num {\n    display: block;\n    color: #86efac;\n    font-size: 1.5em;\n    font-weight: 800;\n    line-height: 1;\n  }\n  .ms-stat-label {\n    display: block;\n    color: #94a3b8;\n    font-size: 0.72em;\n    letter-spacing: 0.08em;\n    text-transform: uppercase;\n    margin-top: 4px;\n  }\n\n  \/* ── Sections ── *\/\n  .ms-section {\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-top: 4px solid #16a34a;\n    border-radius: 6px;\n    padding: 28px 32px;\n    margin-bottom: 24px;\n  }\n  .ms-section:nth-child(odd) { background: #f8fafc; }\n  .ms-section h3 {\n    color: #14532d;\n    font-size: 1.15em;\n    font-weight: 700;\n    margin: 0 0 14px 0;\n  }\n  .ms-section p {\n    color: #334155;\n    font-size: 0.97em;\n    margin: 0 0 12px 0;\n  }\n  .ms-section p:last-child { margin-bottom: 0; }\n\n  \/* ── Highlight block ── *\/\n  .ms-highlight {\n    background: #f0fdf4;\n    border-left: 5px solid #16a34a;\n    padding: 22px 28px;\n    margin: 28px 0;\n    border-radius: 0 6px 6px 0;\n  }\n  .ms-highlight h3 {\n    color: #14532d;\n    margin: 0 0 10px 0;\n    font-size: 1.1em;\n    font-weight: 700;\n  }\n  .ms-highlight h3 + h3 { margin-top: 18px; }\n  .ms-highlight p {\n    margin-bottom: 10px;\n    color: #1e293b;\n    font-size: 0.97em;\n  }\n  .ms-highlight p:last-child { margin-bottom: 0; }\n\n  \/* ── Alert ── *\/\n  .ms-alert {\n    background: #dcfce7;\n    border: 1px solid #16a34a;\n    border-radius: 6px;\n    padding: 14px 18px;\n    margin: 20px 0;\n    font-size: 0.93em;\n    color: #166534;\n  }\n  .ms-alert strong { color: #14532d; }\n\n  \/* ── Why-cards grid ── *\/\n  .ms-card-grid {\n    display: grid;\n    grid-template-columns: repeat(2, 1fr);\n    gap: 18px;\n    margin: 24px 0;\n  }\n  @media (max-width: 600px) { .ms-card-grid { grid-template-columns: 1fr; } }\n  .ms-card {\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-top: 3px solid #16a34a;\n    border-radius: 6px;\n    padding: 22px;\n  }\n  .ms-card-label {\n    display: inline-block;\n    background: #16a34a;\n    color: #ffffff;\n    font-size: 0.68em;\n    font-weight: 700;\n    letter-spacing: 0.1em;\n    text-transform: uppercase;\n    padding: 3px 10px;\n    border-radius: 3px;\n    margin-bottom: 10px;\n  }\n  .ms-card h4 {\n    color: #14532d;\n    font-size: 1em;\n    font-weight: 700;\n    margin: 0 0 10px 0;\n  }\n  .ms-card-divider {\n    height: 2px;\n    background: #16a34a;\n    width: 32px;\n    margin-bottom: 12px;\n    border-radius: 2px;\n  }\n  .ms-card p {\n    font-size: 0.93em;\n    color: #475569;\n    margin: 0;\n    line-height: 1.65;\n  }\n  .ms-card p strong { color: #14532d; }\n\n  \/* ── Warranty bar ── *\/\n  .ms-warranty {\n    background: #0f172a;\n    border-left: 5px solid #16a34a;\n    border-radius: 0 6px 6px 0;\n    padding: 20px 28px;\n    margin: 28px 0;\n    display: flex;\n    align-items: center;\n    gap: 20px;\n  }\n  .ms-warranty-badge {\n    background: #16a34a;\n    color: #ffffff;\n    font-size: 1em;\n    font-weight: 800;\n    padding: 10px 16px;\n    border-radius: 4px;\n    white-space: nowrap;\n  }\n  .ms-warranty p {\n    color: #cbd5e1;\n    font-size: 0.93em;\n    margin: 0;\n    line-height: 1.6;\n  }\n  .ms-warranty strong { color: #ffffff; }\n\n  \/* ── Fitment list ── *\/\n  .ms-fitment {\n    list-style: none;\n    margin: 14px 0 0 0;\n    padding: 0;\n    display: grid;\n    grid-template-columns: repeat(2, 1fr);\n    gap: 8px;\n  }\n  @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n  .ms-fitment li {\n    font-size: 0.93em;\n    color: #334155;\n    padding: 8px 12px;\n    background: #f0fdf4;\n    border-left: 3px solid #16a34a;\n    border-radius: 0 4px 4px 0;\n  }\n\n  \/* ── Divider ── *\/\n  .ms-divider {\n    border: none;\n    border-top: 1px solid #e2e8f0;\n    margin: 32px 0;\n  }\n\n  \/* ── Langboard callout ── *\/\n  .ms-langboard { font-weight: 700; color: #14532d; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ms-wrap\"\u003e\n\n  \u003c!-- HERO --\u003e\n  \u003cdiv class=\"ms-hero\"\u003e\n    \u003cspan class=\"ms-hero-badge\"\u003eMicro Series | M10-S WAV | Enclosure Only\u003c\/span\u003e\n    \u003ch2\u003e4.5 Inches Deep.\u003cbr\u003eBuilt for the Wavtech thinPRO 10.\u003c\/h2\u003e\n    \u003cp\u003eThe Wavtech thinPRO 10 runs 2.9 inches of mounting depth and 750 watts RMS, an output class that most shallow-mount enclosures are not built to handle structurally. The Proline X M10-S WAV is. Stack-fab Langboard Elite construction, 8\/32 threaded inserts, and a sealed 0.4 cubic foot chamber deliver what the thinPRO 10 needs: a rigid, correctly-sized acoustic environment in a box that fits where full-depth enclosures cannot go.\u003c\/p\u003e\n    \u003cdiv class=\"ms-hero-stats\"\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e0.40\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net Volume\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e4.5\"\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eTotal Depth\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e2.9\"\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eMax Mount Depth\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e750W\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eDriver RMS Rating\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n  \u003cdiv class=\"ms-alert\"\u003e\n    \u003cstrong\u003eEnclosure only.\u003c\/strong\u003e The Wavtech thinPRO 10 subwoofer is not included. This enclosure is designed for customers who already own or are separately purchasing the thinPRO10-2 or thinPRO10-4. Both impedance variants fit, the cutout and mounting geometry are identical.\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 1: Volume --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003e0.4 Cubic Feet: Within Spec, Intentionally Sized\u003c\/h3\u003e\n    \u003cp\u003eWavtech publishes a sealed volume sweet spot of 0.35 cubic feet for the thinPRO 10, with an acceptable range of 0.25–0.80 cubic feet. The M10-S WAV delivers 0.4 cubic feet of net internal volume. Slightly above the sweet spot, which shifts the system Qtc modestly lower and extends low-frequency output at the cost of a small amount of upper-bass damping. For most vehicle installs, particularly those where the enclosure is placed near a cabin boundary (under a seat, against a firewall, or floor-coupled in downfire orientation), this is the better-performing side of that tradeoff.\u003c\/p\u003e\n    \u003cp\u003eInternal volume is held to tolerance after accounting for driver displacement and stack-fab panel mass. The 0.4 figure is net, not gross box volume before subtracting hardware and baffle thickness. That distinction matters more in compact enclosures than anywhere else, because displacement represents a larger percentage of total internal space at smaller volumes.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 2: Construction --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eStack-Fab at 4.5 Inches: Structure Is the Constraint\u003c\/h3\u003e\n    \u003cp\u003eAt 4.5 inches of total depth, there is limited panel width available for rigidity. A flat single-panel wall at this depth has measurably less resistance to flex than the same wall at 7 or 8 inches of depth. Stack-fab construction addresses this directly, CNC-cut Langboard Elite MDF panels are layered and bonded in overlapping orientations, building up panel mass and eliminating single-layer joints at the critical walls. The result is a high-mass structure that does not flex at resonance frequencies even at the 750-watt RMS power levels the thinPRO 10 is capable of pulling.\u003c\/p\u003e\n    \u003cp\u003eEvery joint is CNC-machined to a dado fit before adhesive is applied. The mechanical interlock holds panel alignment under load. The adhesive seals permanently. Both together, neither alone, produce the airtight, acoustically inert enclosure this driver requires to perform at its rated spec.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WHY CARDS --\u003e\n  \u003cdiv class=\"ms-card-grid\"\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n      \u003ch4\u003e0.4 cu ft: Net Internal, Tolerance-Held\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eWavtech's acceptable sealed range for the thinPRO 10 is 0.25–0.80 cubic feet. The M10-S WAV lands at \u003cstrong\u003e0.4 cubic feet net\u003c\/strong\u003e: calculated after panel displacement, hardware, and baffle thickness are subtracted. Not approximated from external dimensions.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eDepth\u003c\/span\u003e\n      \u003ch4\u003e4.5\" Total: 2.9\" Driver Clearance with Margin\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe thinPRO 10 requires \u003cstrong\u003e2.9\" of mounting depth\u003c\/strong\u003e. The M10-S WAV provides 3.1\" of usable internal depth. Enough for the driver's rear motor structure with clearance at full excursion. No contact risk at rated power.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n      \u003ch4\u003e8\/32 Threaded Inserts: Machine Screws Included\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe baffle is fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e on the back face. Stainless 8\/32 square-bit machine screws are included. The driver threads into steel, not wood. No stripping, consistent clamping force, and the driver can be removed and reinstalled without degrading the mount.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eWiring\u003c\/span\u003e\n      \u003ch4\u003eGold-Plated Terminal Cup: Pre-Wired from the Factory\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eA \u003cstrong\u003ehigh-power gold-plated terminal cup\u003c\/strong\u003e is installed and pre-wired with \u003cstrong\u003e12-gauge speaker wire\u003c\/strong\u003e run internally to the driver location with stainless hardware. Connect your amplifier run to the terminal and mount the driver. No internal wiring work needed.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eConfiguration\u003c\/span\u003e\n      \u003ch4\u003eFront-Firing or Downfiring: Feet Included\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe M10-S WAV ships with \u003cstrong\u003erubber feet for downfiring installation\u003c\/strong\u003e. Use it front-firing in a standard orientation or flip it downward to couple bass output with the vehicle floor. Downfiring is particularly effective in truck cabs and SUVs where floor coupling produces a more distributed low-frequency response throughout the cabin.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eStructure\u003c\/span\u003e\n      \u003ch4\u003eStack-Fab Langboard Elite: Built for 750W RMS\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe thinPRO 10 is rated at 750 watts RMS. Well above what most compact enclosures are built to withstand structurally. \u003cstrong\u003eStack-fab Langboard Elite MDF\u003c\/strong\u003e with dado joinery and rounded external corners produces a high-mass, low-resonance structure that stays inert at the power levels this driver can generate.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eAcoustic\u003c\/span\u003e\n      \u003ch4\u003ePolyfill Pre-Installed\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003ePolyfill is packed and installed at the factory. It acoustically increases effective internal volume, extending low-frequency output without adding external size. In a 0.4 cubic foot enclosure, this is a meaningful tuning step, not a cosmetic addition. It is built into the manufacturing process, not left to the installer.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eFitment\u003c\/span\u003e\n      \u003ch4\u003eDirect-Fit Cutout for the thinPRO 10\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe baffle cutout is machined specifically for the \u003cstrong\u003eWavtech thinPRO 10 mounting geometry\u003c\/strong\u003e. The thinPRO 10 uses a standard round mounting flange, the cutout diameter is precision-matched to that spec. Flush-mount seating is confirmed at the factory. No shimming, trimming, or fitting required.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- HIGHLIGHT --\u003e\n  \u003cdiv class=\"ms-highlight\"\u003e\n    \u003ch3\u003eReady to Mount. Ready to Wire.\u003c\/h3\u003e\n    \u003cp\u003eThe M10-S WAV ships fully prepped. The \u003cstrong\u003egold-plated terminal cup\u003c\/strong\u003e is installed and pre-wired to the driver location with 12-gauge wire. Connect your amplifier run and that side is done. The baffle uses \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless square-bit machine screws included, driver mounts to steel, not MDF. \u003cstrong\u003eRubber feet are included\u003c\/strong\u003e for downfiring installations. No additional hardware required for either configuration.\u003c\/p\u003e\n    \u003ch3\u003eImpedance Options: thinPRO10-2 and thinPRO10-4\u003c\/h3\u003e\n    \u003cp\u003eThe Wavtech thinPRO 10 is available in two impedance variants: the \u003cstrong\u003ethinPRO10-2\u003c\/strong\u003e (single 2-ohm voice coil) and the \u003cstrong\u003ethinPRO10-4\u003c\/strong\u003e (single 4-ohm voice coil). Both variants share identical physical dimensions and fit this enclosure. Choose the impedance that matches your amplifier's stable load. The thinPRO10-2 presents a 2-ohm load directly; the thinPRO10-4 presents a 4-ohm load. Neither variant requires wiring configuration, single voice coil, single connection.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FITMENT --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n    \u003cp\u003eAt 24\" × 12.75\" × 4.5\", the M10-S WAV opens up install locations that rule out virtually every conventional sealed 10\" build. Common placements:\u003c\/p\u003e\n    \u003cul class=\"ms-fitment\"\u003e\n      \u003cli\u003eUnder-seat: extended cab and crew cab trucks\u003c\/li\u003e\n      \u003cli\u003eBehind-seat: full-size truck cabs (front-firing or downfire)\u003c\/li\u003e\n      \u003cli\u003eTrunk corners: compact and mid-size sedans\u003c\/li\u003e\n      \u003cli\u003eSide cargo panels: SUVs and crossovers\u003c\/li\u003e\n      \u003cli\u003eHatch floor: sports cars and hatchbacks\u003c\/li\u003e\n      \u003cli\u003eSpare tire well: select SUV and crossover platforms\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WARRANTY --\u003e\n  \u003cdiv class=\"ms-warranty\"\u003e\n    \u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n    \u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures are covered by a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Enclosures are built in our Tennessee facility and inspected before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003chr class=\"ms-divider\"\u003e\n\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n    \u003cp\u003eEvery Proline X Micro Series enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee on ShopSabre CNC routers. Internal volume, dado joint depth, cutout diameter, and terminal placement are held to spec on every unit. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e is used across the full Micro Series build, a named, mill-documented board with published density specifications, not a generic \"premium MDF\" claim.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":42708718256217,"sku":"M10-S WAV","price":219.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-m10-s-wav-sealed-10-subwoofer-enclosure-wavtech-thinpro-10subwoofer-enclosuresproline-x-4189528.webp?v=1761970807"},{"product_id":"proline-x-micro-series-sealed-10-enclosure-loaded-wavtech-thinpro-10","title":"Proline X Single 10\" Sealed Micro Series System | Loaded with Wavtech thinPRO10","description":"\u003cstyle\u003e\n.pl-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#cbd5e1;max-width:1100px;margin:0 auto;background:#020617;}\n.pl-wrap *{box-sizing:border-box;}\n.pl-hero{background:linear-gradient(135deg,#020617 0%,#2e1065 100%);padding:54px 36px;text-align:center;color:#fff;}\n.pl-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 12px;color:#fff;}\n.pl-hero p{font-size:1.1em;font-weight:300;opacity:.93;margin:0 0 22px;color:#cbd5e1;}\n.pl-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;}\n.pl-badge{background:rgba(139,92,246,.18);border:1px solid #8b5cf6;color:#c4b5fd;padding:7px 16px;border-radius:18px;font-size:.8em;font-weight:600;letter-spacing:.4px;}\n.pl-stats{display:flex;flex-wrap:wrap;background:#0f172a;}\n.pl-stat{flex:1 1 200px;text-align:center;padding:26px 16px;border-right:1px solid #1e293b;border-bottom:1px solid #1e293b;}\n.pl-stat .n{display:block;font-size:1.6em;font-weight:800;color:#a78bfa;}\n.pl-stat 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strong{color:#fff;}\n.pl-enc{background:#0f172a;color:#cbd5e1;padding:42px 36px;border-bottom:1px solid #1e293b;}\n.pl-enc h3{color:#fff;font-size:1.45em;font-weight:700;margin:0 0 14px;border-left:4px solid #8b5cf6;padding-left:14px;}\n.pl-enc p{margin:0 0 14px;color:#cbd5e1;}\n.pl-enc-card{background:#1e293b;border:1px solid #334155;border-radius:8px;overflow:hidden;margin:18px 0;}\n.pl-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#c4b5fd;background:#2e1065;}\n.pl-enc-table{width:100%;border-collapse:collapse;}\n.pl-enc-table th{background:#020617;color:#94a3b8;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #334155;}\n.pl-enc-table td{padding:12px 14px;border-bottom:1px solid #1e293b;color:#cbd5e1;font-size:.95em;}\n.pl-enc-table tr:last-child td{border-bottom:none;}\n.pl-opt td{background:#2e1065;color:#fff;font-weight:600;}\n.pl-char{display:block;font-size:.78em;color:#94a3b8;font-weight:400;margin-top:2px;}\n.pl-opt .pl-char{color:#c4b5fd;}\n.pl-graph{background:#020617;border:1px solid #334155;border-radius:8px;padding:14px;margin:18px 0;}\n.pl-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#94a3b8;margin:0 0 10px;}\n.pl-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px;}\n.pl-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#94a3b8;}\n.pl-sw{width:22px;height:3px;border-radius:2px;display:inline-block;}\n.pl-note{background:#1e293b;border:1px solid #334155;border-radius:8px;padding:14px 16px;margin-top:6px;}\n.pl-note p{margin:0;color:#cbd5e1;font-size:13.5px;line-height:1.6;}\n.pl-link{color:#a78bfa;text-decoration:underline;}\n.pl-cta{background:linear-gradient(135deg,#020617 0%,#2e1065 100%);padding:40px 36px;text-align:center;color:#fff;}\n.pl-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0;}\n.pl-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#cbd5e1;}\n@media(max-width:600px){.pl-hero h2{font-size:1.7em;}.pl-section,.pl-enc,.pl-cta,.pl-hero{padding-left:20px;padding-right:20px;}}\n\u003c\/style\u003e\n\u003cdiv class=\"pl-wrap\"\u003e\n\n\u003cdiv class=\"pl-hero\"\u003e\n\u003ch2\u003eProline X Micro Series Enclosure for the Wavtech thinPRO 10\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Wavtech thinPRO 10\u003c\/p\u003e\n\u003cdiv class=\"pl-badges\"\u003e\n\u003cspan class=\"pl-badge\"\u003eCNC Stack-Fab\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003e0.40 cu ft Net\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eFits Wavtech thinPRO 10\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-stats\"\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.40\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.822-0.870\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e41.5-44.5 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-stat\"\u003e\n\u003cspan class=\"n\"\u003e2.875 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ethinPRO 10 mounting depth\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eBuilt Around the Wavtech thinPRO 10\u003c\/h3\u003e\n\u003cp\u003eNothing about this box is generic. Every layer is cut to the thinPRO 10's published sealed target, with the baffle bored to the thinPRO 10's 9.0625 in cutout with 8\/32 threaded inserts set on the back face, and clearance cut for its 2.875 in mounting depth.\u003c\/p\u003e\n\u003cp\u003eThe thinPRO 10 carries a published \u003cstrong\u003eFs of 31 Hz, Qts of 0.55 and Vas of 17 litres\u003c\/strong\u003e, and an EBP of 50, which puts it in transition enclosure territory. We ran the alignment math on that data and built the box to land where it belongs.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.40 cubic feet net\u003c\/strong\u003e, against a published recommendation of 0.35 cu ft (D2). The volume quoted is true net internal airspace, measured after the walls, bracing and driver displacement are accounted for.\u003c\/p\u003e\n\u003cdiv class=\"pl-highlight\"\u003e\n\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated by summing\neach CNC cut layer's opening, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eProline X Micro Series Construction\u003c\/h3\u003e\n\u003cp\u003eThis enclosure is stack fabricated on our ShopSabre routers from Langboard Elite 3\/4 inch MDF,\na dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE.\nEvery layer is a precision cut ring and the stacked layers do the joining themselves, so there is no butt joint or dado to flex or leak. Dowel reinforcement runs between layers as tension hardware only.\u003c\/p\u003e\n\u003cdiv class=\"pl-grid\"\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003eThreaded Inserts, Not Wood Screws\u003c\/h4\u003e\n\u003cp\u003e8\/32 threaded inserts are set on the backside of the baffle so the driver mounts on machine screws. Pull it a dozen times and the threads are still there.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired internally with \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. No CCA anywhere in the build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pl-card\"\u003e\n\u003ch4\u003eDamped and Finished\u003c\/h4\u003e\n\u003cp\u003ePolyfill is pre-installed to smooth the in box response, and the shell is wrapped in plush black carpet. Built in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-section\"\u003e\n\u003ch3\u003eEnclosure Only or Loaded\u003c\/h3\u003e\n\u003cp\u003eOrder the enclosure bare and mount your own thinPRO 10, or order it loaded and we mount the driver, dress the wiring and ship it ready to bolt in.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-enc\"\u003e\n\u003ch3\u003eSealed Enclosure Performance: Pre-Calculated\u003c\/h3\u003e\n\u003cp\u003eUsing the published Thiele Small parameters for the Wavtech thinPRO 10, here is the predicted Qtc,\nsystem resonance (Fc) and F3 rolloff for this enclosure. Calculated with the same formulas\nas the Audio Intensity Sealed Box Calculator.\u003c\/p\u003e\n\n\u003cdiv class=\"pl-enc-card\"\u003e\n\u003cdiv class=\"pl-enc-head\"\u003eWavtech thinPRO 10 thinPRO10-2  |  Qts 0.55  |  Fs 31 Hz  |  Vas 17 L\u003c\/div\u003e\n\u003ctable class=\"pl-enc-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eEnclosure Size\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003eFc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pl-opt\"\u003e\n\u003ctd\u003e0.40 cu ft \u003cspan class=\"pl-char\"\u003eas built\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.870\u003c\/td\u003e\n\u003ctd\u003e49.0 Hz\u003c\/td\u003e\n\u003ctd\u003e41.5 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-graph\"\u003e\n\u003cp class=\"pl-graph-title\"\u003eWavtech thinPRO 10 Frequency Response | Sealed, 0.40 cu ft\u003c\/p\u003e\n\u003csvg viewbox=\"0 0 680 300\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:100%;height:auto;display:block;\"\u003e\n\u003crect x=\"0\" y=\"0\" width=\"680\" height=\"300\" fill=\"#0f172a\"\u003e\u003c\/rect\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"270.0\" y2=\"270.0\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"274.0\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e-12dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"219.2\" y2=\"219.2\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"223.2\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e-9dB\u003c\/text\u003e\n\u003cline x1=\"42\" x2=\"664\" y1=\"168.4\" y2=\"168.4\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"36\" y=\"172.4\" text-anchor=\"end\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, 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opacity=\"0.85\"\u003e\u003c\/line\u003e\n\u003ctext x=\"660\" y=\"112.6\" text-anchor=\"end\" font-size=\"10\" fill=\"#a78bfa\" font-family=\"Arial, sans-serif\"\u003e-3dB\u003c\/text\u003e\n\u003cline x1=\"42.0\" x2=\"42.0\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"42.0\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e20Hz\u003c\/text\u003e\n\u003cline x1=\"135.1\" x2=\"135.1\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"135.1\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e30Hz\u003c\/text\u003e\n\u003cline x1=\"252.5\" x2=\"252.5\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"252.5\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e50Hz\u003c\/text\u003e\n\u003cline x1=\"411.7\" x2=\"411.7\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"411.7\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e100Hz\u003c\/text\u003e\n\u003cline x1=\"570.9\" x2=\"570.9\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"570.9\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e200Hz\u003c\/text\u003e\n\u003cline x1=\"664.0\" x2=\"664.0\" y1=\"16\" y2=\"270\" stroke=\"#1e293b\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003ctext x=\"664.0\" y=\"286\" text-anchor=\"middle\" font-size=\"10\" fill=\"#64748b\" font-family=\"Arial, sans-serif\"\u003e300Hz\u003c\/text\u003e\n\u003crect x=\"42\" y=\"16\" width=\"622\" height=\"254\" fill=\"none\" stroke=\"#334155\" 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583.1,64.3 585.2,64.3 587.3,64.4 589.4,64.4 591.4,64.4 593.5,64.5 595.6,64.5 597.7,64.6 599.7,64.6 601.8,64.6 603.9,64.7 605.9,64.7 608.0,64.7 610.1,64.8 612.2,64.8 614.2,64.8 616.3,64.9 618.4,64.9 620.5,64.9 622.5,65.0 624.6,65.0 626.7,65.0 628.8,65.1 630.8,65.1 632.9,65.1 635.0,65.2 637.0,65.2 639.1,65.2 641.2,65.2 643.3,65.3 645.3,65.3 647.4,65.3 649.5,65.3 651.6,65.4 653.6,65.4 655.7,65.4 657.8,65.4 659.9,65.5 661.9,65.5 664.0,65.5\" fill=\"none\" stroke=\"#a78bfa\" stroke-width=\"2.4\" stroke-linejoin=\"round\"\u003e\u003c\/polyline\u003e\n\u003c\/svg\u003e\n\u003cdiv class=\"pl-legend\"\u003e\n\u003cspan class=\"pl-legend-item\"\u003e\u003cspan class=\"pl-sw\" style=\"background:#a78bfa;\"\u003e\u003c\/span\u003e0.40 cu ft (Qtc 0.870)\u003c\/span\u003e\n\u003cspan class=\"pl-legend-item\"\u003e\u003cspan class=\"pl-sw\" style=\"background:#8b5cf6;\"\u003e\u003c\/span\u003e-3dB reference\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-note\"\u003e\n\u003cp\u003e\u003cstrong style=\"color:#a78bfa;\"\u003eNote on coil choice:\u003c\/strong\u003e The figures above are the thinPRO10-2 set. The thinPRO10-4 carries Qts 0.52 and Vas 17 litres, and a different Fs of 32 Hz, which in this same 0.40 cubic foot volume lands at \u003cstrong\u003eQtc 0.822, Fc 50.6 Hz and F3 44.5 Hz\u003c\/strong\u003e. Close enough that either coil suits the box. \u003ca class=\"pl-link\" href=\"\/pages\/sealed-box-calculator\"\u003eRun your own numbers in the Sealed Box Calculator.\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pl-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eSelect your configuration above. This enclosure ships free to the lower 48 with a 2 year limited warranty, built one at a time in Tullahoma, Tennessee. Ordered loaded, the thinPRO 10 carries its own 1 year manufacturer warranty through authorized dealers.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Single 4 ohm","offer_id":42708993245273,"sku":"M10-S Wav Loaded 4 ohm","price":849.99,"currency_code":"USD","in_stock":false},{"title":"Single 2 Ohm","offer_id":42708993278041,"sku":"M10-S Wav Loaded 2 ohm","price":849.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-m10-s-wav-loaded-wavtech-thinpro-10-subwoofer-sealed-enclosureenclosed-subwooferproline-x-6621572.png?v=1761970816"},{"product_id":"proline-x-micro-series-enclosure-fits-jl-10tw3","title":"Proline X Micro Series 10\" Sealed Enclosure - Fits JL Audio 10TW3","description":"\u003c!-- ============================================================\n     PROLINE X MICRO SERIES — JL AUDIO 10TW3\n     PRODUCT DESCRIPTION HTML\n     Color system: Green (#16a34a primary)\n     Enclosure-only SKU\n     ============================================================ --\u003e\n\n\u003cstyle\u003e\n  .ms-wrap * { box-sizing: border-box; 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}\n\n  \/* ── Warranty bar ── *\/\n  .ms-warranty {\n    background: #0f172a;\n    border-left: 5px solid #16a34a;\n    border-radius: 0 6px 6px 0;\n    padding: 20px 28px;\n    margin: 28px 0;\n    display: flex;\n    align-items: center;\n    gap: 20px;\n  }\n  .ms-warranty-badge {\n    background: #16a34a;\n    color: #ffffff;\n    font-size: 1em;\n    font-weight: 800;\n    padding: 10px 16px;\n    border-radius: 4px;\n    white-space: nowrap;\n  }\n  .ms-warranty p {\n    color: #cbd5e1;\n    font-size: 0.93em;\n    margin: 0;\n    line-height: 1.6;\n  }\n  .ms-warranty strong { color: #ffffff; }\n\n  \/* ── Fitment list ── *\/\n  .ms-fitment {\n    list-style: none;\n    margin: 14px 0 0 0;\n    padding: 0;\n    display: grid;\n    grid-template-columns: repeat(2, 1fr);\n    gap: 8px;\n  }\n  @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n  .ms-fitment li {\n    font-size: 0.93em;\n    color: #334155;\n    padding: 8px 12px;\n    background: #f0fdf4;\n    border-left: 3px solid #16a34a;\n    border-radius: 0 4px 4px 0;\n  }\n\n  \/* ── Divider ── *\/\n  .ms-divider {\n    border: none;\n    border-top: 1px solid #e2e8f0;\n    margin: 32px 0;\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ms-wrap\"\u003e\n\n  \u003c!-- HERO --\u003e\n  \u003cdiv class=\"ms-hero\"\u003e\n    \u003cspan class=\"ms-hero-badge\"\u003eMicro Series | Enclosure Only\u003c\/span\u003e\n    \u003ch2\u003eBuilt Around the JL Audio 10TW3.\u003cbr\u003eNot Adapted to It.\u003c\/h2\u003e\n    \u003cp\u003eThe JL Audio 10TW3-D4 has one of the most precisely engineered shallow-mount motor structures in the industry. That precision only pays off inside an enclosure engineered to match it. The Proline X Micro Series enclosure for the 10TW3 delivers an exact 0.50 cubic foot sealed environment, the volume JL Audio specifies for optimal acoustic damping, in a 5.25\" total depth that fits where conventional builds cannot.\u003c\/p\u003e\n    \u003cdiv class=\"ms-hero-stats\"\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e0.50\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net Volume\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e5.25\"\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eTotal Depth\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e3.25\"\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eMax Mount Depth\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003eCNC\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCut in Tennessee\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n  \u003cdiv class=\"ms-alert\"\u003e\n    \u003cstrong\u003eEnclosure only.\u003c\/strong\u003e The JL Audio 10TW3-D4 subwoofer is not included. This enclosure is designed for customers who already own or are separately purchasing the 10TW3-D4 or 10TW3-D8.\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 1: Why This Enclosure --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eWhy the Enclosure Matters as Much as the Driver\u003c\/h3\u003e\n    \u003cp\u003eThe JL Audio 10TW3-D4 has a free-air resonance of 32.3 Hz, a Qts of 0.62, and a Vas of 19.82 liters. Those numbers tell you exactly what this driver needs from its enclosure: a sealed box in the 0.50 cubic foot range produces a system Qtc near 0.96, a slightly elevated damping curve that gives the 10TW3 the extension and transient control it was designed to deliver in compact sealed installs.\u003c\/p\u003e\n    \u003cp\u003eGeneric \"universal\" thin-box enclosures are built to an approximate size and sold across multiple driver models. Internal volume tolerances are loose, joints are glued without mechanical locking, and the panel mass is rarely sufficient to stay acoustically inert at high excursion levels. This enclosure is built to a defined spec for one driver. Internal volume is held to within 0.01 cubic foot. Every panel joint is CNC-cut for a mechanical dado fit before adhesive is applied. The result is a box that behaves the way the modeling says it should, consistently, from unit to unit.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 2: Stack Fab Construction --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eStack Fab Construction: Why Depth Is Not the Enemy\u003c\/h3\u003e\n    \u003cp\u003eThin enclosures have a structural problem that standard-depth boxes don't: less panel depth means less rigidity, which means more panel resonance. The Proline X Micro Series addresses this directly through stack-fab layering, CNC-cut MDF panels are layered and bonded in overlapping orientations so that no glue joint runs the full depth of any critical wall. The result is a high-mass, mechanically locked enclosure that resists flex at the panel level, not just at the corners.\u003c\/p\u003e\n    \u003cp\u003eEvery interior dimension is machined to maintain 0.50 cubic feet of net internal volume after accounting for driver displacement, terminal hardware, and polyfill. Polyfill is pre-installed from the factory, it increases the effective acoustic volume by slowing the speed of sound inside the enclosure, which extends low-frequency performance without adding external size.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WHY CARDS --\u003e\n  \u003cdiv class=\"ms-card-grid\"\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n      \u003ch4\u003eSpec-Matched to JL Audio's Published Data\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eJL Audio publishes an optimum sealed volume of \u003cstrong\u003e0.50 cubic feet\u003c\/strong\u003e for the 10TW3. This enclosure delivers exactly that, not approximately, not \"up to.\" Internal volume is machined to tolerance so the driver's Qtc lands where the T\/S parameters predict it.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eDepth\u003c\/span\u003e\n      \u003ch4\u003e5.25\" Total: Driver Clears with Margin\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe 10TW3 requires \u003cstrong\u003e3.25\" of mounting depth\u003c\/strong\u003e. The Micro Series provides 4.5\" of usable internal depth, enough for full driver clearance including the rear magnet structure, with no contact risk at full excursion.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eStructure\u003c\/span\u003e\n      \u003ch4\u003eDado Joinery: No Joint Relies on Glue Alone\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eEvery panel-to-panel connection uses CNC-cut interlocking dado slots. The mechanical fit holds the joint in alignment under load. Adhesive seals the joint permanently. Neither alone is sufficient. Both together create a connection that will not loosen, shift, or leak under sustained high-excursion use.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eWiring\u003c\/span\u003e\n      \u003ch4\u003eGold-Plated Terminal Cup: Pre-Wired from the Factory\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe enclosure ships with a \u003cstrong\u003egold-plated spring-loaded terminal cup\u003c\/strong\u003e already installed and pre-wired internally with \u003cstrong\u003e12-gauge oxygen-free copper\u003c\/strong\u003e run directly to the driver mounting location. Connect your amplifier run to the terminal cup, mount the driver to the threaded inserts, and you are done. No internal wiring work required.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eAcoustic\u003c\/span\u003e\n      \u003ch4\u003eFactory-Installed Polyfill\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003ePolyfill is packed and installed at the factory. It acoustically increases the effective volume of the enclosure, extending the 10TW3's low-frequency output without changing the external footprint. This is not a cosmetic addition. It is an acoustic tuning step built into the manufacturing process.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eFitment\u003c\/span\u003e\n      \u003ch4\u003e9.625\" Cutout: Matches JL Audio Tab-Ear Spec\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe 10TW3 uses a tab-ear mounting system with a \u003cstrong\u003e9.625\" cutout diameter\u003c\/strong\u003e: this enclosure is machined to that exact spec. The mounting hole is not a generic 10\" cutout trimmed down. The baffle is cut for this driver specifically.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n      \u003ch4\u003eThreaded Inserts, Machine Screw Mounting, Not Wood Screws\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe back side of the baffle is fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e. The 10TW3 mounts with machine screws threading into steel inserts, not wood screws biting into MDF. Machine screw mounting does not strip out under repeated removal, maintains consistent clamping force across all mounting points, and holds the driver flush against the baffle gasket without over-torquing any single corner.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- HIGHLIGHT: Installer Note --\u003e\n  \u003cdiv class=\"ms-highlight\"\u003e\n    \u003ch3\u003eReady to Mount. Ready to Wire.\u003c\/h3\u003e\n    \u003cp\u003eThe Micro Series enclosure ships fully prepped for installation. The \u003cstrong\u003egold-plated spring-loaded terminal cup\u003c\/strong\u003e is installed and pre-wired to the driver location with 12-gauge OFC. Connect your amplifier run and you are done on the wiring side. The baffle is fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e on the back face, the 10TW3 mounts with machine screws into steel inserts, not wood screws into MDF. No risk of stripped mounting holes on a future driver swap.\u003c\/p\u003e\n    \u003ch3 style=\"margin-top:18px;\"\u003eA Note on Impedance Options\u003c\/h3\u003e\n    \u003cp\u003eThe JL Audio 10TW3 is available in two impedance configurations: the \u003cstrong\u003e10TW3-D4\u003c\/strong\u003e (dual 4-ohm voice coils) and the \u003cstrong\u003e10TW3-D8\u003c\/strong\u003e (dual 8-ohm voice coils). This enclosure fits both. Cutout diameter, mounting depth, and internal volume are identical across D4 and D8 builds.\u003c\/p\u003e\n    \u003cp\u003eWith a D4: wire parallel for a 2-ohm load or series for an 8-ohm load. With a D8: wire parallel for a 4-ohm load or series for a 16-ohm load. Most amplifier pairings use the D4 wired to 2 ohms. Confirm your amplifier's stable impedance before selecting the driver variant.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FITMENT SECTION --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n    \u003cp\u003eAt 21.5\" × 14.5\" × 5.25\", this enclosure fits in spaces that rule out virtually every conventional sealed build. Common install locations:\u003c\/p\u003e\n    \u003cul class=\"ms-fitment\"\u003e\n      \u003cli\u003eUnder-seat: extended cab and crew cab trucks\u003c\/li\u003e\n      \u003cli\u003eTrunk corners: compact and mid-size sedans\u003c\/li\u003e\n      \u003cli\u003eSide cargo panels: SUVs and crossovers\u003c\/li\u003e\n      \u003cli\u003eBehind-seat: full-size truck cabs\u003c\/li\u003e\n      \u003cli\u003eHatch floor: sports cars and hatchbacks\u003c\/li\u003e\n      \u003cli\u003eUnder-bed storage: utility and work vehicles\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WARRANTY --\u003e\n  \u003cdiv class=\"ms-warranty\"\u003e\n    \u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n    \u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures are covered by a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Enclosures are built in our Tennessee facility and inspected before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003chr class=\"ms-divider\"\u003e\n\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n    \u003cp\u003eEvery Proline X Micro Series enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee. Panels are cut on ShopSabre CNC routers to maintain dimensional tolerances that manual fabrication cannot achieve consistently. Internal volume, dado joint depth, cutout diameter, and terminal cup placement are all held to spec on every unit, not just on the sample used to generate the product listing. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e is used across the full Micro Series build, a named, mill-documented board with published density specifications, not a generic \"premium MDF\" claim.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43075494641753,"sku":"M10-S JL","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/jl-audio-10tw3-d4-in-proline-x-micro-series-enclosureenclosed-subwooferproline-x-745238.jpg?v=1774209158"},{"product_id":"proline-x-micro-series-sealed-dual-12-enclosure-wavtech-thinpro-12-enclosure-only","title":"Proline-X Micro Series Sealed Dual 12\" Enclosure | Wavtech thinPRO12","description":"\u003c!-- ============================================================\n     PROLINE X MICRO SERIES — M12D-S WAV\n     DUAL WAVTECH thinPRO 12 | SEALED | ENCLOSURE ONLY\n     Color system: Green (#16a34a primary)\n     SKU: M12D-S WAV No Acrylic\n     ============================================================ --\u003e\n\n\u003cstyle\u003e\n  .ms-wrap * { box-sizing: border-box; }\n  .ms-wrap { font-family: inherit; color: #1e293b; line-height: 1.7; max-width: 1200px; margin: 0 auto; }\n\n  .ms-hero {\n    background: linear-gradient(135deg, #0f172a 0%, #14532d 100%);\n    border-radius: 8px;\n    padding: 40px 36px;\n    margin-bottom: 32px;\n    position: relative;\n    overflow: hidden;\n  }\n  .ms-hero::before {\n    content: '';\n    position: absolute;\n    top: -40px; right: -40px;\n    width: 220px; height: 220px;\n    background: rgba(22,163,74,0.12);\n    border-radius: 50%;\n  }\n  .ms-hero-badge {\n    display: inline-block;\n    background: transparent;\n    border: 2px solid #16a34a;\n    color: #86efac;\n    font-size: 0.75em;\n    font-weight: 700;\n    letter-spacing: 0.12em;\n    text-transform: uppercase;\n    padding: 4px 14px;\n    border-radius: 20px;\n    margin-bottom: 16px;\n  }\n  .ms-hero h2 { color: #ffffff; font-size: 1.65em; font-weight: 800; margin: 0 0 14px 0; line-height: 1.25; }\n  .ms-hero p { color: #cbd5e1; font-size: 1em; margin: 0 0 24px 0; max-width: 660px; line-height: 1.7; }\n  .ms-hero-stats { display: flex; gap: 28px; flex-wrap: wrap; }\n  .ms-stat { text-align: center; }\n  .ms-stat-num { display: block; color: #86efac; font-size: 1.5em; font-weight: 800; line-height: 1; }\n  .ms-stat-label { display: block; color: #94a3b8; font-size: 0.72em; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; }\n\n  .ms-section {\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-top: 4px solid #16a34a;\n    border-radius: 6px;\n    padding: 28px 32px;\n    margin-bottom: 24px;\n  }\n  .ms-section:nth-child(odd) { background: #f8fafc; }\n  .ms-section h3 { color: #14532d; font-size: 1.15em; font-weight: 700; margin: 0 0 14px 0; }\n  .ms-section p { color: #334155; font-size: 0.97em; margin: 0 0 12px 0; }\n  .ms-section p:last-child { margin-bottom: 0; }\n\n  .ms-highlight {\n    background: #f0fdf4;\n    border-left: 5px solid #16a34a;\n    padding: 22px 28px;\n    margin: 28px 0;\n    border-radius: 0 6px 6px 0;\n  }\n  .ms-highlight h3 { color: #14532d; margin: 0 0 10px 0; font-size: 1.1em; font-weight: 700; }\n  .ms-highlight h3 + h3 { margin-top: 18px; }\n  .ms-highlight p { margin-bottom: 10px; color: #1e293b; font-size: 0.97em; }\n  .ms-highlight p:last-child { margin-bottom: 0; }\n\n  .ms-alert {\n    background: #dcfce7;\n    border: 1px solid #16a34a;\n    border-radius: 6px;\n    padding: 14px 18px;\n    margin: 20px 0;\n    font-size: 0.93em;\n    color: #166534;\n  }\n  .ms-alert strong { color: #14532d; }\n\n  .ms-wiring {\n    background: #0f172a;\n    border-radius: 6px;\n    padding: 24px 28px;\n    margin: 24px 0;\n  }\n  .ms-wiring h3 { color: #86efac; font-size: 1em; font-weight: 700; margin: 0 0 16px 0; letter-spacing: 0.05em; text-transform: uppercase; }\n  .ms-wiring-row {\n    display: flex;\n    align-items: center;\n    gap: 14px;\n    padding: 10px 0;\n    border-bottom: 1px solid #1e293b;\n  }\n  .ms-wiring-row:last-child { border-bottom: none; padding-bottom: 0; }\n  .ms-wiring-load {\n    background: #16a34a;\n    color: #ffffff;\n    font-size: 1.1em;\n    font-weight: 800;\n    padding: 8px 16px;\n    border-radius: 4px;\n    min-width: 60px;\n    text-align: center;\n  }\n  .ms-wiring-desc { color: #cbd5e1; font-size: 0.93em; line-height: 1.5; }\n  .ms-wiring-desc strong { color: #ffffff; }\n\n  .ms-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 24px 0; }\n  @media (max-width: 600px) { .ms-card-grid { grid-template-columns: 1fr; } }\n  .ms-card {\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-top: 3px solid #16a34a;\n    border-radius: 6px;\n    padding: 22px;\n  }\n  .ms-card-label {\n    display: inline-block;\n    background: #16a34a;\n    color: #ffffff;\n    font-size: 0.68em;\n    font-weight: 700;\n    letter-spacing: 0.1em;\n    text-transform: uppercase;\n    padding: 3px 10px;\n    border-radius: 3px;\n    margin-bottom: 10px;\n  }\n  .ms-card h4 { color: #14532d; font-size: 1em; font-weight: 700; margin: 0 0 10px 0; }\n  .ms-card-divider { height: 2px; background: #16a34a; width: 32px; margin-bottom: 12px; border-radius: 2px; }\n  .ms-card p { font-size: 0.93em; color: #475569; margin: 0; line-height: 1.65; }\n  .ms-card p strong { color: #14532d; }\n\n  .ms-warranty {\n    background: #0f172a;\n    border-left: 5px solid #16a34a;\n    border-radius: 0 6px 6px 0;\n    padding: 20px 28px;\n    margin: 28px 0;\n    display: flex;\n    align-items: center;\n    gap: 20px;\n  }\n  .ms-warranty-badge { background: #16a34a; color: #ffffff; font-size: 1em; font-weight: 800; padding: 10px 16px; border-radius: 4px; white-space: nowrap; }\n  .ms-warranty p { color: #cbd5e1; font-size: 0.93em; margin: 0; line-height: 1.6; }\n  .ms-warranty strong { color: #ffffff; }\n\n  .ms-fitment { list-style: none; margin: 14px 0 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }\n  @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n  .ms-fitment li { font-size: 0.93em; color: #334155; padding: 8px 12px; background: #f0fdf4; border-left: 3px solid #16a34a; border-radius: 0 4px 4px 0; }\n\n  .ms-divider { border: none; border-top: 1px solid #e2e8f0; margin: 32px 0; }\n  .ms-langboard { font-weight: 700; color: #14532d; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ms-wrap\"\u003e\n\n  \u003c!-- HERO --\u003e\n  \u003cdiv class=\"ms-hero\"\u003e\n    \u003cspan class=\"ms-hero-badge\"\u003eMicro Series | M12D-S WAV | Enclosure Only\u003c\/span\u003e\n    \u003ch2\u003eDual 12\". 8\" Deep.\u003cbr\u003e0.60 cu ft Per Chamber.\u003c\/h2\u003e\n    \u003cp\u003eTwo Wavtech thinPRO 12 drivers. Two isolated sealed chambers. Each chamber holds exactly 0.60 cubic feet. Wavtech's published optimal sealed volume for this driver. The M12D-S WAV delivers dual 12\" output in 8 inches of total depth. A conventional dual 12\" sealed box at this volume runs 14–18 inches deep. This one fits behind the seat of a full-size truck.\u003c\/p\u003e\n    \u003cdiv class=\"ms-hero-stats\"\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e1.20\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net Total\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e0.60\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCu Ft Per Chamber\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e8\"\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eTotal Depth\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e1,500W\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCombined RMS Rating\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n  \u003cdiv class=\"ms-alert\"\u003e\n    \u003cstrong\u003eEnclosure only.\u003c\/strong\u003e Wavtech thinPRO 12 subwoofers are not included and must be purchased separately. This enclosure accepts both the thinPRO12-2 (Single 2Ω) and thinPRO12-4 (Single 4Ω). Select the variant that matches your amplifier's stable impedance before ordering. Final load depends on which variant you choose and how they are wired.\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 1: Volume --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003e0.60 cu ft Per Chamber, Calculated Per Driver, Not Split From a Single Box\u003c\/h3\u003e\n    \u003cp\u003eRunning two thinPRO 12 drivers in a shared enclosure is not the same as doubling a single-driver box. Each driver needs its own isolated airspace to load correctly. The M12D-S WAV uses a dual-chamber construction, each driver occupies a fully sealed, acoustically isolated 0.60 cubic foot chamber. That is Wavtech's published optimal sealed volume for the thinPRO 12. Neither driver is sharing airspace with the other, and neither chamber is being compromised to hit a total volume number.\u003c\/p\u003e\n    \u003cp\u003eThe 1.20 cubic feet total net volume is calculated after driver displacement, double-layer baffle material, and internal chamber divider are subtracted. What each driver sees is 0.60 cubic feet of net sealed airspace, the same volume a single M12-S WAV delivers, replicated twice inside one enclosure footprint.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 2: Construction --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003e1.5\" Double-Layer Baffle: V-Groove and Dado Joinery Throughout\u003c\/h3\u003e\n    \u003cp\u003eThe front baffle is a double-layer stack-fab build, two CNC-cut Langboard Elite panels bonded to 1.5 inches total. Two thinPRO 12 drivers at 750 watts RMS each generate 1,500 watts of combined excursion load at the baffle simultaneously. A single 3\/4\" panel at this output level resonates. Two bonded layers do not.\u003c\/p\u003e\n    \u003cp\u003eThe rest of the enclosure uses both V-groove and dado joinery, V-groove at the exterior panel edges for a tight, finished corner, dado slots at every interior panel intersection for a mechanical interlock before adhesive is applied. Neither joint relies on adhesive condition alone. The chamber divider wall uses the same joinery standard as the exterior panels, fully interlocked, adhesive-sealed, and CNC-cut to maintain the acoustic isolation between chambers.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- IMPEDANCE WIRING BLOCK --\u003e\n  \u003cdiv class=\"ms-wiring\"\u003e\n    \u003ch3\u003eImpedance Wiring: Know Before You Order\u003c\/h3\u003e\n    \u003cdiv class=\"ms-wiring-row\"\u003e\n      \u003cdiv class=\"ms-wiring-load\"\u003e1Ω\u003c\/div\u003e\n      \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo thinPRO12-2 (Single 2Ω) wired in parallel.\u003c\/strong\u003e Maximum power extraction from 1Ω-stable monoblocks. Verify your amplifier is explicitly rated for sustained 1Ω operation before selecting this configuration.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"ms-wiring-row\"\u003e\n      \u003cdiv class=\"ms-wiring-load\"\u003e2Ω\u003c\/div\u003e\n      \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo thinPRO12-4 (Single 4Ω) wired in parallel.\u003c\/strong\u003e Broadest amplifier compatibility. Most quality Class D monoblocks are stable and efficient at 2Ω. This is the recommended configuration for most builds.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"ms-wiring-row\"\u003e\n      \u003cdiv class=\"ms-wiring-load\"\u003e4Ω\u003c\/div\u003e\n      \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo thinPRO12-2 (Single 2Ω) wired in series.\u003c\/strong\u003e Safest electrical configuration. Requires a monoblock with strong 4Ω output ratings to deliver the power ceiling these drivers need.\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WHY CARDS --\u003e\n  \u003cdiv class=\"ms-card-grid\"\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n      \u003ch4\u003eDual Chamber: 0.60 cu ft Each, Acoustically Isolated\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eEach driver occupies its own fully sealed chamber at \u003cstrong\u003e0.60 cubic feet net\u003c\/strong\u003e: Wavtech's optimal sealed volume for the thinPRO 12. The chamber divider is CNC-cut and dado-jointed. Neither driver shares airspace with the other.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eBaffle\u003c\/span\u003e\n      \u003ch4\u003e1.5\" Double-Layer Stack Fab, 1,500W Combined Load\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eTwo bonded layers of \u003cstrong\u003eLangboard Elite 3\/4\" MDF\u003c\/strong\u003e at 1.5 inches total. At 1,500 watts RMS combined, the baffle is the highest-stress panel in this build. Double-layer construction eliminates the resonance a single panel would introduce at this output level.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eJoinery\u003c\/span\u003e\n      \u003ch4\u003eV-Groove + Dado: Two Mechanical Systems\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003e\u003cstrong\u003eV-groove joinery\u003c\/strong\u003e at exterior panel edges creates tight, finished corners. \u003cstrong\u003eDado joinery\u003c\/strong\u003e at interior panel intersections provides a mechanical interlock at every critical joint. Both systems are adhesive-sealed. No joint relies on glue alone.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eTerminal\u003c\/span\u003e\n      \u003ch4\u003eProline X Terminal Cup: One Per Chamber\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eEach chamber has its own dedicated \u003cstrong\u003eProline X ABS\/carbon fiber terminal cup\u003c\/strong\u003e with stainless steel hardware and copper ring terminals. Pre-wired with 12-gauge OFC internally. No shared terminal between drivers. Each driver connects independently to its own cup.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n      \u003ch4\u003e8\/32 Threaded Inserts: Machine Screws Included\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eBoth baffle positions are fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e. Stainless 8\/32 machine screws are included for both drivers. Each thinPRO 12 threads into steel, not MDF. Consistent clamping torque, no stripping, and both drivers reinstall cleanly after any service.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eDepth\u003c\/span\u003e\n      \u003ch4\u003e8\" Total: Dual 12\" Where a Standard Box Cannot Go\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eA conventional dual 12\" sealed enclosure at 1.20 cubic feet runs \u003cstrong\u003e14–18 inches deep\u003c\/strong\u003e. The M12D-S WAV runs 8. The thinPRO 12's 3-inch mounting depth is the only reason this geometry is possible, and this enclosure is the only dual 12\" build that uses it correctly.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eConfiguration\u003c\/span\u003e\n      \u003ch4\u003eFront-Firing or Downfiring: Feet Included\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe M12D-S WAV ships with \u003cstrong\u003efeet for downfiring installation\u003c\/strong\u003e. Run it front-firing in a standard trunk or cargo floor orientation, or flip it to downfire to couple bass output with the vehicle floor. No additional hardware required for either configuration.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eAcoustic\u003c\/span\u003e\n      \u003ch4\u003ePolyfill Pre-Installed: Per Chamber\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003ePolyfill is packed and installed in \u003cstrong\u003eeach chamber independently\u003c\/strong\u003e at the factory. Consistent density per chamber, confirmed before the enclosure ships. Factory installation removes the variable of installer-estimated packing. Both chambers are acoustically matched at the polyfill stage.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- HIGHLIGHT --\u003e\n  \u003cdiv class=\"ms-highlight\"\u003e\n    \u003ch3\u003eReady to Mount. Ready to Wire.\u003c\/h3\u003e\n    \u003cp\u003eBoth baffles ship with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e and stainless machine screws included, both thinPRO 12 drivers mount to steel, not MDF. Each chamber has its own \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e pre-wired with 12-gauge OFC. Connect your amplifier runs to the two terminal cups, mount both drivers, and installation is complete. No internal wiring work, no hardware to source separately.\u003c\/p\u003e\n    \u003ch3\u003eOptional Acrylic Front Panel\u003c\/h3\u003e\n    \u003cp\u003eThe M12D-S WAV is available with an optional \u003cstrong\u003egloss black acrylic front panel\u003c\/strong\u003e. Option B adds the Wavtech logo in white. Option C adds your custom artwork. Submit your file after purchase and we will confirm before production. Option A ships without acrylic. Plush black carpet face only. Select at checkout.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FITMENT --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n    \u003cp\u003eAt 29\" × 15\" × 8\", measure your available space before ordering. The 29\" width and 15\" depth are the dimensions most likely to be constraints depending on your vehicle. The 8\" height is what makes this viable in applications where no conventional dual 12\" build would fit:\u003c\/p\u003e\n    \u003cul class=\"ms-fitment\"\u003e\n      \u003cli\u003eBehind-seat: full-size crew cab and extended cab trucks\u003c\/li\u003e\n      \u003cli\u003eTrunk floor: full-size sedans and wagons\u003c\/li\u003e\n      \u003cli\u003eFlat cargo floor: crossovers and mid-size SUVs\u003c\/li\u003e\n      \u003cli\u003eUnder rear bench: SUVs and full-size vans\u003c\/li\u003e\n      \u003cli\u003eStealth cargo builds: hatchbacks and sports wagons\u003c\/li\u003e\n      \u003cli\u003eHigh-output daily builds where depth is the primary constraint\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WARRANTY --\u003e\n  \u003cdiv class=\"ms-warranty\"\u003e\n    \u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n    \u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures carry a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Built and inspected in our Tullahoma, Tennessee facility before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003chr class=\"ms-divider\"\u003e\n\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n    \u003cp\u003eThe M12D-S WAV is CNC-cut and hand-assembled in Tullahoma, Tennessee on ShopSabre CNC routers. Every panel dimension, chamber volume, dado joint depth, baffle layer count, and terminal placement is held to spec on every unit. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e throughout: named, mill-documented, published density and internal bond specifications. Not a generic \"premium MDF\" claim.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\n\u003c!-- ============================================================\n     SPECS TABLE — drop into Specifications metafield\n     ============================================================ --\u003e\n\n\u003c!--\n\u003ctable width=\"100%\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eM12D-S WAV\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCompatible Driver\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eWavtech thinPRO12-2 \/ thinPRO12-4\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eConfiguration\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eDual 12\" — Dual Chamber Sealed\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eInternal Volume (Net)\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1.20 Cubic Feet Total (0.60 cu ft per chamber)\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eLangboard Elite 3\/4\" MDF\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eCNC-Cut Stack Fab \/ V-Groove + Dado Joinery\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFront Panel Thickness\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1.5 Inches (Double-Layer Stack Fab)\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eExternal Width\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e29 Inches\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eExternal Height\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e8 Inches\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eExternal Depth\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e15 Inches\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eMax Mounting Depth\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e6.0 Inches\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eWoofer Opening\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eDirect Fit — Wavtech thinPRO 12 (Standard 12\" Cutout)\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eDriver Mounting\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e8\/32 Threaded Inserts — Stainless Machine Screws Included\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eTerminal Cup\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eProline X ABS\/Carbon Fiber — One Per Chamber, Pre-Wired\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eInternal Wiring\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e12-Gauge OFC (Oxygen-Free Copper)\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eImpedance Options\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1Ω (two S2Ω parallel) \/ 2Ω (two S4Ω parallel) \/ 4Ω (two S2Ω series)\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFiring Direction\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eFront-Firing or Downfiring\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eDownfire Feet\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eIncluded\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003ePolyfill\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003ePre-Installed Per Chamber\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003ePlush Black Automotive Carpet\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eOptional Acrylic Panel\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eGloss Black — Wavtech Logo (B) or Custom (C)\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e80 lbs\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e2 Years — Proline X \/ Audio Intensity\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eMade In\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eTullahoma, Tennessee, USA\u003c\/td\u003e\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n--\u003e\n\n\n\u003c!-- ============================================================\n     CHEAT SHEET — drop into Quick Specs metafield\n     ============================================================ --\u003e\n\n\u003c!--\n\u003cul class=\"cheat-sheet-list\"\u003e\n  \u003cli\u003e\u003cstrong\u003eBest For:\u003c\/strong\u003e High-output stealth builds — full-size trucks, trunk floor installs, depth-constrained dual 12\" applications\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003ePower:\u003c\/strong\u003e 1,500W RMS combined (750W RMS per Wavtech thinPRO 12)\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eTopology\/Class:\u003c\/strong\u003e Sealed \/ Dual Chamber \/ Double-Layer Stack Fab \/ Front-Fire or Downfire\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eSonic Character:\u003c\/strong\u003e Deep, controlled, musical dual 12\" output — 0.60 cu ft per chamber hits Wavtech's optimal sealed target exactly\u003c\/li\u003e\n\u003c\/ul\u003e\n--\u003e","brand":"Proline X","offers":[{"title":"No Thanks","offer_id":43162222100569,"sku":"M12D-S WAV NA","price":299.99,"currency_code":"USD","in_stock":true},{"title":"Yes- Brand or Automotive Logo","offer_id":43162278953049,"sku":"M12D-S WAV LOGO","price":339.99,"currency_code":"USD","in_stock":true},{"title":"Custom - Contact me for details","offer_id":43162222133337,"sku":"M12D-S WAV CUST","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/loaded-dual-wavtech-thinpro12-subwoofers-proline-x-micro-series-sealed-enclosureenclosed-subwooferaudio-intensity-504909.jpg?v=1761970494"},{"product_id":"proline-x-micro-series-12-sealed-enclosure-fits-jl-12tw3","title":"Proline X Micro Series 12\" Sealed Enclosure - Fits JL Audio 12TW3","description":"\u003c!-- ============================================================\n     PROLINE X MICRO SERIES — JL AUDIO 12TW3\n     SEALED 12\" ENCLOSURE ONLY\n     Color system: Green (#16a34a primary)\n     ============================================================ --\u003e\n\n\u003cstyle\u003e\n  .ms-wrap * { box-sizing: border-box; }\n  .ms-wrap { font-family: inherit; color: #1e293b; line-height: 1.7; max-width: 1200px; margin: 0 auto; }\n\n  .ms-hero {\n    background: linear-gradient(135deg, #0f172a 0%, #14532d 100%);\n    border-radius: 8px;\n    padding: 40px 36px;\n    margin-bottom: 32px;\n    position: relative;\n    overflow: hidden;\n  }\n  .ms-hero::before {\n    content: '';\n    position: absolute;\n    top: -40px; right: -40px;\n    width: 220px; height: 220px;\n    background: rgba(22,163,74,0.12);\n    border-radius: 50%;\n  }\n  .ms-hero-badge {\n    display: inline-block;\n    background: transparent;\n    border: 2px solid #16a34a;\n    color: #86efac;\n    font-size: 0.75em;\n    font-weight: 700;\n    letter-spacing: 0.12em;\n    text-transform: uppercase;\n    padding: 4px 14px;\n    border-radius: 20px;\n    margin-bottom: 16px;\n  }\n  .ms-hero h2 { color: #ffffff; font-size: 1.65em; font-weight: 800; margin: 0 0 14px 0; line-height: 1.25; }\n  .ms-hero p { color: #cbd5e1; font-size: 1em; margin: 0 0 24px 0; max-width: 640px; line-height: 1.7; }\n  .ms-hero-stats { display: flex; gap: 28px; flex-wrap: wrap; }\n  .ms-stat { text-align: center; }\n  .ms-stat-num { display: block; color: #86efac; font-size: 1.5em; font-weight: 800; line-height: 1; }\n  .ms-stat-label { display: block; color: #94a3b8; font-size: 0.72em; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; }\n\n  .ms-section {\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-top: 4px solid #16a34a;\n    border-radius: 6px;\n    padding: 28px 32px;\n    margin-bottom: 24px;\n  }\n  .ms-section:nth-child(odd) { background: #f8fafc; }\n  .ms-section h3 { color: #14532d; font-size: 1.15em; font-weight: 700; margin: 0 0 14px 0; }\n  .ms-section p { color: #334155; font-size: 0.97em; margin: 0 0 12px 0; }\n  .ms-section p:last-child { margin-bottom: 0; }\n\n  .ms-highlight {\n    background: #f0fdf4;\n    border-left: 5px solid #16a34a;\n    padding: 22px 28px;\n    margin: 28px 0;\n    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0.68em;\n    font-weight: 700;\n    letter-spacing: 0.1em;\n    text-transform: uppercase;\n    padding: 3px 10px;\n    border-radius: 3px;\n    margin-bottom: 10px;\n  }\n  .ms-card h4 { color: #14532d; font-size: 1em; font-weight: 700; margin: 0 0 10px 0; }\n  .ms-card-divider { height: 2px; background: #16a34a; width: 32px; margin-bottom: 12px; border-radius: 2px; }\n  .ms-card p { font-size: 0.93em; color: #475569; margin: 0; line-height: 1.65; }\n  .ms-card p strong { color: #14532d; }\n\n  .ms-warranty {\n    background: #0f172a;\n    border-left: 5px solid #16a34a;\n    border-radius: 0 6px 6px 0;\n    padding: 20px 28px;\n    margin: 28px 0;\n    display: flex;\n    align-items: center;\n    gap: 20px;\n  }\n  .ms-warranty-badge { background: #16a34a; color: #ffffff; font-size: 1em; font-weight: 800; padding: 10px 16px; border-radius: 4px; white-space: nowrap; }\n  .ms-warranty p { color: #cbd5e1; font-size: 0.93em; margin: 0; line-height: 1.6; }\n  .ms-warranty strong { color: #ffffff; }\n\n  .ms-fitment { list-style: none; margin: 14px 0 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }\n  @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n  .ms-fitment li { font-size: 0.93em; color: #334155; padding: 8px 12px; background: #f0fdf4; border-left: 3px solid #16a34a; border-radius: 0 4px 4px 0; }\n\n  .ms-divider { border: none; border-top: 1px solid #e2e8f0; margin: 32px 0; }\n  .ms-langboard { font-weight: 700; color: #14532d; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ms-wrap\"\u003e\n\n  \u003c!-- HERO --\u003e\n  \u003cdiv class=\"ms-hero\"\u003e\n    \u003cspan class=\"ms-hero-badge\"\u003eMicro Series | JL 12TW3 | Enclosure Only\u003c\/span\u003e\n    \u003ch2\u003eBuilt Around the JL Audio 12TW3.\u003cbr\u003e0.80 cu ft. Exactly.\u003c\/h2\u003e\n    \u003cp\u003eJL Audio publishes 0.80 cubic feet as the optimum sealed volume for the 12TW3. The Proline X Micro Series enclosure for the 12TW3 delivers exactly that, net, after displacement, in a double-layer stack-fab build that is 6.75 inches deep. Tab-ear cutout machined to JL Audio's exact geometry. 8\/32 threaded inserts for machine screw mounting. Front-firing or downfiring with feet included.\u003c\/p\u003e\n    \u003cdiv class=\"ms-hero-stats\"\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e0.80\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net, JL Optimum\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e6.75\"\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eTotal Depth\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e1.5\"\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eDouble-Layer Baffle\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e3.5\"\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eMax Mount Depth\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n  \u003cdiv class=\"ms-alert\"\u003e\n    \u003cstrong\u003eEnclosure only.\u003c\/strong\u003e The JL Audio 12TW3 subwoofer is not included. This enclosure fits both the 12TW3-D4 and 12TW3-D8, the tab-ear cutout geometry and mounting hardware are identical across both variants.\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 1: Volume --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003e0.80 Cubic Feet, JL Audio's Published Optimum, Delivered Net\u003c\/h3\u003e\n    \u003cp\u003eThe JL Audio 12TW3 has a Fs of 26.5 Hz, a Qts of 0.53, and a Vas of 48.7 liters. JL Audio's published optimum sealed volume for this driver is 0.80 cubic feet. At that volume the system Qtc lands at the target JL Audio designed for in compact sealed applications. Producing controlled extension into the low 30s with the tight transient response the TW3 platform is built around.\u003c\/p\u003e\n    \u003cp\u003eGeneric 12\" shallow-mount enclosures are built to approximate volumes and sold as universal fits. This enclosure is built to one spec, for one driver. The 0.80 cubic foot figure is net internal volume. Calculated after driver displacement, double-layer baffle thickness, and polyfill are subtracted. Not approximated from external box dimensions before hardware is accounted for.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 2: Construction --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eStack-Fab Construction with a 1.5\" Double-Layer Baffle\u003c\/h3\u003e\n    \u003cp\u003eThe front baffle is a double-layer stack-fab build, two CNC-cut Langboard Elite MDF panels bonded to 1.5 inches total thickness. The baffle carries the driver's mechanical mounting load and sustains the full acoustic pressure differential between the sealed interior and exterior on every bass transient. At 400 watts RMS on a 12\" cone, a single 3\/4\" panel resonates at frequencies within the driver's operating range. Two bonded layers eliminate that coloration at the structural level.\u003c\/p\u003e\n    \u003cp\u003eThe rest of the enclosure uses CNC-cut interlocking dado joints at every panel intersection, mechanical interlock before adhesive, adhesive seal after. Neither alone is the joint. The 6.75\" total depth gives each side panel more inherent geometric rigidity than the ultra-shallow Wavtech builds in the same series, which means the dado joinery here is reinforcing an already more rigid structure rather than compensating for shallow panel depth.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WHY CARDS --\u003e\n  \u003cdiv class=\"ms-card-grid\"\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n      \u003ch4\u003e0.80 cu ft Net, JL Audio's Published Optimum\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eJL Audio specifies \u003cstrong\u003e0.80 cubic feet\u003c\/strong\u003e as the optimum sealed volume for the 12TW3. This enclosure delivers that number net. After driver displacement, double-layer baffle thickness, and polyfill are subtracted. Not approximated from external dimensions.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eBaffle\u003c\/span\u003e\n      \u003ch4\u003e1.5\" Double-Layer: Baffle Resonance Eliminated\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eTwo bonded layers of \u003cstrong\u003eLangboard Elite 3\/4\" MDF\u003c\/strong\u003e produce a 1.5-inch baffle that does not flex or resonate at 400 watts RMS on a 12\" driver. Panel resonance at the baffle adds coloration to bass output. Double-layer construction eliminates it at the source.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n      \u003ch4\u003e8\/32 Threaded Inserts: Correct for Tab-Ear Drivers\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe 12TW3 uses injection-molded plastic mounting ears. Tapered wood screws apply outward pressure to those ears and will crack them under sustained vibration. \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless machine screws eliminate this failure mode entirely, the driver mounts to steel, not MDF, with even clamping force across all four ears.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eWiring\u003c\/span\u003e\n      \u003ch4\u003eProline X Terminal Cup: Pre-Wired with 12g OFC\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with \u003cstrong\u003e12-gauge OFC\u003c\/strong\u003e run internally to the driver location. Connect your amplifier run to the terminal and mount the driver. No internal wiring work required.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eCutout\u003c\/span\u003e\n      \u003ch4\u003e11-5\/8\" Tab-Ear Geometry: Machined for the 12TW3\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe baffle cutout is machined to the \u003cstrong\u003e12TW3's tab-ear geometry\u003c\/strong\u003e: 11-5\/8\" (295mm) with mounting points positioned for the TW3's four-ear spacing. The driver seats flush against the baffle gasket without shimming or modification.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eConfiguration\u003c\/span\u003e\n      \u003ch4\u003eFront-Firing or Downfiring: Feet Included\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eRubber feet for \u003cstrong\u003edownfiring installation\u003c\/strong\u003e are included. Run it front-firing in a standard trunk or cargo orientation, or flip it downward to couple bass output with the vehicle floor. The 12TW3's no-pole-vent design means there are no motor ventilation concerns in either orientation.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eStructure\u003c\/span\u003e\n      \u003ch4\u003eDado Joinery: No Joint Relies on Glue Alone\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eEvery panel joint uses CNC-cut interlocking \u003cstrong\u003edado slots\u003c\/strong\u003e: the mechanical interlock holds panel alignment under load before adhesive is applied. The adhesive seals the joint permanently. Both together produce an airtight, acoustically inert enclosure that holds its integrity under sustained use.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eAcoustic\u003c\/span\u003e\n      \u003ch4\u003ePolyfill Pre-Installed at the Factory\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003ePolyfill is packed and installed at the factory before the enclosure ships. It acoustically extends effective internal volume for improved low-frequency output without adding external size. \u003cstrong\u003eFactory installation\u003c\/strong\u003e ensures consistent packing density on every unit, not left to the installer to approximate.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eReinforcement\u003c\/span\u003e\n      \u003ch4\u003eDowel-Reinforced Stack Fab: Mechanical Strength Beyond the Joint\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe stack-fab assembly is further reinforced with \u003cstrong\u003edowels throughout the construction\u003c\/strong\u003e. Dowels add mechanical alignment and shear resistance at panel joints beyond what dado joinery and adhesive alone provide. Locking the panel stack against lateral movement under the sustained excursion load a sealed enclosure generates at volume. The result is a structure that holds its geometry and its acoustic seal over years of real-world use.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- HIGHLIGHT --\u003e\n  \u003cdiv class=\"ms-highlight\"\u003e\n    \u003ch3\u003eReady to Mount. Ready to Wire. Ready to Downfire.\u003c\/h3\u003e\n    \u003cp\u003eThe enclosure ships fully prepped. The \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with 12-gauge OFC. Connect your amplifier run and that side is complete. The double-layer baffle uses \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless machine screws included. Both critical for the 12TW3's tab-ear mounting system. \u003cstrong\u003eRubber feet for downfiring\u003c\/strong\u003e are included. Polyfill is already packed.\u003c\/p\u003e\n    \u003ch3\u003eImpedance Options: 12TW3-D4 and 12TW3-D8\u003c\/h3\u003e\n    \u003cp\u003eThe JL Audio 12TW3 is available as the \u003cstrong\u003e12TW3-D4\u003c\/strong\u003e (dual 4-ohm voice coils) and the \u003cstrong\u003e12TW3-D8\u003c\/strong\u003e (dual 8-ohm voice coils). Both variants are physically identical and fit this enclosure. With the D4 wired in parallel you present a 2-ohm load; series presents 8 ohms. With the D8 wired in parallel you present a 4-ohm load; series presents 16 ohms. Most builds run the D4 at 2 ohms into a 2-ohm-stable monoblock in the 300–400 watt RMS range.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FITMENT --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n    \u003cp\u003eAt 26\" × 14.75\" × 6.75\", this enclosure opens install locations that a conventional 0.80 cu ft sealed 12\" box, typically 10–14\" deep, cannot reach:\u003c\/p\u003e\n    \u003cul class=\"ms-fitment\"\u003e\n      \u003cli\u003eBehind-seat: full-size crew cab and extended cab trucks\u003c\/li\u003e\n      \u003cli\u003eUnder rear bench: SUVs and full-size vans\u003c\/li\u003e\n      \u003cli\u003eTrunk floor: full-size sedans and wagons\u003c\/li\u003e\n      \u003cli\u003eCargo floor: crossovers and mid-size SUVs\u003c\/li\u003e\n      \u003cli\u003eHatch floor: sports cars and hatchbacks\u003c\/li\u003e\n      \u003cli\u003eBehind-seat downfire. Truck cabs where floor coupling improves response\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WARRANTY --\u003e\n  \u003cdiv class=\"ms-warranty\"\u003e\n    \u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n    \u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures carry a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Built and inspected in our Tullahoma, Tennessee facility before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003chr class=\"ms-divider\"\u003e\n\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n    \u003cp\u003eEvery Proline X Micro Series enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee on ShopSabre CNC routers. Internal volume, dado joint depth, tab-ear cutout geometry, baffle layer count, and terminal placement are all held to spec on every unit. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e throughout: a named, mill-documented board with published density, internal bond, and screw-holding specifications.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43172437688409,"sku":"M12-S JL","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/jl-audio-10tw3-d4-in-proline-x-micro-series-enclosureenclosed-subwooferproline-x-745238.jpg?v=1774209158"},{"product_id":"proline-x-micro-series-12-sealed-enclosure-fits-resonix-gus-12","title":"Proline X Micro Series 12\" Sealed Enclosure | Built for ResoNix GUS-12","description":"\u003c!-- ============================================================\n     PROLINE X MICRO SERIES: ResoNix GUS-12\n     SEALED 12\" ENCLOSURE ONLY\n     Color system: Green (#16a34a primary)\n     ============================================================ --\u003e\n\u003cstyle\u003e\n  .ms-wrap * { box-sizing: border-box; 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}\n  .ms-stat { text-align: center; }\n  .ms-stat-num { display: block; color: #86efac; font-size: 1.5em; font-weight: 800; line-height: 1; }\n  .ms-stat-label { display: block; color: #94a3b8; font-size: 0.72em; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; }\n\n  .ms-section {\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-top: 4px solid #16a34a;\n    border-radius: 6px;\n    padding: 28px 36px;\n    margin-bottom: 24px;\n  }\n  .ms-section:nth-child(odd) { background: #f8fafc; }\n  .ms-section h3 { color: #14532d; font-size: 1.15em; font-weight: 700; margin: 0 0 14px 0; }\n  .ms-section p { color: #334155; font-size: 0.97em; margin: 0 0 12px 0; }\n  .ms-section p:last-child { margin-bottom: 0; }\n\n  .ms-highlight {\n    background: #f0fdf4;\n    border-left: 5px solid #16a34a;\n    padding: 22px 36px;\n    margin: 28px 0;\n    border-radius: 0 6px 6px 0;\n  }\n  .ms-highlight h3 { color: #14532d; margin: 0 0 10px 0; font-size: 1.1em; font-weight: 700; }\n  .ms-highlight h3 + h3 { margin-top: 18px; }\n  .ms-highlight p { margin-bottom: 10px; color: #1e293b; font-size: 0.97em; }\n  .ms-highlight p:last-child { margin-bottom: 0; }\n\n  .ms-alert {\n    background: #dcfce7;\n    border: 1px solid #16a34a;\n    border-radius: 6px;\n    padding: 16px 36px;\n    margin: 20px 0;\n    font-size: 0.93em;\n    color: #166534;\n  }\n  .ms-alert strong { color: #14532d; }\n\n  .ms-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 24px 0; }\n  @media (max-width: 600px) { .ms-card-grid { grid-template-columns: 1fr; } }\n  .ms-card {\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-top: 3px solid #16a34a;\n    border-radius: 6px;\n    padding: 22px;\n  }\n  .ms-card-label {\n    display: inline-block;\n    background: #16a34a;\n    color: #ffffff;\n    font-size: 0.68em;\n    font-weight: 700;\n    letter-spacing: 0.1em;\n    text-transform: uppercase;\n    padding: 3px 10px;\n    border-radius: 3px;\n    margin-bottom: 10px;\n  }\n  .ms-card h4 { color: #14532d; font-size: 1em; font-weight: 700; margin: 0 0 10px 0; }\n  .ms-card-divider { height: 2px; background: #16a34a; width: 32px; margin-bottom: 12px; border-radius: 2px; }\n  .ms-card p { font-size: 0.93em; color: #475569; margin: 0; line-height: 1.65; }\n  .ms-card p strong { color: #14532d; }\n\n  .ms-warranty {\n    background: #0f172a;\n    border-left: 5px solid #16a34a;\n    border-radius: 0 6px 6px 0;\n    padding: 20px 36px;\n    margin: 28px 0;\n    display: flex;\n    align-items: center;\n    gap: 20px;\n  }\n  .ms-warranty-badge { background: #16a34a; color: #ffffff; font-size: 1em; font-weight: 800; padding: 10px 16px; border-radius: 4px; white-space: nowrap; }\n  .ms-warranty p { color: #cbd5e1; font-size: 0.93em; margin: 0; line-height: 1.6; }\n  .ms-warranty strong { color: #ffffff; }\n\n  .ms-fitment { list-style: none; margin: 14px 0 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }\n  @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n  .ms-fitment li { font-size: 0.93em; color: #334155; padding: 8px 12px; background: #f0fdf4; border-left: 3px solid #16a34a; border-radius: 0 4px 4px 0; }\n\n  .ms-divider { border: none; border-top: 1px solid #e2e8f0; margin: 32px 0; }\n  .ms-langboard { font-weight: 700; color: #14532d; }\n\u003c\/style\u003e\n\u003cdiv class=\"ms-wrap\"\u003e\n\u003c!-- HERO --\u003e\n\u003cdiv class=\"ms-hero\"\u003e\n\u003cdiv class=\"ms-hero-badges\"\u003e\n\u003cspan class=\"ms-hero-badge\"\u003eMicro Series | GUS-12 | Enclosure Only\u003c\/span\u003e\u003cspan class=\"ms-hero-revision\"\u003eDesign Revision 5.20.26\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-hero-middle\"\u003e\n\u003cdiv class=\"ms-hero-text\"\u003e\n\u003ch2\u003eBuilt Exclusively for the ResoNix GUS-12.\u003cbr\u003eThe Most Linear Shallow 12\" Available.\u003c\/h2\u003e\n\u003cp\u003eThe ResoNix GUS-12 has a measured Fs of 14.54 Hz, a Qts of 0.28, and Klippel-verified Xmax of 20.69mm, backed by published LSI data from the same testing program that has measured every major shallow driver on the market. The Proline X Micro Series enclosure delivers exactly 0.80 cubic feet of net sealed airspace (ResoNix's 0.75 cu ft recommendation plus 0.047 cu ft of driver displacement) in a double-layer stack-fab build that is 6.75 inches deep.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-hero-image\"\u003e\u003cimg alt=\"Proline X Micro Series 12-inch sealed enclosure for ResoNix GUS-12\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-12-sealed-enclosure-fits-resonix-gus-12subwoofer-enclosuresproline-x-1751548.jpg?v=1775617929\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-hero-stats\"\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e0.80\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net (Displacement Correct)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e6.75\"\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eTotal Depth\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e14.54\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eDriver Fs (Hz)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e800W\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eDriver RMS Rating\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n\u003cdiv class=\"ms-alert\"\u003e\n\u003cstrong\u003eEnclosure only.\u003c\/strong\u003e The ResoNix GUS-12 subwoofer is not included and must be purchased directly from ResoNix Sound Solutions. This enclosure is designed exclusively for the GUS-12. No other driver shares its cutout geometry or is served by this specific volume target.\u003c\/div\u003e\n\u003c!-- SECTION 1: The Volume Math --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003e0.80 cu ft: How the Volume Was Calculated\u003c\/h3\u003e\n\u003cp\u003eResoNix publishes a recommended sealed enclosure of 0.75 cubic feet for the GUS-12 to achieve 0.707 Qtc. The GUS-12 has a published driver displacement of 0.047 cubic feet. Building a box to a gross internal volume of 0.75 cubic feet and then installing the driver would reduce the net acoustic airspace by 0.047, leaving the driver with only 0.703 cubic feet of effective volume and a Qtc slightly above target.\u003c\/p\u003e\n\u003cp\u003eThe correct approach is to build the gross internal volume at 0.75 + 0.047 = 0.797 cubic feet, so that after driver displacement is subtracted, the driver sees exactly 0.75 cubic feet of net acoustic airspace. The M12-S GUS enclosure is built to a gross volume that delivers \u003cstrong\u003e0.80 cubic feet net\u003c\/strong\u003e after displacement, hitting ResoNix's recommended target accurately rather than approximately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 1B: Why the External Dimensions Look Bigger Than They Should --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003e\"If I Do the Math on the External Dimensions, the Volume Looks Too Big\"\u003c\/h3\u003e\n\u003cp\u003eThis is the most common question we get on every GUS enclosure. The math customers run looks like this: external dimensions of 26\" × 14.75\" × 6.75\" subtract 3\/4\" walls on all six sides, leaving an assumed internal cavity of 24.5\" × 13.25\" × 5.25\". That works out to 1,704 cubic inches, or roughly 0.99 cubic feet. The listed net volume is 0.80 cubic feet, a difference of nearly 0.20 cu ft, which looks like the enclosure must be oversized by about 24%.\u003c\/p\u003e\n\u003cp\u003eThat math assumes four things that are not true on a Proline X stack-fab enclosure:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1. The walls are not 3\/4\" on every side.\u003c\/strong\u003e The front baffle is a double-layer stack-fab build at 1.5 inches thick, twice the assumed wall thickness. That alone removes more internal depth than a 3\/4\" calculation accounts for.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. The enclosure is not a perfect rectangle.\u003c\/strong\u003e Viewed from above, all four corners are radiused at 3 inches. This is a deliberate design choice for two reasons: the rounded corners break up the parallel-wall geometry that creates internal standing waves, and they produce a finished shape that fits cleanly against vehicle interior surfaces without sharp corners catching on trim or upholstery. The 3\" radii remove measurable internal volume that an external-minus-walls calculation assumes is open airspace.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. The area directly behind the driver's magnet is precision-milled.\u003c\/strong\u003e This is a deliberate engineering step that serves two purposes. First, it allows us to make fine volume adjustments to hit the target airspace exactly. Second, and more importantly, it increases the open area immediately behind the driver's rear vent. The GUS-12's pole vent is part of the driver's voice coil cooling system. Air flows through the vent during cone movement, carrying heat away from the voice coil former. If the area immediately behind the vent is restricted, backpressure builds against that airflow and voice coil cooling is compromised. Most enclosure manufacturers do not understand this airflow dynamic, and even fewer engineer around it. We do.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. The driver itself displaces 0.047 cubic feet once installed.\u003c\/strong\u003e The basket, motor, and pole structure occupy roughly 81 cubic inches inside the chamber. This is not subtracted from a back-of-napkin external calculation, but it is subtracted from what the driver acoustically loads into.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow we actually calculate volume.\u003c\/strong\u003e Our engineering approach is built on precision, and it is different from how most enclosure manufacturers calculate airspace and different from the math any customer can do from external dimensions. A Proline X stack-fab enclosure is built from individually CNC-cut layers, each with its own machined opening. We calculate the precise internal volume of every layer's opening, then sum those layer-by-layer volumes to arrive at the actual net airspace inside the assembled enclosure. No one else in this industry calculates net volume this way. It is the only method that produces a genuinely accurate account of the airspace a driver sees once the enclosure is built. This is the same level of engineering precision ResoNix applies to the GUS-12 driver itself, and it is why the 0.80 cubic foot figure is exact rather than approximate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 2: The Driver --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003eWhy the GUS-12 Is Unlike Every Other Driver in This Series\u003c\/h3\u003e\n\u003cp\u003eThe GUS-12 was engineered by ResoNix Sound Solutions, the same operation that independently Klippel-tests more car audio subwoofers than anyone else publishing data in the enthusiast market. The GUS-12 was built specifically to outperform every driver they had measured on BL linearity, Cms symmetry, inductance stability, and verified Xmax. The data is published and verifiable.\u003c\/p\u003e\n\u003cp\u003eQts of 0.28 is the number that defines this driver's character in an enclosure. At 0.75 cubic feet sealed, the system Qtc targets 0.707, producing flat anechoic response with deep extension. Fs at 14.54 Hz means the driver's natural resonance is below the usable range of virtually any car audio system, which gives the sealed alignment maximum low-frequency extension capability before rolloff begins. The GUS-12 is engineered for accuracy, deep extension, and low distortion at real-world listening levels. The copper shorting rings, titanium voice coil former, and Nomex\/carbon fiber cone are engineering decisions that show up in the distortion measurements, not just the spec sheet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 3: Construction --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003e1.5\" Double-Layer Baffle. Stack Fab. Dowel Reinforced.\u003c\/h3\u003e\n\u003cp\u003eAt 800 watts RMS the GUS-12 generates more sustained internal pressure than any other single driver in the Micro Series lineup. The front baffle is a double-layer stack-fab build: two CNC-cut Langboard Elite MDF panels bonded to 1.5 inches total. The stack-fab assembly is further reinforced with dowels throughout, adding between-layer tension reinforcement that locks the panel stack against shear movement under sustained high-power operation.\u003c\/p\u003e\n\u003cp\u003eThe stack-fab construction itself does the joining: every CNC-cut layer interlocks with the layers above and below it, eliminating single-layer butt joints entirely. The 6.75-inch total depth gives each side wall more inherent geometric rigidity than the ultra-shallow Wavtech builds in this series, and the Langboard Elite MDF used throughout has published 200 psi internal bond and 410,000 psi MOE specifications that hold up under sustained high-power use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- WHY CARDS --\u003e\n\u003cdiv class=\"ms-card-grid\"\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n\u003ch4\u003e0.80 cu ft: ResoNix Recommendation + Driver Displacement\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eResoNix recommends \u003cstrong\u003e0.75 cu ft\u003c\/strong\u003e net for 0.707 Qtc. GUS-12 driver displacement is \u003cstrong\u003e0.047 cu ft\u003c\/strong\u003e. This enclosure is built to 0.75 + 0.047 = 0.797 gross volume, delivering exactly 0.75 cu ft net to the driver after displacement is accounted for.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eDriver\u003c\/span\u003e\n\u003ch4\u003eKlippel-Verified Xmax, Not a Marketing Number\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe GUS-12's \u003cstrong\u003e20.69mm Xmax at BL 70%\u003c\/strong\u003e is a Klippel large-signal measurement, the same methodology used to test every driver on ResoNix's independent testing platform. BL symmetry, Cms linearity, and Le stability are all published. The spec sheet is the measurement, not the marketing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eBaffle\u003c\/span\u003e\n\u003ch4\u003e1.5\" Double-Layer Dowel-Reinforced Stack Fab\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eTwo bonded \u003cstrong\u003eLangboard Elite 3\/4\" MDF\u003c\/strong\u003e layers at 1.5 inches total, further reinforced with \u003cstrong\u003edowels throughout\u003c\/strong\u003e. At 800 watts RMS, baffle resonance and panel flex are structural failure modes. Double-layer construction with dowel reinforcement eliminates both.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n\u003ch4\u003e8\/32 Threaded Inserts with Machine Screws Included\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe baffle is fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e on the back face. Stainless machine screws are included. The GUS-12 mounts to steel, not MDF. Consistent clamping force, no stripping risk under sustained high-power use, and clean reinstallation when service is needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eWiring\u003c\/span\u003e\n\u003ch4\u003eProline X Terminal Cup, Pre-Wired with 12g OFC\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with \u003cstrong\u003e12-gauge OFC\u003c\/strong\u003e run internally to the driver location. Connect your amplifier run to the terminal and mount the driver. No internal wiring work required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eCutout\u003c\/span\u003e\n\u003ch4\u003eDirect-Fit, Machined for the GUS-12\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe baffle cutout is machined to the \u003cstrong\u003eGUS-12's mounting diameter\u003c\/strong\u003e. The driver seats flush, seals against the rubber mounting ring gasket the GUS-12 includes, and mounts to the threaded inserts without shimming or modification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eConfiguration\u003c\/span\u003e\n\u003ch4\u003eFront-Firing or Downfiring, Feet Included\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eRubber feet for \u003cstrong\u003edownfiring installation\u003c\/strong\u003e are included. The GUS-12 features a vented rear cone assembly that allows the pole vent to be fully blocked, making downfire in a flush-mounted application structurally and acoustically viable without compromise.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eAcoustic\u003c\/span\u003e\n\u003ch4\u003ePolyfill Pre-Installed\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003ePolyfill is factory-installed. It acoustically dampens internal panel reflections without artificially altering volume. \u003cstrong\u003eFactory installation\u003c\/strong\u003e ensures consistent packing density across every unit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eReinforcement\u003c\/span\u003e\n\u003ch4\u003eDowel-Reinforced Stack Fab: Between-Layer Tension Locking\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe stack-fab assembly uses \u003cstrong\u003edowels throughout the construction\u003c\/strong\u003e as between-layer tension reinforcement, locking the panel stack against shear movement independent of adhesive condition. At 800 watts RMS across a sealed enclosure, the lateral forces on panel joints are sustained and significant. Dowels work with the interlocking stack-fab geometry and adhesive bonding to hold the assembly together over years of high-power use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- HIGHLIGHT --\u003e\n\u003cdiv class=\"ms-highlight\"\u003e\n\u003ch3\u003eReady to Mount. Ready to Wire. Ready to Perform.\u003c\/h3\u003e\n\u003cp\u003eThe enclosure ships fully prepped. The \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with 12-gauge OFC. Connect your amplifier run and wiring is complete. The double-layer baffle uses \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless machine screws included. \u003cstrong\u003eRubber feet for downfiring\u003c\/strong\u003e are included. Polyfill is factory-installed.\u003c\/p\u003e\n\u003cp\u003eThe GUS-12's Qts of 0.28 and Fs of 14.54 Hz produce deep extension and low distortion in this 0.75 cubic foot sealed alignment. The copper shorting rings, titanium voice coil former, and Nomex\/carbon fiber cone deliver measurable distortion performance that separates the GUS-12 from every other shallow 12 in its category.\u003c\/p\u003e\n\u003ch3\u003eImpedance Options: D2 and D4\u003c\/h3\u003e\n\u003cp\u003eThe GUS-12 is available as a \u003cstrong\u003eDual 2-ohm\u003c\/strong\u003e and \u003cstrong\u003eDual 4-ohm\u003c\/strong\u003e configuration. Wire the D2 parallel for 1 ohm, series for 4 ohms. Wire the D4 parallel for 2 ohms, series for 8 ohms. Most builds run the D4 at 2 ohms into a quality 2-ohm-stable monoblock. Confirm your amplifier's stable impedance before selecting the voice coil configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- FITMENT --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n\u003cp\u003eAt 26\" × 14.75\" × 6.75\", this enclosure opens install locations that a conventional 0.75 cu ft sealed 12\" box (typically 10 to 14 inches deep) cannot reach:\u003c\/p\u003e\n\u003cul class=\"ms-fitment\"\u003e\n\u003cli\u003eBehind-seat: full-size crew cab and extended cab trucks\u003c\/li\u003e\n\u003cli\u003eTrunk floor: full-size sedans, wagons, and sport sedans\u003c\/li\u003e\n\u003cli\u003eUnder rear bench: SUVs and full-size vans\u003c\/li\u003e\n\u003cli\u003eCargo floor: crossovers and mid-size SUVs\u003c\/li\u003e\n\u003cli\u003eHatch floor: sports cars and hatchbacks\u003c\/li\u003e\n\u003cli\u003eSQ competition builds where depth is the constraint\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- WARRANTY --\u003e\n\u003cdiv class=\"ms-warranty\"\u003e\n\u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures carry a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Built and inspected in our Tullahoma, Tennessee facility before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr class=\"ms-divider\"\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n\u003cp\u003eEvery Proline X Micro Series enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee on ShopSabre CNC routers. Internal volume, cutout geometry, layer-by-layer opening dimensions, baffle layer count, dowel placement, and terminal positioning are all held to spec on every unit. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e throughout: named, mill-documented, published density and bond specifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43172475502681,"sku":"M12-S Gus","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-12-sealed-enclosure-fits-resonix-gus-12subwoofer-enclosuresproline-x-1751548.jpg?v=1775617929"},{"product_id":"proline-x-micro-series-15-sealed-enclosure-fits-resonix-gus-15","title":"Proline X Micro Series 15\" Sealed Enclosure | Built for ResoNix GUS-15","description":"\u003c!-- ============================================================\n PROLINE X MICRO SERIES — ResoNix GUS-15\n SEALED 15\" ENCLOSURE ONLY\n Color system: Green (#16a34a primary)\n ============================================================ --\u003e\n\u003cstyle\u003e\n .ms-wrap * { box-sizing: border-box; }\n .ms-wrap { font-family: inherit; color: #1e293b; line-height: 1.7; max-width: 1200px; margin: 0 auto; }\n .ms-hero { background: linear-gradient(135deg, #0f172a 0%, #14532d 100%); border-radius: 8px; padding: 40px 36px; margin-bottom: 32px; position: relative; overflow: hidden; }\n .ms-hero::before { content: ''; position: absolute; top: -40px; right: -40px; width: 220px; height: 220px; background: rgba(22,163,74,0.12); border-radius: 50%; }\n .ms-hero-badge { display: inline-block; background: transparent; border: 2px solid #16a34a; color: #86efac; font-size: 0.75em; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; padding: 4px 14px; border-radius: 20px; margin-bottom: 16px; }\n .ms-hero h2 { color: #ffffff; font-size: 1.65em; font-weight: 800; margin: 0 0 14px 0; line-height: 1.25; }\n .ms-hero p { color: #cbd5e1; font-size: 1em; margin: 0 0 24px 0; max-width: 640px; line-height: 1.7; }\n .ms-hero-stats { display: flex; gap: 28px; flex-wrap: wrap; }\n .ms-stat { text-align: center; }\n .ms-stat-num { display: block; color: #86efac; font-size: 1.5em; font-weight: 800; line-height: 1; }\n .ms-stat-label { display: block; color: #94a3b8; font-size: 0.72em; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; }\n .ms-section { background: #ffffff; border: 1px solid #e2e8f0; border-top: 4px solid #16a34a; border-radius: 6px; padding: 28px 32px; margin-bottom: 24px; }\n .ms-section:nth-child(odd) { background: #f8fafc; }\n .ms-section h3 { color: #14532d; font-size: 1.15em; font-weight: 700; margin: 0 0 14px 0; }\n .ms-section p { color: #334155; font-size: 0.97em; margin: 0 0 12px 0; }\n .ms-section p:last-child { margin-bottom: 0; }\n .ms-highlight { background: #f0fdf4; border-left: 5px solid #16a34a; padding: 22px 28px; margin: 28px 0; border-radius: 0 6px 6px 0; }\n .ms-highlight h3 { color: #14532d; margin: 0 0 10px 0; font-size: 1.1em; font-weight: 700; }\n .ms-highlight h3 + h3 { margin-top: 18px; }\n .ms-highlight p { margin-bottom: 10px; color: #1e293b; font-size: 0.97em; }\n .ms-highlight p:last-child { margin-bottom: 0; }\n .ms-alert { background: #dcfce7; border: 1px solid #16a34a; border-radius: 6px; padding: 14px 18px; margin: 20px 0; font-size: 0.93em; color: #166534; }\n .ms-alert strong { color: #14532d; }\n .ms-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 24px 0; }\n @media (max-width: 600px) { .ms-card-grid { grid-template-columns: 1fr; } }\n .ms-card { background: #ffffff; border: 1px solid #e2e8f0; border-top: 3px solid #16a34a; border-radius: 6px; padding: 22px; }\n .ms-card-label { display: inline-block; background: #16a34a; color: #ffffff; font-size: 0.68em; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 3px 10px; border-radius: 3px; margin-bottom: 10px; }\n .ms-card h4 { color: #14532d; font-size: 1em; font-weight: 700; margin: 0 0 10px 0; }\n .ms-card-divider { height: 2px; background: #16a34a; width: 32px; margin-bottom: 12px; border-radius: 2px; }\n .ms-card p { font-size: 0.93em; color: #475569; margin: 0; line-height: 1.65; }\n .ms-card p strong { color: #14532d; }\n .ms-warranty { background: #0f172a; border-left: 5px solid #16a34a; border-radius: 0 6px 6px 0; padding: 20px 28px; margin: 28px 0; display: flex; align-items: center; gap: 20px; }\n .ms-warranty-badge { background: #16a34a; color: #ffffff; font-size: 1em; font-weight: 800; padding: 10px 16px; border-radius: 4px; white-space: nowrap; }\n .ms-warranty p { color: #cbd5e1; font-size: 0.93em; margin: 0; line-height: 1.6; }\n .ms-warranty strong { color: #ffffff; }\n .ms-fitment { list-style: none; margin: 14px 0 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }\n @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n .ms-fitment li { font-size: 0.93em; color: #334155; padding: 8px 12px; background: #f0fdf4; border-left: 3px solid #16a34a; border-radius: 0 4px 4px 0; }\n .ms-divider { border: none; border-top: 1px solid #e2e8f0; margin: 32px 0; }\n .ms-langboard { font-weight: 700; color: #14532d; }\n\u003c\/style\u003e\n\u003cdiv class=\"ms-wrap\"\u003e\n\u003c!-- HERO --\u003e\n\u003cdiv class=\"ms-hero\"\u003e\n\u003cspan class=\"ms-hero-badge\"\u003eMicro Series | GUS-15 | Enclosure Only\u003c\/span\u003e\n\u003ch2\u003eA Shallow 15\" Built Around Real Engineering.\u003cbr\u003e1.42 cu ft. Exactly Right.\u003c\/h2\u003e\n\u003cp\u003eThe ResoNix GUS-15 produces 1,500 watts RMS from 5.93 inches of mounting depth with Klippel-verified Xmax of 25.89mm. ResoNix publishes a 0.707 Qtc target of 1.35 cubic feet. Add the driver's 0.072 cubic foot displacement and the correct gross build volume is 1.422 cu ft. This enclosure delivers 1.42 cubic feet net, the most structurally demanding, highest-power single-driver build in the Proline X Micro Series.\u003c\/p\u003e\n\u003cdiv class=\"ms-hero-stats\"\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e1.42\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net: Displacement Correct\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e8.25\"\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eTotal Depth\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e17.11\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eDriver Fs (Hz)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e1,500W\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eDriver RMS Rating\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n\u003cdiv class=\"ms-alert\"\u003e\n\u003cstrong\u003eEnclosure only.\u003c\/strong\u003e The ResoNix GUS-15 subwoofer is not included and must be purchased separately from ResoNix Sound Solutions. This enclosure is designed exclusively for the GUS-15, the cutout geometry and volume target are specific to this driver.\u003c\/div\u003e\n\u003c!-- SECTION 1: Volume Math --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003e1.42 cu ft: How the Volume Was Calculated\u003c\/h3\u003e\n\u003cp\u003eResoNix recommends 1.35 cubic feet of net acoustic airspace for the GUS-15 to achieve 0.707 Qtc. The GUS-15 has a published driver displacement of 0.072 cubic feet. Building to a gross volume of 1.35 cubic feet and installing the driver would leave only 1.278 cubic feet net. Noticeably below the recommendation. The correct build target is 1.35 + 0.072 = 1.422 cubic feet gross, so that after driver displacement is subtracted the driver sees exactly 1.35 cubic feet of net acoustic airspace.\u003c\/p\u003e\n\u003cp\u003eThis enclosure delivers \u003cstrong\u003e1.42 cubic feet net\u003c\/strong\u003e after displacement. Matching ResoNix's acoustic volume recommendation accurately. The 1.42 figure is the net acoustic volume the driver sees, not the gross box volume before displacement is accounted for.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 2: Driver Context --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003eThe GUS-15 in a Sealed Enclosure: What the Numbers Mean\u003c\/h3\u003e\n\u003cp\u003eThe GUS-15's published T\/S parameters (D4 variant) show Fs at 17.11 Hz and Qts at 0.34. At 1.35 cubic feet sealed, the system Qtc targets 0.707. Flat anechoic response extending well below 20 Hz. The 15\" cone area (Sd of 804.25 cm²) combined with 25.89mm of Klippel-verified one-way Xmax produces a displacement volume that translates directly to output. A 15\" driver at this Xmax in the correct sealed enclosure delivers low-frequency output that no shallow 12\", including the GUS-12, can match at the same power level.\u003c\/p\u003e\n\u003cp\u003eLike the GUS-12, this is an SQ-oriented driver engineered for accuracy and deep extension. The 0.707 Qtc alignment produces a flat anechoic response with the low-frequency reach the driver's motor and suspension are designed to deliver. In a vehicle cabin, boundary gain below 80 Hz reinforces the driver's deep extension in the listening position. The GUS-15 in this enclosure is the most capable shallow-mount bass system available at this depth.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 3: Construction --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003e1,500W RMS Demands a Different Level of Construction\u003c\/h3\u003e\n\u003cp\u003eAt 1,500 watts RMS the GUS-15 generates more internal pressure than any other single driver in the Micro Series lineup by a significant margin. The front baffle is a double-layer stack-fab build, two CNC-cut Langboard Elite MDF panels bonded to 1.5 inches total thickness. The stack-fab assembly is further reinforced with dowels throughout the build, adding mechanical alignment and shear resistance at every panel joint beyond what layer adhesion alone provides.\u003c\/p\u003e\n\u003cp\u003eThe 8.25-inch total depth gives panel walls more inherent geometric rigidity than the ultra-shallow builds in this series, but at 1,500 watts the increased excursion load and cone area of a 15\" driver means the structural demands on every panel and joint are correspondingly higher. Langboard Elite MDF at 200 psi internal bond and 410,000 psi MOE is the correct panel spec for this application, not because it is the cheapest option that passes, but because it is the named, documented spec that holds under sustained high-power use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- WHY CARDS --\u003e\n\u003cdiv class=\"ms-card-grid\"\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n\u003ch4\u003e1.42 cu ft Net: 1.35 Target + 0.072 Displacement\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eResoNix's 0.707 Qtc target is \u003cstrong\u003e1.35 cu ft net\u003c\/strong\u003e. GUS-15 driver displacement is \u003cstrong\u003e0.072 cu ft\u003c\/strong\u003e. This enclosure is built to 1.35 + 0.072 = 1.422 gross volume, delivering exactly 1.35 cu ft net acoustic airspace after the driver is installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eOutput\u003c\/span\u003e\n\u003ch4\u003eKlippel-Verified 25.89mm Xmax: 15\" Cone Area\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eXmax of \u003cstrong\u003e25.89mm at BL 70%\u003c\/strong\u003e across a \u003cstrong\u003e804.25 cm² effective cone area\u003c\/strong\u003e: the combination that defines real-world output capability. This is measured performance on a Klippel LSI system, not a manufacturer Xmax claim.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eBaffle\u003c\/span\u003e\n\u003ch4\u003e1.5\" Double-Layer: Dowel Reinforced Stack Fab\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eTwo bonded layers of \u003cstrong\u003eLangboard Elite 3\/4\" MDF\u003c\/strong\u003e at 1.5 inches total, further reinforced with \u003cstrong\u003edowels throughout the stack-fab assembly\u003c\/strong\u003e. At 1,500 watts RMS, baffle resonance and panel flex are structural failure modes. This construction eliminates both.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n\u003ch4\u003e8\/32 Threaded Inserts: Machine Screws Included\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe baffle is fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e on the back face. Stainless machine screws are included. The GUS-15 mounts to steel, not MDF. Consistent clamping force at all mounting points, no stripping under sustained 1,500-watt operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eWiring\u003c\/span\u003e\n\u003ch4\u003eProline X Terminal Cup: Pre-Wired with 12g OFC\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with \u003cstrong\u003e12-gauge OFC\u003c\/strong\u003e internally. Connect your amplifier run to the terminal and mount the driver. ResoNix recommends 10-gauge speaker wire from terminal to driver at 1Ω loads to maintain damping factor. Factor this into your wiring plan.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eCutout\u003c\/span\u003e\n\u003ch4\u003eDirect-Fit: Machined for the GUS-15\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe baffle cutout is machined to the \u003cstrong\u003eGUS-15's mounting diameter\u003c\/strong\u003e. The driver seals against its included rubber mounting ring gasket and mounts to the threaded inserts, no shimming, trimming, or gasketing tape required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eConfiguration\u003c\/span\u003e\n\u003ch4\u003eFront-Firing or Downfiring: Feet Included\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eRubber feet for \u003cstrong\u003edownfiring installation\u003c\/strong\u003e are included. The GUS-15's vented rear cone assembly allows the pole vent to be fully obstructed without acoustic penalty. Downfire in a tight install is viable. ResoNix notes minimal real-world difference between orientations; choose based on install practicality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eAcoustic\u003c\/span\u003e\n\u003ch4\u003ePolyfill Pre-Installed\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003ePolyfill is factory-installed. It acoustically dampens internal panel reflections without artificially altering volume. \u003cstrong\u003eFactory installation\u003c\/strong\u003e ensures consistent packing density across every unit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eReinforcement\u003c\/span\u003e\n\u003ch4\u003eDowel-Reinforced Stack Fab, 1,500W Structural Standard\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eDowels throughout the stack-fab assembly add mechanical alignment and shear resistance at panel joints independent of adhesive condition. At 1,500 watts RMS the lateral and outward forces on panel joints are the highest of any single-driver build in this series. \u003cstrong\u003estack-fab construction + adhesive + dowels\u003c\/strong\u003e: all three systems working together.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- HIGHLIGHT --\u003e\n\u003cdiv class=\"ms-highlight\"\u003e\n\u003ch3\u003eReady to Mount. Ready to Wire. Built for Active Systems.\u003c\/h3\u003e\n\u003cp\u003eThe enclosure ships fully prepped. The \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with 12-gauge OFC. Connect your amplifier run and wiring is complete. The double-layer baffle uses \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless machine screws included. \u003cstrong\u003eRubber feet for downfiring\u003c\/strong\u003e are included. Polyfill is factory-installed. Minimum front clearance for the GUS-15 is 33mm. Confirm this against your install location before mounting.\u003c\/p\u003e\n\u003ch3\u003eImpedance Options: D2 and D4\u003c\/h3\u003e\n\u003cp\u003eThe GUS-15 is available as a \u003cstrong\u003eDual 2-ohm (D2)\u003c\/strong\u003e and \u003cstrong\u003eDual 4-ohm (D4)\u003c\/strong\u003e. D2 T\/S parameters are not yet finalized by ResoNix. D4 data is published and is the basis for this enclosure's volume calculation. Wire the D4 parallel for 2 ohms, series for 8 ohms. Wire the D2 parallel for 1 ohm, series for 4 ohms. At 1 ohm, use an amplifier explicitly rated for sustained 1-ohm operation. At 2 ohms, target a monoblock delivering 1,000–1,500 watts RMS. Do not exceed 1,500 watts RMS. ResoNix is explicit that overpower damage is not covered under warranty.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- FITMENT --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n\u003cp\u003eAt 28\" × 17.5\" × 8.25\" and roughly 40+ lbs, this is the largest enclosure in the Micro Series. The 8.25\" depth is what makes it viable in locations a conventional 1.35 cu ft sealed 15\" box, typically 14–18\" deep, cannot reach. Measure carefully before ordering:\u003c\/p\u003e\n\u003cul class=\"ms-fitment\"\u003e\n\u003cli\u003eTrunk floor: full-size sedans, sport sedans, wagons\u003c\/li\u003e\n\u003cli\u003eFlat cargo floor: mid-size and full-size SUVs\u003c\/li\u003e\n\u003cli\u003eBehind-seat: full-size crew cab trucks with rear seat removed\u003c\/li\u003e\n\u003cli\u003eUnder rear bench: full-size SUVs and vans\u003c\/li\u003e\n\u003cli\u003eSQ competition builds, where depth is the constraint and output is the goal\u003c\/li\u003e\n\u003cli\u003eHigh-output daily builds: systems targeting maximum extension\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- WARRANTY --\u003e\n\u003cdiv class=\"ms-warranty\"\u003e\n\u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures carry a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Built and inspected in our Tullahoma, Tennessee facility before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr class=\"ms-divider\"\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n\u003cp\u003eEvery Proline X Micro Series enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee on ShopSabre CNC routers. Internal volume, cutout geometry, baffle layer count, dowel placement, and terminal positioning are all held to spec on every unit. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e throughout: named, mill-documented, published density and bond specifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ============================================================\n SPECS TABLE — drop into Specifications metafield\n ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================\n CHEAT SHEET — drop into Quick Specs metafield\n ============================================================ --\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43172508860505,"sku":"M15-S Gus","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-15-sealed-enclosure-fits-resonix-gus-15subwoofer-enclosuresproline-x-8488636.webp?v=1778784609"},{"product_id":"proline-x-micro-series-10-sealed-enclosure-fits-alpine-rsw10","title":"Proline X Micro Series 10\" Sealed Enclosure - Fits Alpine RSW10","description":"\u003c!-- ============================================================\n     PROLINE X MICRO SERIES — ALPINE RS-W10D4\n     SEALED 10\" ENCLOSURE ONLY\n     Color system: Green (#16a34a primary)\n     ============================================================ --\u003e\n\n\u003cstyle\u003e\n  .ms-wrap * { box-sizing: border-box; }\n  .ms-wrap { font-family: inherit; color: #1e293b; line-height: 1.7; max-width: 1200px; margin: 0 auto; }\n  .ms-hero { background: linear-gradient(135deg, #0f172a 0%, #14532d 100%); border-radius: 8px; padding: 40px 36px; margin-bottom: 32px; position: relative; overflow: hidden; }\n  .ms-hero::before { content: ''; position: absolute; top: -40px; right: -40px; width: 220px; height: 220px; background: rgba(22,163,74,0.12); border-radius: 50%; }\n  .ms-hero-badge { display: inline-block; background: transparent; border: 2px solid #16a34a; color: #86efac; font-size: 0.75em; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; padding: 4px 14px; border-radius: 20px; margin-bottom: 16px; }\n  .ms-hero h2 { color: #ffffff; font-size: 1.65em; font-weight: 800; margin: 0 0 14px 0; line-height: 1.25; }\n  .ms-hero p { color: #cbd5e1; font-size: 1em; margin: 0 0 24px 0; max-width: 640px; line-height: 1.7; }\n  .ms-hero-stats { display: flex; gap: 28px; flex-wrap: wrap; }\n  .ms-stat { text-align: center; }\n  .ms-stat-num { display: block; color: #86efac; font-size: 1.5em; font-weight: 800; line-height: 1; }\n  .ms-stat-label { display: block; color: #94a3b8; font-size: 0.72em; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; }\n  .ms-section { background: #ffffff; border: 1px solid #e2e8f0; border-top: 4px solid #16a34a; border-radius: 6px; padding: 28px 32px; margin-bottom: 24px; }\n  .ms-section:nth-child(odd) { background: #f8fafc; }\n  .ms-section h3 { color: #14532d; font-size: 1.15em; font-weight: 700; margin: 0 0 14px 0; }\n  .ms-section p { color: #334155; font-size: 0.97em; margin: 0 0 12px 0; }\n  .ms-section p:last-child { margin-bottom: 0; }\n  .ms-highlight { background: #f0fdf4; border-left: 5px solid #16a34a; padding: 22px 28px; margin: 28px 0; border-radius: 0 6px 6px 0; }\n  .ms-highlight h3 { color: #14532d; margin: 0 0 10px 0; font-size: 1.1em; font-weight: 700; }\n  .ms-highlight h3 + h3 { margin-top: 18px; }\n  .ms-highlight p { margin-bottom: 10px; color: #1e293b; font-size: 0.97em; }\n  .ms-highlight p:last-child { margin-bottom: 0; }\n  .ms-alert { background: #dcfce7; border: 1px solid #16a34a; border-radius: 6px; padding: 14px 18px; margin: 20px 0; font-size: 0.93em; color: #166534; }\n  .ms-alert strong { color: #14532d; }\n  .ms-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 24px 0; }\n  @media (max-width: 600px) { .ms-card-grid { grid-template-columns: 1fr; } }\n  .ms-card { background: #ffffff; border: 1px solid #e2e8f0; border-top: 3px solid #16a34a; border-radius: 6px; padding: 22px; }\n  .ms-card-label { display: inline-block; background: #16a34a; color: #ffffff; font-size: 0.68em; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 3px 10px; border-radius: 3px; margin-bottom: 10px; }\n  .ms-card h4 { color: #14532d; font-size: 1em; font-weight: 700; margin: 0 0 10px 0; }\n  .ms-card-divider { height: 2px; background: #16a34a; width: 32px; margin-bottom: 12px; border-radius: 2px; }\n  .ms-card p { font-size: 0.93em; color: #475569; margin: 0; line-height: 1.65; }\n  .ms-card p strong { color: #14532d; }\n  .ms-warranty { background: #0f172a; border-left: 5px solid #16a34a; border-radius: 0 6px 6px 0; padding: 20px 28px; margin: 28px 0; display: flex; align-items: center; gap: 20px; }\n  .ms-warranty-badge { background: #16a34a; color: #ffffff; font-size: 1em; font-weight: 800; padding: 10px 16px; border-radius: 4px; white-space: nowrap; }\n  .ms-warranty p { color: #cbd5e1; font-size: 0.93em; margin: 0; line-height: 1.6; }\n  .ms-warranty strong { color: #ffffff; }\n  .ms-fitment { list-style: none; margin: 14px 0 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }\n  @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n  .ms-fitment li { font-size: 0.93em; color: #334155; padding: 8px 12px; background: #f0fdf4; border-left: 3px solid #16a34a; border-radius: 0 4px 4px 0; }\n  .ms-divider { border: none; border-top: 1px solid #e2e8f0; margin: 32px 0; }\n  .ms-langboard { font-weight: 700; color: #14532d; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ms-wrap\"\u003e\n\n  \u003c!-- HERO --\u003e\n  \u003cdiv class=\"ms-hero\"\u003e\n    \u003cspan class=\"ms-hero-badge\"\u003eMicro Series | Alpine RS-W10D4 | Enclosure Only\u003c\/span\u003e\n    \u003ch2\u003eBuilt for the Alpine RS-W10D4.\u003cbr\u003e0.50 cu ft. 5.25\" Deep.\u003c\/h2\u003e\n    \u003cp\u003eThe Alpine RS-W10D4 is a high-Qts shallow-mount driver. 600 watts RMS, 20mm Xmax, and a Qts of 1.19 that makes it forgiving in compact sealed enclosures and naturally impactful in daily-driver applications. The Proline X Micro Series enclosure delivers 0.50 cubic feet of sealed airspace in a double-layer stack-fab build that is 5.25 inches deep, the same shell as the JL 10TW3 build, matched to the Alpine's specific cutout geometry.\u003c\/p\u003e\n    \u003cdiv class=\"ms-hero-stats\"\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e0.50\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net Volume\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e5.25\"\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eTotal Depth\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e1.19\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eDriver Qts\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e600W\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eDriver RMS Rating\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n  \u003cdiv class=\"ms-alert\"\u003e\n    \u003cstrong\u003eEnclosure only.\u003c\/strong\u003e The Alpine RS-W10D4 subwoofer is not included. This enclosure is designed for customers who already own or are separately purchasing the RS-W10D4.\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 1: Volume and Qts --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eHigh-Qts Driver, Compact Sealed Box: What That Actually Means\u003c\/h3\u003e\n    \u003cp\u003eThe Alpine RS-W10D4 has a published Qts of 1.19, one of the highest in the Micro Series lineup. A high Qts in a sealed enclosure produces an elevated system Qtc, which means the driver's low-frequency output rises gently before rolling off rather than dropping flat at the box resonance. At 0.50 cubic feet, the RS-W10D4's system Qtc will be well above 1.0, which produces a warm, impactful bass character with good efficiency in the upper bass range.\u003c\/p\u003e\n    \u003cp\u003eAlpine publishes three sealed volume targets for this driver: 0.54 cu ft for a -3dB point at 32 Hz, 0.79 cu ft for -3dB at 30 Hz, and 1.04 cu ft for -3dB at 28 Hz. At 0.50 cubic feet this enclosure falls just below the smallest published target, which shifts the effective extension point slightly upward in exchange for maximum output efficiency in the 50–80 Hz range. For a daily-driver under-seat or behind-seat install, this is the practical tradeoff, a compact box that punches hard where the listener feels it most. If deeper anechoic extension is the priority, the larger published volumes require a box this format cannot deliver.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 2: Construction --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eDouble-Layer 1.5\" Baffle, Stack Fab, Dado Joinery, Dowel Reinforced\u003c\/h3\u003e\n    \u003cp\u003eThe front baffle is a double-layer stack-fab build, two CNC-cut Langboard Elite MDF panels bonded to 1.5 inches total thickness. At 600 watts RMS and 20mm Xmax on a 10\" cone, the baffle carries a sustained mechanical load that a single 3\/4\" panel will resonate under over time. Two bonded layers eliminate baffle resonance at the structural level. The stack-fab assembly is further reinforced with dowels throughout, adding mechanical alignment and shear resistance at every panel joint beyond what dado joinery and adhesive alone provide.\u003c\/p\u003e\n    \u003cp\u003eEvery panel joint uses CNC-cut interlocking dado slots, mechanical interlock before adhesive, adhesive seal after. The 5.25-inch total depth is the same shell geometry as the JL 10TW3 enclosure, with the baffle machined to the Alpine's specific cutout diameter rather than the JL's tab-ear geometry.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WHY CARDS --\u003e\n  \u003cdiv class=\"ms-card-grid\"\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n      \u003ch4\u003e0.50 cu ft: Compact and Output-Efficient\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eAt 0.50 cubic feet, the RS-W10D4's high Qts produces a warm, elevated Qtc that maximizes output efficiency in the upper bass range. Alpine's smallest published sealed target is 0.54 cu ft, this enclosure lands just below, producing a \u003cstrong\u003eslightly elevated Qtc\u003c\/strong\u003e that suits daily-driver impact-focused installs.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eDepth\u003c\/span\u003e\n      \u003ch4\u003e5.25\" Total: 3.25\" Driver Clearance with Margin\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe RS-W10D4 requires \u003cstrong\u003e3.25\" of mounting depth\u003c\/strong\u003e. The enclosure provides sufficient clearance for the driver's rear motor structure at full excursion. At 5.25\" total depth this enclosure fits behind and under seats where conventional 10\" sealed boxes cannot.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eBaffle\u003c\/span\u003e\n      \u003ch4\u003e1.5\" Double-Layer: Dowel Reinforced Stack Fab\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eTwo bonded layers of \u003cstrong\u003eLangboard Elite 3\/4\" MDF\u003c\/strong\u003e at 1.5 inches total, further reinforced with \u003cstrong\u003edowels throughout the stack-fab assembly\u003c\/strong\u003e. At 600 watts RMS, baffle resonance at the panel level adds coloration. Double-layer construction with dowel reinforcement eliminates it.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n      \u003ch4\u003e8\/32 Threaded Inserts: Machine Screws Included\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe baffle is fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e on the back face. Stainless machine screws are included. The RS-W10D4 mounts to steel, not MDF. Consistent clamping force, no stripping risk, and clean driver reinstallation when service is needed.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eWiring\u003c\/span\u003e\n      \u003ch4\u003eProline X Terminal Cup: Pre-Wired with 12g OFC\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with \u003cstrong\u003e12-gauge OFC\u003c\/strong\u003e run internally to the driver location. Connect your amplifier run to the terminal and mount the driver. No internal wiring work required.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eCutout\u003c\/span\u003e\n      \u003ch4\u003eDirect-Fit Alpine Geometry: Standard Round Flange\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eThe RS-W10D4 uses a \u003cstrong\u003estandard round mounting flange\u003c\/strong\u003e. The baffle cutout is machined to the Alpine's specific cutout diameter, the driver seats flush, seals against the gasket, and mounts to the threaded inserts without shimming or modification.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eConfiguration\u003c\/span\u003e\n      \u003ch4\u003eFront-Firing or Downfiring: Feet Included\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eRubber feet for \u003cstrong\u003edownfiring installation\u003c\/strong\u003e are included. Run it front-firing in a standard orientation or flip it downward to couple bass output with the vehicle floor. Downfiring is effective in truck cabs and SUVs where floor coupling enhances the perceived bass response.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eAcoustic\u003c\/span\u003e\n      \u003ch4\u003ePolyfill Pre-Installed\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003ePolyfill is packed and installed at the factory. It acoustically increases the effective internal volume, extending low-frequency output without adding external size. \u003cstrong\u003eFactory installation\u003c\/strong\u003e ensures consistent packing density across every unit.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eReinforcement\u003c\/span\u003e\n      \u003ch4\u003eDowel-Reinforced Stack Fab: Mechanical Strength at Every Joint\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eDowels throughout the stack-fab assembly add mechanical alignment and shear resistance at panel joints independent of adhesive condition. Combined with \u003cstrong\u003edado joinery and adhesive\u003c\/strong\u003e, every joint in this enclosure is locked by three independent mechanical systems.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- HIGHLIGHT --\u003e\n  \u003cdiv class=\"ms-highlight\"\u003e\n    \u003ch3\u003eReady to Mount. Ready to Wire. Ready to Downfire.\u003c\/h3\u003e\n    \u003cp\u003eThe enclosure ships fully prepped. The \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with 12-gauge OFC. Connect your amplifier run and wiring is complete. The double-layer baffle uses \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless machine screws included. \u003cstrong\u003eRubber feet for downfiring\u003c\/strong\u003e are included. Polyfill is already factory-installed.\u003c\/p\u003e\n    \u003ch3\u003eImpedance Options: D4 Wiring\u003c\/h3\u003e\n    \u003cp\u003eThe RS-W10D4 has dual 4-ohm voice coils. Wire the two coils \u003cstrong\u003ein parallel for a 2-ohm load\u003c\/strong\u003e, or \u003cstrong\u003ein series for an 8-ohm load\u003c\/strong\u003e. Most builds run parallel at 2 ohms into a 2-ohm-stable monoblock in the 400–600 watt RMS range. Confirm your amplifier's stable impedance before wiring. The RS-W10D4's high Qts means it will produce audible output even when moderately underpowered. It is a forgiving driver to match.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FITMENT --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n    \u003cp\u003eAt 21.5\" × 14.5\" × 5.25\", this enclosure fits in the same tight installations as the JL 10TW3 version of the same shell. Common placements:\u003c\/p\u003e\n    \u003cul class=\"ms-fitment\"\u003e\n      \u003cli\u003eUnder-seat: extended cab and crew cab trucks\u003c\/li\u003e\n      \u003cli\u003eBehind-seat: full-size truck cabs (front-firing or downfire)\u003c\/li\u003e\n      \u003cli\u003eTrunk corners: compact and mid-size sedans\u003c\/li\u003e\n      \u003cli\u003eSide cargo panels: SUVs and crossovers\u003c\/li\u003e\n      \u003cli\u003eHatch floor: sports cars and hatchbacks\u003c\/li\u003e\n      \u003cli\u003eSpare tire well: select SUV and crossover platforms\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WARRANTY --\u003e\n  \u003cdiv class=\"ms-warranty\"\u003e\n    \u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n    \u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures carry a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Built and inspected in our Tullahoma, Tennessee facility before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003chr class=\"ms-divider\"\u003e\n\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n    \u003cp\u003eEvery Proline X Micro Series enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee on ShopSabre CNC routers. Internal volume, cutout geometry, dado joint depth, baffle layer count, dowel placement, and terminal positioning are all held to spec on every unit. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e throughout: named, mill-documented, published density and bond specifications.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\n\u003c!-- ============================================================\n     SPECS TABLE — drop into Specifications metafield\n     ============================================================ --\u003e\n\u003c!--\n\u003ctable width=\"100%\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCompatible Driver\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eAlpine RS-W10D4 (Dual 4-Ohm)\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eEnclosure Type\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSealed\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eInternal Volume (Net)\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e0.50 Cubic Feet\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eLangboard Elite 3\/4\" MDF\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eCNC-Cut Stack Fab \/ Dado Joinery \/ Dowel Reinforced\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFront Panel Thickness\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1.5 Inches (Double-Layer Stack Fab)\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eExternal Width\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e21.5 Inches\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eExternal Height\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e14.5 Inches\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eExternal Depth\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e5.25 Inches\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eMax Mounting Depth\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e3.25 Inches\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eWoofer Opening\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eDirect Fit — Alpine RS-W10D4\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eDriver Mounting\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e8\/32 Threaded Inserts — Stainless Machine Screws Included\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eTerminal Cup\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eProline X Terminal Cup — Pre-Wired\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eInternal Wiring\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e12-Gauge OFC (Oxygen-Free Copper)\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003ePolyfill\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003ePre-Installed\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFiring Direction\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eFront-Firing or Downfiring\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eDownfire Feet\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eIncluded\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003ePlush Black Automotive Carpet\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e2 Years — Proline X \/ Audio Intensity\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eMade In\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eTullahoma, Tennessee, USA\u003c\/td\u003e\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\nNOTE: Weight not confirmed — add before publishing.\n--\u003e\n\n\n\u003c!-- ============================================================\n     CHEAT SHEET — drop into Quick Specs metafield\n     ============================================================ --\u003e\n\u003c!--\n\u003cul class=\"cheat-sheet-list\"\u003e\n  \u003cli\u003e\u003cstrong\u003eBest For:\u003c\/strong\u003e Daily-driver installs — under-seat and behind-seat trucks, tight trunk and cargo builds\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003ePower:\u003c\/strong\u003e Rated for up to 600W RMS (Alpine RS-W10D4)\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eTopology\/Class:\u003c\/strong\u003e Sealed \/ Double-Layer Stack Fab \/ Dowel Reinforced \/ Front-Fire or Downfire\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eSonic Character:\u003c\/strong\u003e Warm, impactful daily-driver bass — high-Qts driver delivers strong upper-bass presence in a 5.25\" compact sealed build\u003c\/li\u003e\n\u003c\/ul\u003e\n--\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43172667162713,"sku":"M10-S ALP","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-10-sealed-enclosure-fits-alpine-rsw10subwoofer-enclosuresproline-x-5431752.jpg?v=1774423520"},{"product_id":"proline-x-micro-series-dual-10-sealed-enclosure-fits-wavtech-thinpro-10","title":"Proline X Micro Series Dual 10\" Sealed Enclosure - Fits Wavtech thinPRO10","description":"\u003c!-- ============================================================\n     PROLINE X MICRO SERIES — DUAL 10\" M10D-S WAV\n     DUAL WAVTECH thinPRO 10 | SEALED | ENCLOSURE ONLY\n     Color system: Green (#16a34a primary)\n     ============================================================ --\u003e\n\n\u003cstyle\u003e\n  .ms-wrap * { box-sizing: border-box; }\n  .ms-wrap { font-family: inherit; color: #1e293b; line-height: 1.7; max-width: 1200px; margin: 0 auto; }\n  .ms-hero { background: linear-gradient(135deg, #0f172a 0%, #14532d 100%); border-radius: 8px; padding: 40px 36px; margin-bottom: 32px; position: relative; overflow: hidden; }\n  .ms-hero::before { content: ''; position: absolute; top: -40px; right: -40px; width: 220px; height: 220px; background: rgba(22,163,74,0.12); border-radius: 50%; }\n  .ms-hero-badge { display: inline-block; background: transparent; border: 2px solid #16a34a; color: #86efac; font-size: 0.75em; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; padding: 4px 14px; border-radius: 20px; margin-bottom: 16px; }\n  .ms-hero h2 { color: #ffffff; font-size: 1.65em; font-weight: 800; margin: 0 0 14px 0; line-height: 1.25; }\n  .ms-hero p { color: #cbd5e1; font-size: 1em; margin: 0 0 24px 0; max-width: 660px; line-height: 1.7; }\n  .ms-hero-stats { display: flex; gap: 28px; flex-wrap: wrap; }\n  .ms-stat { text-align: center; }\n  .ms-stat-num { display: block; color: #86efac; font-size: 1.5em; font-weight: 800; line-height: 1; }\n  .ms-stat-label { display: block; color: #94a3b8; font-size: 0.72em; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; }\n  .ms-section { background: #ffffff; border: 1px solid #e2e8f0; border-top: 4px solid #16a34a; border-radius: 6px; padding: 28px 32px; margin-bottom: 24px; }\n  .ms-section:nth-child(odd) { background: #f8fafc; }\n  .ms-section h3 { color: #14532d; font-size: 1.15em; font-weight: 700; margin: 0 0 14px 0; }\n  .ms-section p { color: #334155; font-size: 0.97em; margin: 0 0 12px 0; }\n  .ms-section p:last-child { margin-bottom: 0; }\n  .ms-highlight { background: #f0fdf4; border-left: 5px solid #16a34a; padding: 22px 28px; margin: 28px 0; border-radius: 0 6px 6px 0; }\n  .ms-highlight h3 { color: #14532d; margin: 0 0 10px 0; font-size: 1.1em; font-weight: 700; }\n  .ms-highlight h3 + h3 { margin-top: 18px; }\n  .ms-highlight p { margin-bottom: 10px; color: #1e293b; font-size: 0.97em; }\n  .ms-highlight p:last-child { margin-bottom: 0; }\n  .ms-alert { background: #dcfce7; border: 1px solid #16a34a; border-radius: 6px; padding: 14px 18px; margin: 20px 0; font-size: 0.93em; color: #166534; }\n  .ms-alert strong { color: #14532d; }\n  .ms-wiring { background: #0f172a; border-radius: 6px; padding: 24px 28px; margin: 24px 0; }\n  .ms-wiring h3 { color: #86efac; font-size: 1em; font-weight: 700; margin: 0 0 16px 0; letter-spacing: 0.05em; text-transform: uppercase; }\n  .ms-wiring-row { display: flex; align-items: center; gap: 14px; padding: 10px 0; border-bottom: 1px solid #1e293b; }\n  .ms-wiring-row:last-child { border-bottom: none; padding-bottom: 0; }\n  .ms-wiring-load { background: #16a34a; color: #ffffff; font-size: 1.1em; font-weight: 800; padding: 8px 16px; border-radius: 4px; min-width: 60px; text-align: center; }\n  .ms-wiring-desc { color: #cbd5e1; font-size: 0.93em; line-height: 1.5; }\n  .ms-wiring-desc strong { color: #ffffff; }\n  .ms-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 24px 0; }\n  @media (max-width: 600px) { .ms-card-grid { grid-template-columns: 1fr; } }\n  .ms-card { background: #ffffff; border: 1px solid #e2e8f0; border-top: 3px solid #16a34a; border-radius: 6px; padding: 22px; }\n  .ms-card-label { display: inline-block; background: #16a34a; color: #ffffff; font-size: 0.68em; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 3px 10px; border-radius: 3px; margin-bottom: 10px; }\n  .ms-card h4 { color: #14532d; font-size: 1em; font-weight: 700; margin: 0 0 10px 0; }\n  .ms-card-divider { height: 2px; background: #16a34a; width: 32px; margin-bottom: 12px; border-radius: 2px; }\n  .ms-card p { font-size: 0.93em; color: #475569; margin: 0; line-height: 1.65; }\n  .ms-card p strong { color: #14532d; }\n  .ms-warranty { background: #0f172a; border-left: 5px solid #16a34a; border-radius: 0 6px 6px 0; padding: 20px 28px; margin: 28px 0; display: flex; align-items: center; gap: 20px; }\n  .ms-warranty-badge { background: #16a34a; color: #ffffff; font-size: 1em; font-weight: 800; padding: 10px 16px; border-radius: 4px; white-space: nowrap; }\n  .ms-warranty p { color: #cbd5e1; font-size: 0.93em; margin: 0; line-height: 1.6; }\n  .ms-warranty strong { color: #ffffff; }\n  .ms-fitment { list-style: none; margin: 14px 0 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }\n  @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n  .ms-fitment li { font-size: 0.93em; color: #334155; padding: 8px 12px; background: #f0fdf4; border-left: 3px solid #16a34a; border-radius: 0 4px 4px 0; }\n  .ms-divider { border: none; border-top: 1px solid #e2e8f0; margin: 32px 0; }\n  .ms-langboard { font-weight: 700; color: #14532d; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ms-wrap\"\u003e\n\n  \u003c!-- HERO --\u003e\n  \u003cdiv class=\"ms-hero\"\u003e\n    \u003cspan class=\"ms-hero-badge\"\u003eMicro Series | Dual thinPRO 10 | Enclosure Only\u003c\/span\u003e\n    \u003ch2\u003eDual 10\". 4.5 Inches Deep.\u003cbr\u003e0.40 cu ft Per Chamber: Wavtech's Optimum.\u003c\/h2\u003e\n    \u003cp\u003eTwo Wavtech thinPRO 10 drivers. Two isolated sealed chambers. Each chamber holds 0.40 cubic feet of net airspace, which after driver displacement accounts for exactly Wavtech's 0.35 cubic foot sweet spot. The M10D-S WAV delivers dual 10\" output from a 44-inch wide, 4.5-inch deep footprint designed for full-width behind-seat truck installs and wide cargo floor applications where a conventional dual 10\" build would never fit.\u003c\/p\u003e\n    \u003cdiv class=\"ms-hero-stats\"\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e0.80\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net Total\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e0.40\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCu Ft Per Chamber\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e4.5\"\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eTotal Depth\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e1,500W\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCombined RMS Rating\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n  \u003cdiv class=\"ms-alert\"\u003e\n    \u003cstrong\u003eEnclosure only.\u003c\/strong\u003e Wavtech thinPRO 10 subwoofers are not included and must be purchased separately. This enclosure accepts both the thinPRO10-2 (Single 2Ω) and thinPRO10-4 (Single 4Ω). Final load depends on which variant you choose and how they are wired.\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 1: Volume --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003e0.40 cu ft Per Chamber, Net After Displacement, Optimum Acoustic Airspace\u003c\/h3\u003e\n    \u003cp\u003eWavtech publishes a sealed sweet spot of 0.35 cubic feet for the thinPRO 10, with an acceptable range of 0.25–0.80 cubic feet. The M10D-S WAV delivers 0.40 cubic feet of net volume per chamber. That figure already accounts for driver displacement. Each thinPRO 10 sees 0.35 cubic feet of net acoustic airspace after its own displacement is subtracted from the 0.40 cubic foot chamber. This puts each driver precisely at Wavtech's published optimum, not approximately near it.\u003c\/p\u003e\n    \u003cp\u003eRunning two drivers in a shared enclosure is not a matter of doubling a single-driver box. Each driver needs its own acoustically isolated chamber to load correctly. The M10D-S WAV uses a dual-chamber construction with a CNC-cut, dado-jointed chamber divider. Neither driver shares airspace with the other. Each chamber independently delivers the correct volume for the thinPRO 10's T\/S parameters.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 2: Construction --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eExtra-Wide, Minimal Depth: Stack-Fab Built to Stay Inert at 4.5\"\u003c\/h3\u003e\n    \u003cp\u003eAt 44 inches wide and 4.5 inches deep, the M10D-S WAV is the widest, shallowest enclosure in the Micro Series. The extra-wide format is intentional, it spans the full width of most full-size truck cab floors, placing both drivers at opposite ends of the available space for maximum acoustic separation and even bass distribution across the cabin.\u003c\/p\u003e\n    \u003cp\u003eThe front baffle is a double-layer stack-fab build, two CNC-cut Langboard Elite MDF panels bonded to 1.5 inches total. At 4.5 inches of total depth, panel width is the primary geometric rigidity constraint. Stack-fab layering and dado joinery at every panel joint, with dowels reinforcing the assembly throughout, compensate for what shallow panel depth cannot provide alone. Both drivers mount flush to the baffle face, sealed with their gaskets against the double-layer front panel.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- IMPEDANCE BLOCK --\u003e\n  \u003cdiv class=\"ms-wiring\"\u003e\n    \u003ch3\u003eImpedance Wiring: Know Before You Order\u003c\/h3\u003e\n    \u003cdiv class=\"ms-wiring-row\"\u003e\n      \u003cdiv class=\"ms-wiring-load\"\u003e1Ω\u003c\/div\u003e\n      \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo thinPRO10-2 (Single 2Ω) wired in parallel.\u003c\/strong\u003e Maximum power extraction. Requires an amplifier explicitly rated for sustained 1Ω operation.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"ms-wiring-row\"\u003e\n      \u003cdiv class=\"ms-wiring-load\"\u003e2Ω\u003c\/div\u003e\n      \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo thinPRO10-4 (Single 4Ω) wired in parallel.\u003c\/strong\u003e Broadest amplifier compatibility. Recommended configuration for most builds.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"ms-wiring-row\"\u003e\n      \u003cdiv class=\"ms-wiring-load\"\u003e4Ω\u003c\/div\u003e\n      \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo thinPRO10-2 (Single 2Ω) wired in series.\u003c\/strong\u003e Safest electrical configuration. Requires a monoblock with strong 4Ω output to hit the power ceiling these drivers need.\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WHY CARDS --\u003e\n  \u003cdiv class=\"ms-card-grid\"\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n      \u003ch4\u003e0.40 cu ft Per Chamber: Displacement Accounted For\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eEach chamber holds \u003cstrong\u003e0.40 cu ft net\u003c\/strong\u003e. After driver displacement, each thinPRO 10 sees \u003cstrong\u003e0.35 cu ft of acoustic airspace\u003c\/strong\u003e: Wavtech's published sweet spot. This is not approximated from external dimensions. It is calculated net volume with displacement already subtracted.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eFormat\u003c\/span\u003e\n      \u003ch4\u003e44\" Wide: Full-Width Truck Cab Fitment\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eAt \u003cstrong\u003e44 inches wide\u003c\/strong\u003e, the M10D-S WAV spans the full floor width of most full-size crew cab and extended cab trucks. Both drivers sit at opposite ends of the available floor space, maximizing acoustic separation and even bass distribution across the cabin.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eBaffle\u003c\/span\u003e\n      \u003ch4\u003e1.5\" Double-Layer: Flush-Mounted Drivers\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eTwo bonded layers of \u003cstrong\u003eLangboard Elite 3\/4\" MDF\u003c\/strong\u003e at 1.5 inches total. Both thinPRO 10 drivers mount \u003cstrong\u003eflush to the baffle face\u003c\/strong\u003e, sealing against their gaskets against the double-layer front panel, no recessed pockets, no fitment gaps.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eChambers\u003c\/span\u003e\n      \u003ch4\u003eDual Chamber: Acoustically Isolated, CNC Divider\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eA CNC-cut, dado-jointed \u003cstrong\u003echamber divider\u003c\/strong\u003e separates the two driver volumes completely. Neither driver shares airspace with the other. Each thinPRO 10 loads into its own sealed 0.40 cu ft chamber independently, correct acoustic alignment on both sides, every time.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eWiring\u003c\/span\u003e\n      \u003ch4\u003eSingle Proline X Terminal Cup: Pre-Wired\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eOne \u003cstrong\u003eProline X ABS\/carbon fiber terminal cup\u003c\/strong\u003e with stainless hardware serves the entire enclosure. Pre-wired internally with \u003cstrong\u003e12-gauge OFC\u003c\/strong\u003e to both driver positions. Connect your single amplifier run to the terminal and both drivers are fed, clean, simple, no splicing required.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n      \u003ch4\u003e8\/32 Threaded Inserts: Both Baffles\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eBoth baffle positions are fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e. Stainless machine screws are included for both drivers. Each thinPRO 10 threads into steel, not MDF. Consistent clamping force, no stripping, clean reinstallation at any future service.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eConfiguration\u003c\/span\u003e\n      \u003ch4\u003eFront-Firing or Downfiring: Feet Included\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eRubber feet for \u003cstrong\u003edownfiring installation\u003c\/strong\u003e are included. The extra-wide format lays flat across a truck cab floor in downfire orientation, coupling both drivers' output to the full floor surface. This is the most effective install configuration for this enclosure in a full-size truck cab.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eReinforcement\u003c\/span\u003e\n      \u003ch4\u003eDowel-Reinforced Stack Fab Throughout\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eDowels throughout the stack-fab assembly add mechanical alignment and shear resistance at panel joints beyond what dado joinery and adhesive alone provide. At 1,500 watts RMS combined across two drivers in a 4.5-inch-deep enclosure, \u003cstrong\u003edado + adhesive + dowels\u003c\/strong\u003e, all three systems, is the correct structural standard.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- HIGHLIGHT --\u003e\n  \u003cdiv class=\"ms-highlight\"\u003e\n    \u003ch3\u003eReady to Mount. Ready to Wire. Ready to Downfire.\u003c\/h3\u003e\n    \u003cp\u003eThe M10D-S WAV ships fully prepped. The \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with 12-gauge OFC to both driver positions, one amplifier run, both drivers fed. Both baffles use \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless machine screws included. \u003cstrong\u003eRubber feet for downfiring\u003c\/strong\u003e are included. Polyfill is factory-installed in both chambers.\u003c\/p\u003e\n    \u003ch3\u003eSingle Voice Coil: Single Connection Per Driver\u003c\/h3\u003e\n    \u003cp\u003eThe thinPRO 10 is a \u003cstrong\u003esingle voice coil driver\u003c\/strong\u003e: no wiring configuration at the driver level. Select the 2Ω or 4Ω variant at purchase based on your target system impedance. Wire both drivers to the terminal cup in parallel or series to achieve your final amplifier load. See the impedance wiring chart above before selecting your variant.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FITMENT --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n    \u003cp\u003eThe M10D-S WAV's 44\" wide, 4.5\" deep format is purpose-built for full-width behind-seat and cargo floor installs. Measure the available width carefully. 44\" is a significant span:\u003c\/p\u003e\n    \u003cul class=\"ms-fitment\"\u003e\n      \u003cli\u003eBehind-seat floor: full-size crew cab trucks (full-width)\u003c\/li\u003e\n      \u003cli\u003eBehind-seat floor: extended cab trucks (full-width)\u003c\/li\u003e\n      \u003cli\u003eFlat cargo floor: full-size SUVs and vans\u003c\/li\u003e\n      \u003cli\u003eTrunk floor: full-size sedans with wide trunk openings\u003c\/li\u003e\n      \u003cli\u003eDownfire on cab floor, maximum floor coupling, both drivers\u003c\/li\u003e\n      \u003cli\u003eStealth under-seat builds: any vehicle with 44\"+ floor width at 4.5\" clearance\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WARRANTY --\u003e\n  \u003cdiv class=\"ms-warranty\"\u003e\n    \u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n    \u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures carry a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Built and inspected in our Tullahoma, Tennessee facility before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003chr class=\"ms-divider\"\u003e\n\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n    \u003cp\u003eEvery Proline X Micro Series enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee on ShopSabre CNC routers. Chamber volume, divider placement, cutout geometry, dado joint depth, baffle layer count, dowel placement, and terminal positioning are all held to spec on every unit. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e throughout: named, mill-documented, published density and bond specifications.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43188380270681,"sku":"M10D-S WAV","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-dual-10-sealed-enclosure-fits-wavtech-thinpro-10subwoofer-enclosuresproline-x-1688455.jpg?v=1775098521"},{"product_id":"proline-x-micro-series-dual-12-sealed-enclosure-fits-resonix-gus-12","title":"Proline X Micro Series Dual 12\" Sealed Enclosure | Built for ResoNix GUS-12","description":"\u003c!-- ============================================================\n PROLINE X MICRO SERIES — DUAL ResoNix GUS-12\n SEALED DUAL 12\" ENCLOSURE ONLY\n Color system: Green (#16a34a primary)\n SKU: M12D-S GUS\n ============================================================ --\u003e\n\n\u003cstyle\u003e\n .ms-wrap * { box-sizing: border-box; }\n .ms-wrap { font-family: inherit; color: #1e293b; line-height: 1.7; max-width: 1200px; margin: 0 auto; }\n .ms-hero { background: linear-gradient(135deg, #0f172a 0%, #14532d 100%); border-radius: 8px; padding: 40px 36px; margin-bottom: 32px; position: relative; overflow: hidden; }\n .ms-hero::before { content: ''; position: absolute; top: -40px; right: -40px; width: 220px; height: 220px; background: rgba(22,163,74,0.12); border-radius: 50%; }\n .ms-hero-badge { display: inline-block; background: transparent; border: 2px solid #16a34a; color: #86efac; font-size: 0.75em; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; padding: 4px 14px; border-radius: 20px; margin-bottom: 16px; }\n .ms-hero h2 { color: #ffffff; font-size: 1.65em; font-weight: 800; margin: 0 0 14px 0; line-height: 1.25; }\n .ms-hero p { color: #cbd5e1; font-size: 1em; margin: 0 0 24px 0; max-width: 660px; line-height: 1.7; }\n .ms-hero-stats { display: flex; gap: 28px; flex-wrap: wrap; }\n .ms-stat { text-align: center; }\n .ms-stat-num { display: block; color: #86efac; font-size: 1.5em; font-weight: 800; line-height: 1; }\n .ms-stat-label { display: block; color: #94a3b8; font-size: 0.72em; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; }\n .ms-section { background: #ffffff; border: 1px solid #e2e8f0; border-top: 4px solid #16a34a; border-radius: 6px; padding: 28px 32px; margin-bottom: 24px; }\n .ms-section:nth-child(odd) { background: #f8fafc; }\n .ms-section h3 { color: #14532d; font-size: 1.15em; font-weight: 700; margin: 0 0 14px 0; }\n .ms-section p { color: #334155; font-size: 0.97em; margin: 0 0 12px 0; }\n .ms-section p:last-child { margin-bottom: 0; }\n .ms-highlight { background: #f0fdf4; border-left: 5px solid #16a34a; padding: 22px 28px; margin: 28px 0; border-radius: 0 6px 6px 0; }\n .ms-highlight h3 { color: #14532d; margin: 0 0 10px 0; font-size: 1.1em; font-weight: 700; }\n .ms-highlight h3 + h3 { margin-top: 18px; }\n .ms-highlight p { margin-bottom: 10px; color: #1e293b; font-size: 0.97em; }\n .ms-highlight p:last-child { margin-bottom: 0; }\n .ms-alert { background: #dcfce7; border: 1px solid #16a34a; border-radius: 6px; padding: 14px 18px; margin: 20px 0; font-size: 0.93em; color: #166534; }\n .ms-alert strong { color: #14532d; }\n .ms-wiring { background: #0f172a; border-radius: 6px; padding: 24px 28px; margin: 24px 0; }\n .ms-wiring h3 { color: #86efac; font-size: 1em; font-weight: 700; margin: 0 0 16px 0; letter-spacing: 0.05em; text-transform: uppercase; }\n .ms-wiring-row { display: flex; align-items: center; gap: 14px; padding: 10px 0; border-bottom: 1px solid #1e293b; }\n .ms-wiring-row:last-child { border-bottom: none; padding-bottom: 0; }\n .ms-wiring-load { background: #16a34a; color: #ffffff; font-size: 1.1em; font-weight: 800; padding: 8px 16px; border-radius: 4px; min-width: 60px; text-align: center; }\n .ms-wiring-desc { color: #cbd5e1; font-size: 0.93em; line-height: 1.5; }\n .ms-wiring-desc strong { color: #ffffff; }\n .ms-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 24px 0; }\n @media (max-width: 600px) { .ms-card-grid { grid-template-columns: 1fr; } }\n .ms-card { background: #ffffff; border: 1px solid #e2e8f0; border-top: 3px solid #16a34a; border-radius: 6px; padding: 22px; }\n .ms-card-label { display: inline-block; background: #16a34a; color: #ffffff; font-size: 0.68em; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 3px 10px; border-radius: 3px; margin-bottom: 10px; }\n .ms-card h4 { color: #14532d; font-size: 1em; font-weight: 700; margin: 0 0 10px 0; }\n .ms-card-divider { height: 2px; background: #16a34a; width: 32px; margin-bottom: 12px; border-radius: 2px; }\n .ms-card p { font-size: 0.93em; color: #475569; margin: 0; line-height: 1.65; }\n .ms-card p strong { color: #14532d; }\n .ms-warranty { background: #0f172a; border-left: 5px solid #16a34a; border-radius: 0 6px 6px 0; padding: 20px 28px; margin: 28px 0; display: flex; align-items: center; gap: 20px; }\n .ms-warranty-badge { background: #16a34a; color: #ffffff; font-size: 1em; font-weight: 800; padding: 10px 16px; border-radius: 4px; white-space: nowrap; }\n .ms-warranty p { color: #cbd5e1; font-size: 0.93em; margin: 0; line-height: 1.6; }\n .ms-warranty strong { color: #ffffff; }\n .ms-fitment { list-style: none; margin: 14px 0 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }\n @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n .ms-fitment li { font-size: 0.93em; color: #334155; padding: 8px 12px; background: #f0fdf4; border-left: 3px solid #16a34a; border-radius: 0 4px 4px 0; }\n .ms-divider { border: none; border-top: 1px solid #e2e8f0; margin: 32px 0; }\n .ms-langboard { font-weight: 700; color: #14532d; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ms-wrap\"\u003e\n\n \u003c!-- HERO --\u003e\n \u003cdiv class=\"ms-hero\"\u003e\n \u003cspan class=\"ms-hero-badge\"\u003eMicro Series | Dual GUS-12 | Enclosure Only\u003c\/span\u003e\n \u003ch2\u003eDual GUS-12. 1.60 cu ft Total.\u003cbr\u003e0.75 cu ft Acoustic Per Driver: ResoNix's Optimum.\u003c\/h2\u003e\n \u003cp\u003eTwo ResoNix GUS-12 drivers. Two acoustically isolated sealed chambers. Each chamber delivers 0.80 cubic feet gross, which after the GUS-12's 0.047 cubic foot driver displacement equals exactly 0.75 cubic feet of net acoustic airspace per driver. ResoNix's published 0.707 Qtc target. In 7.5 inches of total depth. 1,600 watts RMS combined. The most technically demanding dual-driver build in the Micro Series.\u003c\/p\u003e\n \u003cdiv class=\"ms-hero-stats\"\u003e\n \u003cdiv class=\"ms-stat\"\u003e\n \u003cspan class=\"ms-stat-num\"\u003e1.60\u003c\/span\u003e\n \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net Total\u003c\/span\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"ms-stat\"\u003e\n \u003cspan class=\"ms-stat-num\"\u003e0.75\u003c\/span\u003e\n \u003cspan class=\"ms-stat-label\"\u003eCu Ft Acoustic Per Driver\u003c\/span\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"ms-stat\"\u003e\n \u003cspan class=\"ms-stat-num\"\u003e7.5\"\u003c\/span\u003e\n \u003cspan class=\"ms-stat-label\"\u003eTotal Depth\u003c\/span\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"ms-stat\"\u003e\n \u003cspan class=\"ms-stat-num\"\u003e1,600W\u003c\/span\u003e\n \u003cspan class=\"ms-stat-label\"\u003eCombined RMS Rating\u003c\/span\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n \u003cdiv class=\"ms-alert\"\u003e\n \u003cstrong\u003eEnclosure only.\u003c\/strong\u003e ResoNix GUS-12 subwoofers are not included and must be purchased separately from ResoNix Sound Solutions. Both the D2 and D4 variants fit this enclosure. Select the impedance variant that matches your amplifier's stable load before ordering.\n \u003c\/div\u003e\n\n \u003c!-- SECTION 1: Volume Math --\u003e\n \u003cdiv class=\"ms-section\"\u003e\n \u003ch3\u003e0.80 cu ft Per Chamber: 0.75 cu ft Acoustic After Displacement\u003c\/h3\u003e\n \u003cp\u003eResoNix recommends 0.75 cubic feet of net acoustic airspace per GUS-12 for 0.707 Qtc. The GUS-12 has a published driver displacement of 0.047 cubic feet. Building each chamber to a gross volume of 0.75 cubic feet and then installing the driver would leave only 0.703 cubic feet of acoustic airspace. Below the recommendation. The correct gross build volume is 0.75 + 0.047 = 0.797 cubic feet per chamber.\u003c\/p\u003e\n \u003cp\u003eEach chamber in the M12D-S GUS is built to deliver \u003cstrong\u003e0.80 cubic feet gross\u003c\/strong\u003e: after the GUS-12 is installed, each driver sees \u003cstrong\u003e0.75 cubic feet of net acoustic airspace\u003c\/strong\u003e, exactly matching ResoNix's published optimum. Total net acoustic volume across both chambers is 1.50 cubic feet. Total gross enclosure volume is 1.60 cubic feet. The listed 1.60 cu ft is the gross figure: the acoustic figure that matters for each driver is 0.75 cu ft per chamber.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- SECTION 2: Why Dual GUS-12 --\u003e\n \u003cdiv class=\"ms-section\"\u003e\n \u003ch3\u003eTwo GUS-12 Drivers: More Output, Same Alignment Character\u003c\/h3\u003e\n \u003cp\u003eThe GUS-12's Qts of 0.28 and Fs of 14.54 Hz define both its performance ceiling and its operating requirements. A single GUS-12 in the correct enclosure produces flat anechoic response extending well below 20 Hz, but at 800 watts RMS and a single 12\" cone, output in large vehicle cabins or competitive environments has a ceiling. Two GUS-12 drivers in isolated 0.75 cubic foot chambers double the cone displacement and the combined power handling to 1,600 watts RMS, while each driver still operates in exactly the enclosure volume it requires.\u003c\/p\u003e\n \u003cp\u003eThe acoustic character from the single GUS-12 build carries forward here. Both drivers have Qts of 0.28, and the system Qtc in each chamber targets 0.707: flat anechoic response with the deep low-frequency extension the driver's motor and suspension are engineered to deliver. Two drivers make that response roughly 3 dB louder at all bass frequencies. They do not change its character. The dual GUS-12 delivers more output than any other shallow 12\" build in this depth class.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- SECTION 3: Construction --\u003e\n \u003cdiv class=\"ms-section\"\u003e\n \u003ch3\u003e1,600W Combined: Construction Built to Match\u003c\/h3\u003e\n \u003cp\u003eThe front baffle is a double-layer stack-fab build, two CNC-cut Langboard Elite MDF panels bonded to 1.5 inches total. The stack-fab assembly is reinforced with dowels throughout, adding mechanical alignment and shear resistance at every panel joint beyond what layer adhesion alone provides. At 1,600 watts RMS combined across two GUS-12 drivers, this is the correct structural standard, not overbuilt relative to the application.\u003c\/p\u003e\n \u003cp\u003eThe chamber divider is CNC-cut to full wall thickness and stacked to the same standard as the exterior panels. It is a structural element with the same rigidity and acoustic seal quality as any wall in the enclosure. Each chamber is independently sealed. Neither driver's acoustic loading affects the other.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- IMPEDANCE BLOCK --\u003e\n \u003cdiv class=\"ms-wiring\"\u003e\n \u003ch3\u003eImpedance Wiring: Know Before You Order\u003c\/h3\u003e\n \u003cdiv class=\"ms-wiring-row\"\u003e\n \u003cdiv class=\"ms-wiring-load\"\u003e1Ω\u003c\/div\u003e\n \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo GUS-12 D2 (Dual 2Ω) each wired parallel Single 1Ω, then both in parallel 0.5Ω.\u003c\/strong\u003e Not recommended. Most amplifiers cannot operate at this load. Wire D2 coils in series for 4Ω per driver, then parallel for 2Ω final instead.\u003c\/div\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"ms-wiring-row\"\u003e\n \u003cdiv class=\"ms-wiring-load\"\u003e2Ω\u003c\/div\u003e\n \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo GUS-12 D4 (Dual 4Ω) each wired parallel 2Ω per driver, then both in parallel 1Ω. OR two GUS-12 D2 each wired series 4Ω per driver, then both in parallel 2Ω.\u003c\/strong\u003e The D2 series\/parallel at 2Ω is the recommended configuration for most builds.\u003c\/div\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"ms-wiring-row\"\u003e\n \u003cdiv class=\"ms-wiring-load\"\u003e4Ω\u003c\/div\u003e\n \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo GUS-12 D4 (Dual 4Ω) each wired parallel 2Ω per driver, then both in series 4Ω final.\u003c\/strong\u003e Safest electrical configuration. Broadest amplifier compatibility. Requires strong 4Ω monoblock output to hit the power ceiling these drivers need.\u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- WHY CARDS --\u003e\n \u003cdiv class=\"ms-card-grid\"\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n \u003ch4\u003e0.75 cu ft Acoustic Per Driver: ResoNix's 0.707 Qtc Target\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eEach chamber is built to \u003cstrong\u003e0.80 cu ft gross\u003c\/strong\u003e. After the GUS-12's 0.047 cu ft displacement, each driver sees \u003cstrong\u003e0.75 cu ft of net acoustic airspace\u003c\/strong\u003e: exactly what ResoNix publishes for 0.707 Qtc. Both chambers are identical. Both drivers load correctly.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eOutput\u003c\/span\u003e\n \u003ch4\u003e1,600W RMS Combined: Dual Klippel-Verified Xmax\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eTwo GUS-12 drivers at \u003cstrong\u003e800W RMS each\u003c\/strong\u003e with \u003cstrong\u003e20.69mm Klippel-verified Xmax\u003c\/strong\u003e per driver. Combined cone displacement doubles the output potential of the single GUS-12 build across the entire bass frequency range. Particularly below 30 Hz where cone displacement is the dominant output variable.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eChambers\u003c\/span\u003e\n \u003ch4\u003eDual Chamber, CNC Divider, Stack-Fabbed to Full Wall Thickness, Independently Sealed\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eA CNC-cut, stack-fabbed \u003cstrong\u003echamber divider\u003c\/strong\u003e separates both driver volumes completely. Neither GUS-12 shares airspace with the other. Each driver loads into its own sealed 0.80 cu ft chamber, correct acoustic alignment on both sides, independently maintained.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eBaffle\u003c\/span\u003e\n \u003ch4\u003e1.5\" Double-Layer: Dowel Reinforced Stack Fab\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eTwo bonded layers of \u003cstrong\u003eLangboard Elite 3\/4\" MDF\u003c\/strong\u003e at 1.5 inches total. Dowels reinforce the stack-fab assembly throughout. At 1,600 watts RMS combined, baffle resonance and panel flex are structural failure modes. This construction eliminates both.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n \u003ch4\u003e8\/32 Threaded Inserts: Machine Screws for Both Drivers\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eBoth baffle positions are fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e. Stainless machine screws are included for both GUS-12 drivers. Each driver mounts to steel, consistent clamping force, no stripping, clean reinstallation at any service interval.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eWiring\u003c\/span\u003e\n \u003ch4\u003eSingle Proline X Terminal Cup: Pre-Wired to Both Drivers\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eOne \u003cstrong\u003eProline X ABS\/carbon fiber terminal cup\u003c\/strong\u003e with stainless hardware and copper ring terminals serves the entire enclosure. Pre-wired internally with \u003cstrong\u003e12-gauge OFC\u003c\/strong\u003e to both driver positions. One amplifier run. Both drivers fed.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eAlignment\u003c\/span\u003e\n \u003ch4\u003eSame 0.707 Qtc Character as the Single GUS-12\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eBoth GUS-12 drivers have \u003cstrong\u003eQts of 0.28, Fs of 14.54 Hz\u003c\/strong\u003e. The system Qtc in each chamber targets 0.707: flat anechoic response with deep extension. The dual build produces roughly \u003cstrong\u003e3 dB more low-frequency output\u003c\/strong\u003e than a single GUS-12 at equivalent power.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eReinforcement\u003c\/span\u003e\n \u003ch4\u003eDowel-Reinforced Stack Fab, 1,600W Structural Standard\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eDowels throughout the stack-fab assembly add mechanical alignment and shear resistance at panel joints independent of adhesive condition. Combined with \u003cstrong\u003estack-fab construction and adhesive\u003c\/strong\u003e: three independent mechanical systems locking every joint against the sustained load of 1,600 watts RMS across two GUS-12 drivers.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\n \u003c!-- HIGHLIGHT --\u003e\n \u003cdiv class=\"ms-highlight\"\u003e\n \u003ch3\u003eReady to Mount. Ready to Wire. Built for Active Systems.\u003c\/h3\u003e\n \u003cp\u003eThe M12D-S GUS ships fully prepped. The \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with 12-gauge OFC to both driver positions. Connect your amplifier run and wiring is complete. Both baffles use \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless machine screws included. Polyfill is factory-installed in both chambers independently. Rubber feet for downfiring are included.\u003c\/p\u003e\n \u003ch3\u003ePlan Your Wiring Before Selecting the Voice Coil Variant\u003c\/h3\u003e\n \u003cp\u003eThe GUS-12 is available in \u003cstrong\u003eDual 2Ω (D2)\u003c\/strong\u003e and \u003cstrong\u003eDual 4Ω (D4)\u003c\/strong\u003e configurations. With two drivers, the wiring combinations produce multiple final impedance options. The most practical configuration for most builds is \u003cstrong\u003etwo D2 drivers, each wired series (4Ω per driver), then both in parallel (2Ω final)\u003c\/strong\u003e. Broadest amplifier compatibility at a manageable load. See the impedance chart above and confirm your amplifier's stable impedance before ordering the driver variant.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- FITMENT --\u003e\n \u003cdiv class=\"ms-section\"\u003e\n \u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n \u003cp\u003eAt 40\" × 14.75\" × 7.5\", this enclosure is designed for applications where a single GUS-12 is not enough output and a conventional dual 12\" sealed build is too deep. Measure carefully. 40\" wide at 7.5\" deep covers most full-size sedan trunks and SUV cargo floors:\u003c\/p\u003e\n \u003cul class=\"ms-fitment\"\u003e\n \u003cli\u003eTrunk floor: full-size sedans and sport sedans\u003c\/li\u003e\n \u003cli\u003eCargo floor: mid-size and full-size SUVs\u003c\/li\u003e\n \u003cli\u003eBehind-seat: full-size crew cab trucks\u003c\/li\u003e\n \u003cli\u003eUnder rear bench: full-size vans and SUVs\u003c\/li\u003e\n \u003cli\u003eSQ competition builds: maximum GUS-12 output at minimal depth\u003c\/li\u003e\n \u003cli\u003eHigh-output systems: where distortion performance matters as much as SPL\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n\n \u003c!-- WARRANTY --\u003e\n \u003cdiv class=\"ms-warranty\"\u003e\n \u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n \u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures carry a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Built and inspected in our Tullahoma, Tennessee facility before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003chr class=\"ms-divider\"\u003e\n\n \u003cdiv class=\"ms-section\"\u003e\n \u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n \u003cp\u003eEvery Proline X Micro Series enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee on ShopSabre CNC routers. Chamber volume, divider placement, cutout geometry, baffle layer count, dowel placement, and terminal positioning are all held to spec on every unit. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e throughout: named, mill-documented, published density and bond specifications.\u003c\/p\u003e\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43194974306393,"sku":"M12D-S Gus","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-dual-12-sealed-enclosure-fits-resonix-gus-12subwoofer-enclosuresproline-x-2636869.jpg?v=1775710569"},{"product_id":"proline-x-micro-series-10-sealed-enclosure-fits-resonix-gus-10","title":"Proline X Micro Series 10\" Sealed Enclosure | Built for ResoNix GUS-10","description":"\u003c!-- ============================================================\n PROLINE X MICRO SERIES — ResoNix GUS-10\n SEALED 10\" ENCLOSURE ONLY\n Color system: Green (#16a34a primary)\n ============================================================ --\u003e\n\u003cstyle\u003e\n .ms-wrap * { box-sizing: border-box; }\n .ms-wrap { font-family: inherit; color: #1e293b; line-height: 1.7; max-width: 1200px; margin: 0 auto; }\n .ms-hero { background: linear-gradient(135deg, #0f172a 0%, #14532d 100%); border-radius: 8px; padding: 40px 36px; margin-bottom: 32px; position: relative; overflow: hidden; }\n .ms-hero::before { content: ''; position: absolute; top: -40px; right: -40px; width: 220px; height: 220px; background: rgba(22,163,74,0.12); border-radius: 50%; }\n .ms-hero-badge { display: inline-block; background: transparent; border: 2px solid #16a34a; color: #86efac; font-size: 0.75em; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; padding: 4px 14px; border-radius: 20px; margin-bottom: 16px; }\n .ms-hero h2 { color: #ffffff; font-size: 1.65em; font-weight: 800; margin: 0 0 14px 0; line-height: 1.25; }\n .ms-hero p { color: #cbd5e1; font-size: 1em; margin: 0 0 24px 0; max-width: 640px; line-height: 1.7; }\n .ms-hero-stats { display: flex; gap: 28px; flex-wrap: wrap; }\n .ms-stat { text-align: center; }\n .ms-stat-num { display: block; color: #86efac; font-size: 1.5em; font-weight: 800; line-height: 1; }\n .ms-stat-label { display: block; color: #94a3b8; font-size: 0.72em; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; }\n .ms-section { background: #ffffff; border: 1px solid #e2e8f0; border-top: 4px solid #16a34a; border-radius: 6px; padding: 28px 32px; margin-bottom: 24px; }\n .ms-section:nth-child(odd) { background: #f8fafc; }\n .ms-section h3 { color: #14532d; font-size: 1.15em; font-weight: 700; margin: 0 0 14px 0; }\n .ms-section p { color: #334155; font-size: 0.97em; margin: 0 0 12px 0; }\n .ms-section p:last-child { margin-bottom: 0; }\n .ms-highlight { background: #f0fdf4; border-left: 5px solid #16a34a; padding: 22px 28px; margin: 28px 0; border-radius: 0 6px 6px 0; }\n .ms-highlight h3 { color: #14532d; margin: 0 0 10px 0; font-size: 1.1em; font-weight: 700; }\n .ms-highlight h3 + h3 { margin-top: 18px; }\n .ms-highlight p { margin-bottom: 10px; color: #1e293b; font-size: 0.97em; }\n .ms-highlight p:last-child { margin-bottom: 0; }\n .ms-alert { background: #dcfce7; border: 1px solid #16a34a; border-radius: 6px; padding: 14px 18px; margin: 20px 0; font-size: 0.93em; color: #166534; }\n .ms-alert strong { color: #14532d; }\n .ms-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 24px 0; }\n @media (max-width: 600px) { .ms-card-grid { grid-template-columns: 1fr; } }\n .ms-card { background: #ffffff; border: 1px solid #e2e8f0; border-top: 3px solid #16a34a; border-radius: 6px; padding: 22px; }\n .ms-card-label { display: inline-block; background: #16a34a; color: #ffffff; font-size: 0.68em; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 3px 10px; border-radius: 3px; margin-bottom: 10px; }\n .ms-card h4 { color: #14532d; font-size: 1em; font-weight: 700; margin: 0 0 10px 0; }\n .ms-card-divider { height: 2px; background: #16a34a; width: 32px; margin-bottom: 12px; border-radius: 2px; }\n .ms-card p { font-size: 0.93em; color: #475569; margin: 0; line-height: 1.65; }\n .ms-card p strong { color: #14532d; }\n .ms-warranty { background: #0f172a; border-left: 5px solid #16a34a; border-radius: 0 6px 6px 0; padding: 20px 28px; margin: 28px 0; display: flex; align-items: center; gap: 20px; }\n .ms-warranty-badge { background: #16a34a; color: #ffffff; font-size: 1em; font-weight: 800; padding: 10px 16px; border-radius: 4px; white-space: nowrap; }\n .ms-warranty p { color: #cbd5e1; font-size: 0.93em; margin: 0; line-height: 1.6; }\n .ms-warranty strong { color: #ffffff; }\n .ms-fitment { list-style: none; margin: 14px 0 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }\n @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n .ms-fitment li { font-size: 0.93em; color: #334155; padding: 8px 12px; background: #f0fdf4; border-left: 3px solid #16a34a; border-radius: 0 4px 4px 0; }\n .ms-divider { border: none; border-top: 1px solid #e2e8f0; margin: 32px 0; }\n .ms-langboard { font-weight: 700; color: #14532d; }\n\u003c\/style\u003e\n\u003cdiv class=\"ms-wrap\"\u003e\n\u003c!-- HERO --\u003e\n\u003cdiv class=\"ms-hero\"\u003e\n\u003cspan class=\"ms-hero-badge\"\u003eMicro Series | GUS-10 | Enclosure Only\u003c\/span\u003e\n\u003ch2\u003eBuilt for the ResoNix GUS-10.\u003cbr\u003eKlippel-Verified Performance in 6 Inches of Depth.\u003c\/h2\u003e\n\u003cp\u003eThe ResoNix GUS-10 has a measured Fs of 16.91 Hz, a Qts of 0.35, and Klippel-verified Xmax of 18.37mm at BL 70%, the same engineering platform as the GUS-12 and GUS-15, scaled to a 10\" format. The Proline X Micro Series enclosure delivers 0.63 cubic feet of sealed airspace in a double-layer stack-fab build at 6 inches of total depth. Near ResoNix's 0.60 cubic foot optimum in the most compact shell in the GUS Micro Series lineup.\u003c\/p\u003e\n\u003cdiv class=\"ms-hero-stats\"\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e0.63\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net Volume\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e6\"\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eTotal Depth\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e16.91\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eDriver Fs (Hz)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-stat\"\u003e\n\u003cspan class=\"ms-stat-num\"\u003e500W\u003c\/span\u003e \u003cspan class=\"ms-stat-label\"\u003eDriver RMS Rating\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n\u003cdiv class=\"ms-alert\"\u003e\n\u003cstrong\u003eEnclosure only.\u003c\/strong\u003e The ResoNix GUS-10 subwoofer is not included and must be purchased separately from ResoNix Sound Solutions. This enclosure accepts both the D2 and D4 variants, the cutout and mounting geometry are identical between impedance options.\u003c\/div\u003e\n\u003c!-- SECTION 1: Volume --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003e0.63 cu ft: Near ResoNix's 0.60 Optimum\u003c\/h3\u003e\n\u003cp\u003eResoNix publishes a 0.707 Qtc target of 0.60 cubic feet for the GUS-10, with a driver displacement of 0.031 cubic feet. The correct gross build volume to deliver exactly 0.60 cubic feet of net acoustic airspace after the driver is installed is 0.60 + 0.031 = 0.631 cubic feet. This enclosure delivers 0.63 cubic feet net, hitting ResoNix's 0.60 acoustic target, which places the system Qtc fractionally above 0.707 and shifts the anechoic -3dB point marginally upward.\u003c\/p\u003e\n\u003cp\u003eIn a real vehicle cabin, where bass frequencies below 80 Hz receive significant gain from acoustic boundaries, the difference between 0.60 and 0.63 cubic feet net is not audible. The GUS-10 in this enclosure performs within the band of ResoNix's published optimum range, delivering the flat 0.707 Qtc alignment the driver was designed for.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 2: Driver --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003eThe GUS-10: Same Platform as the GUS-12 and GUS-15, in a 10\" Format\u003c\/h3\u003e\n\u003cp\u003eThe GUS-10 shares the core engineering of the GUS-12 and GUS-15: FEA-optimized overhung motor, patent-pending copper shorting sleeve, copper shorting rings, titanium voice coil former, Nomex\/carbon fiber cone, and vented rear cone assembly. Every major parameter is Klippel-verified. The BL(x), CMS(x), Le(x), and QTS(x) data is published.\u003c\/p\u003e\n\u003cp\u003eThe GUS-10 is the entry point into the GUS series: 500 watts RMS, 18.37mm one-way Xmax at BL 70%, Fs of 16.91 Hz, and Qts of 0.35. Like the GUS-12, its low Qts produces a flat 0.707 Qtc sealed alignment with deep low-frequency extension and low distortion. The GUS-10 is the front subwoofer platform on the enthusiast market right now. Its 4.12\" mounting depth and compact sealed enclosure footprint put it in locations where nothing else with its distortion performance and extension capability can go.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SECTION 3: Construction --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003e1.5\" Double-Layer Baffle, Stack Fab, Dowel Reinforced\u003c\/h3\u003e\n\u003cp\u003eThe front baffle is a double-layer stack-fab build, two CNC-cut Langboard Elite MDF panels bonded to 1.5 inches total. The stack-fab assembly is further reinforced with dowels throughout, adding mechanical alignment and shear resistance at every panel joint beyond what layer adhesion alone provides. At 500 watts RMS on a 10\" driver with 18.37mm of one-way Xmax, the structural demands on the baffle are real. Double-layer construction eliminates panel resonance at the source rather than allowing it to color the bass output.\u003c\/p\u003e\n\u003cp\u003eEvery panel joint is precision CNC-cut and stack-fabbed. The 6-inch total depth gives side walls adequate geometric rigidity for the load, and Langboard Elite MDF at 200 psi internal bond and 410,000 psi MOE holds the structure over the life of the installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- WHY CARDS --\u003e\n\u003cdiv class=\"ms-card-grid\"\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n\u003ch4\u003e0.63 cu ft: Near ResoNix's 0.60 Optimum\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eResoNix's 0.707 Qtc target is \u003cstrong\u003e0.60 cu ft net acoustic\u003c\/strong\u003e. This enclosure is built to \u003cstrong\u003e0.63 cu ft gross\u003c\/strong\u003e. After the GUS-10's 0.031 cu ft displacement, the driver sees 0.599 cu ft of net acoustic airspace, effectively hitting ResoNix's optimum precisely.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eDriver\u003c\/span\u003e\n\u003ch4\u003eKlippel-Verified 18.37mm Xmax: Published LSI Data\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe GUS-10's \u003cstrong\u003e18.37mm Xmax at BL 70%\u003c\/strong\u003e is a Klippel large-signal measurement. BL symmetry, CMS linearity, and Le stability across stroke are all published by ResoNix, the same transparency standard applied to every driver they independently test.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eBaffle\u003c\/span\u003e\n\u003ch4\u003e1.5\" Double-Layer: Dowel Reinforced Stack Fab\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eTwo bonded layers of \u003cstrong\u003eLangboard Elite 3\/4\" MDF\u003c\/strong\u003e at 1.5 inches total, reinforced with \u003cstrong\u003edowels throughout the stack-fab assembly\u003c\/strong\u003e. Baffle panel resonance adds acoustic coloration. Double-layer construction at 1.5 inches eliminates it structurally.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n\u003ch4\u003e8\/32 Threaded Inserts: Machine Screws Included\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe baffle is fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e on the back face. Stainless machine screws are included. The GUS-10 mounts to steel, consistent clamping force, no stripping, clean reinstallation at any service interval.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eWiring\u003c\/span\u003e\n\u003ch4\u003eProline X Terminal Cup: Pre-Wired with 12g OFC\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003eProline X ABS\/carbon fiber terminal cup\u003c\/strong\u003e with stainless hardware and copper ring terminals is installed and pre-wired with \u003cstrong\u003e12-gauge OFC\u003c\/strong\u003e to the driver position. Connect your amplifier run and wiring is complete.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eCutout\u003c\/span\u003e\n\u003ch4\u003eDirect-Fit: Machined for the GUS-10\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe baffle cutout is machined to the \u003cstrong\u003eGUS-10's mounting diameter\u003c\/strong\u003e. The driver seats flush, seals against the included rubber mounting ring gasket, and mounts to the threaded inserts without shimming or modification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eAlignment\u003c\/span\u003e\n\u003ch4\u003e0.707 Qtc: Flat Response, Deep Extension\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eThe GUS-10's \u003cstrong\u003eQts of 0.35 and Fs of 16.91 Hz\u003c\/strong\u003e in this 0.63 cu ft enclosure produce a \u003cstrong\u003e0.707 Qtc sealed alignment\u003c\/strong\u003e: flat anechoic response with deep low-frequency extension below 20 Hz. Cabin gain in the vehicle reinforces the driver's deep extension in the listening position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eConfiguration\u003c\/span\u003e\n\u003ch4\u003eFront-Firing or Downfiring: Feet Included\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eRubber feet for \u003cstrong\u003edownfiring installation\u003c\/strong\u003e are included. The GUS-10's vented rear cone assembly allows the pole vent to be fully obstructed. Downfire in a tight enclosure is viable with no acoustic penalty. ResoNix notes minimal real-world difference between orientations; choose based on install practicality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eClearance\u003c\/span\u003e\n\u003ch4\u003e23mm Minimum Front Clearance\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eResoNix specifies a minimum of \u003cstrong\u003e23mm of clearance\u003c\/strong\u003e between the top of the GUS-10's surround and whatever is in front of the driver. Confirm this against your seat, cargo cover, or any surface positioned in front of the driver before mounting. Surround contact at full excursion causes mechanical damage not covered under warranty.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ms-card\"\u003e\n\u003cspan class=\"ms-card-label\"\u003eReinforcement\u003c\/span\u003e\n\u003ch4\u003eDowel-Reinforced Stack Fab: Three Systems at Every Joint\u003c\/h4\u003e\n\u003cdiv class=\"ms-card-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eDowels throughout the stack-fab assembly add mechanical alignment and shear resistance at panel joints independent of adhesive condition. \u003cstrong\u003estack-fab construction + adhesive + dowels\u003c\/strong\u003e: all three mechanical systems locking every joint against sustained load over the life of the installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- HIGHLIGHT --\u003e\n\u003cdiv class=\"ms-highlight\"\u003e\n\u003ch3\u003eReady to Mount. Ready to Wire. Ready to Perform.\u003c\/h3\u003e\n\u003cp\u003eThe enclosure ships fully prepped. The \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with 12-gauge OFC. Connect your amplifier run and wiring is complete. The double-layer baffle uses \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless machine screws included. \u003cstrong\u003eRubber feet for downfiring\u003c\/strong\u003e are included. Polyfill is factory-installed.\u003c\/p\u003e\n\u003ch3\u003eImpedance Options: D2 and D4\u003c\/h3\u003e\n\u003cp\u003eThe GUS-10 is available as a \u003cstrong\u003eDual 2-ohm (D2)\u003c\/strong\u003e and \u003cstrong\u003eDual 4-ohm (D4)\u003c\/strong\u003e. D2 T\/S parameters are not yet finalized by ResoNix. D4 data is published. Wire the D4 parallel for 2 ohms or series for 8 ohms. Wire the D2 parallel for 1 ohm or series for 4 ohms. The D4 wired parallel at 2 ohms into a 2-ohm-stable monoblock delivering 400–500 watts RMS is the practical target for most builds. Confirm your amplifier's stable impedance before selecting the voice coil configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- FITMENT --\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n\u003cp\u003eAt 26\" × 14\" × 6\", this is the most compact GUS enclosure in the Micro Series. The 4.12\" driver mounting depth and 6\" total enclosure depth open install locations that the GUS-12 cannot reach:\u003c\/p\u003e\n\u003cul class=\"ms-fitment\"\u003e\n\u003cli\u003eUnder-seat: compact cars, sport sedans, crossovers\u003c\/li\u003e\n\u003cli\u003ePassenger footwell: front sub applications\u003c\/li\u003e\n\u003cli\u003eBehind-seat: compact and mid-size truck cabs\u003c\/li\u003e\n\u003cli\u003eTrunk corner: compact cars and coupes\u003c\/li\u003e\n\u003cli\u003eSide cargo panel: SUVs and crossovers\u003c\/li\u003e\n\u003cli\u003eFront subwoofer builds: SQ and competition systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- WARRANTY --\u003e\n\u003cdiv class=\"ms-warranty\"\u003e\n\u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures carry a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Built and inspected in our Tullahoma, Tennessee facility before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr class=\"ms-divider\"\u003e\n\u003cdiv class=\"ms-section\"\u003e\n\u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n\u003cp\u003eEvery Proline X Micro Series enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee on ShopSabre CNC routers. Internal volume, cutout geometry, baffle layer count, dowel placement, and terminal positioning are all held to spec on every unit. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e throughout: named, mill-documented, published density and bond specifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43219660537945,"sku":"M10-S Gus","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-10-sealed-enclosure-fits-resonix-gus-10subwoofer-enclosuresproline-x-6299794.webp?v=1779355148"},{"product_id":"proline-x-micro-series-dual-10-sealed-enclosure-fits-resonix-gus-10","title":"Proline X Micro Series Dual 10\" Sealed Enclosure | Built for ResoNix GUS-10","description":"\u003c!-- ============================================================\n PROLINE X MICRO SERIES — DUAL ResoNix GUS-10\n SEALED DUAL 10\" ENCLOSURE ONLY\n Color system: Green (#16a34a primary)\n SKU: M10D-S GUS\n External: 34\" x 14.75\" x 8.25\"\n Net Volume: 1.26 cu ft total \/ 0.63 per chamber\n Net acoustic per driver: 0.63 - 0.031 displacement = 0.599 ≈ 0.60 cu ft\n ============================================================ --\u003e\n\n\u003cstyle\u003e\n .ms-wrap * { box-sizing: border-box; }\n .ms-wrap { font-family: inherit; color: #1e293b; line-height: 1.7; max-width: 1200px; margin: 0 auto; }\n .ms-hero { background: linear-gradient(135deg, #0f172a 0%, #14532d 100%); border-radius: 8px; padding: 40px 36px; margin-bottom: 32px; position: relative; overflow: hidden; }\n .ms-hero::before { content: ''; position: absolute; top: -40px; right: -40px; width: 220px; height: 220px; background: rgba(22,163,74,0.12); border-radius: 50%; }\n .ms-hero-badge { display: inline-block; background: transparent; border: 2px solid #16a34a; color: #86efac; font-size: 0.75em; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; padding: 4px 14px; border-radius: 20px; margin-bottom: 16px; }\n .ms-hero h2 { color: #ffffff; font-size: 1.65em; font-weight: 800; margin: 0 0 14px 0; line-height: 1.25; }\n .ms-hero p { color: #cbd5e1; font-size: 1em; margin: 0 0 24px 0; max-width: 660px; line-height: 1.7; }\n .ms-hero-stats { display: flex; gap: 28px; flex-wrap: wrap; }\n .ms-stat { text-align: center; }\n .ms-stat-num { display: block; color: #86efac; font-size: 1.5em; font-weight: 800; line-height: 1; }\n .ms-stat-label { display: block; color: #94a3b8; font-size: 0.72em; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; }\n .ms-section { background: #ffffff; border: 1px solid #e2e8f0; border-top: 4px solid #16a34a; border-radius: 6px; padding: 28px 32px; margin-bottom: 24px; }\n .ms-section:nth-child(odd) { background: #f8fafc; }\n .ms-section h3 { color: #14532d; font-size: 1.15em; font-weight: 700; margin: 0 0 14px 0; }\n .ms-section p { color: #334155; font-size: 0.97em; margin: 0 0 12px 0; }\n .ms-section p:last-child { margin-bottom: 0; }\n .ms-highlight { background: #f0fdf4; border-left: 5px solid #16a34a; padding: 22px 28px; margin: 28px 0; border-radius: 0 6px 6px 0; }\n .ms-highlight h3 { color: #14532d; margin: 0 0 10px 0; font-size: 1.1em; font-weight: 700; }\n .ms-highlight h3 + h3 { margin-top: 18px; }\n .ms-highlight p { margin-bottom: 10px; color: #1e293b; font-size: 0.97em; }\n .ms-highlight p:last-child { margin-bottom: 0; }\n .ms-alert { background: #dcfce7; border: 1px solid #16a34a; border-radius: 6px; padding: 14px 18px; margin: 20px 0; font-size: 0.93em; color: #166534; }\n .ms-alert strong { color: #14532d; }\n .ms-wiring { background: #0f172a; border-radius: 6px; padding: 24px 28px; margin: 24px 0; }\n .ms-wiring h3 { color: #86efac; font-size: 1em; font-weight: 700; margin: 0 0 16px 0; letter-spacing: 0.05em; text-transform: uppercase; }\n .ms-wiring-row { display: flex; align-items: center; gap: 14px; padding: 10px 0; border-bottom: 1px solid #1e293b; }\n .ms-wiring-row:last-child { border-bottom: none; padding-bottom: 0; }\n .ms-wiring-load { background: #16a34a; color: #ffffff; font-size: 1.1em; font-weight: 800; padding: 8px 16px; border-radius: 4px; min-width: 60px; text-align: center; }\n .ms-wiring-desc { color: #cbd5e1; font-size: 0.93em; line-height: 1.5; }\n .ms-wiring-desc strong { color: #ffffff; }\n .ms-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 24px 0; }\n @media (max-width: 600px) { .ms-card-grid { grid-template-columns: 1fr; } }\n .ms-card { background: #ffffff; border: 1px solid #e2e8f0; border-top: 3px solid #16a34a; border-radius: 6px; padding: 22px; }\n .ms-card-label { display: inline-block; background: #16a34a; color: #ffffff; font-size: 0.68em; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 3px 10px; border-radius: 3px; margin-bottom: 10px; }\n .ms-card h4 { color: #14532d; font-size: 1em; font-weight: 700; margin: 0 0 10px 0; }\n .ms-card-divider { height: 2px; background: #16a34a; width: 32px; margin-bottom: 12px; border-radius: 2px; }\n .ms-card p { font-size: 0.93em; color: #475569; margin: 0; line-height: 1.65; }\n .ms-card p strong { color: #14532d; }\n .ms-warranty { background: #0f172a; border-left: 5px solid #16a34a; border-radius: 0 6px 6px 0; padding: 20px 28px; margin: 28px 0; display: flex; align-items: center; gap: 20px; }\n .ms-warranty-badge { background: #16a34a; color: #ffffff; font-size: 1em; font-weight: 800; padding: 10px 16px; border-radius: 4px; white-space: nowrap; }\n .ms-warranty p { color: #cbd5e1; font-size: 0.93em; margin: 0; line-height: 1.6; }\n .ms-warranty strong { color: #ffffff; }\n .ms-fitment { list-style: none; margin: 14px 0 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }\n @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n .ms-fitment li { font-size: 0.93em; color: #334155; padding: 8px 12px; background: #f0fdf4; border-left: 3px solid #16a34a; border-radius: 0 4px 4px 0; }\n .ms-divider { border: none; border-top: 1px solid #e2e8f0; margin: 32px 0; }\n .ms-langboard { font-weight: 700; color: #14532d; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ms-wrap\"\u003e\n\n \u003c!-- HERO --\u003e\n \u003cdiv class=\"ms-hero\"\u003e\n \u003cspan class=\"ms-hero-badge\"\u003eMicro Series | Dual GUS-10 | Enclosure Only\u003c\/span\u003e\n \u003ch2\u003eDual GUS-10. 1.26 cu ft Total.\u003cbr\u003e0.60 cu ft Acoustic Per Driver: ResoNix's Optimum.\u003c\/h2\u003e\n \u003cp\u003eTwo ResoNix GUS-10 drivers. Two acoustically isolated sealed chambers. Each chamber holds 0.63 cubic feet gross, which after the GUS-10's 0.031 cubic foot driver displacement delivers 0.599 cubic feet of net acoustic airspace per driver. ResoNix's published 0.707 Qtc target is 0.60 cubic feet. The M10D-S GUS hits that target precisely in 8.25 inches of total depth. 1,000 watts RMS combined.\u003c\/p\u003e\n \u003cdiv class=\"ms-hero-stats\"\u003e\n \u003cdiv class=\"ms-stat\"\u003e\n \u003cspan class=\"ms-stat-num\"\u003e1.26\u003c\/span\u003e\n \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net Total\u003c\/span\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"ms-stat\"\u003e\n \u003cspan class=\"ms-stat-num\"\u003e0.60\u003c\/span\u003e\n \u003cspan class=\"ms-stat-label\"\u003eCu Ft Acoustic Per Driver\u003c\/span\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"ms-stat\"\u003e\n \u003cspan class=\"ms-stat-num\"\u003e8.25\"\u003c\/span\u003e\n \u003cspan class=\"ms-stat-label\"\u003eTotal Depth\u003c\/span\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"ms-stat\"\u003e\n \u003cspan class=\"ms-stat-num\"\u003e1,000W\u003c\/span\u003e\n \u003cspan class=\"ms-stat-label\"\u003eCombined RMS Rating\u003c\/span\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n \u003cdiv class=\"ms-alert\"\u003e\n \u003cstrong\u003eEnclosure only.\u003c\/strong\u003e ResoNix GUS-10 subwoofers are not included and must be purchased separately from ResoNix Sound Solutions. Both the D2 and D4 variants fit this enclosure. Select the impedance variant that matches your amplifier's stable load before ordering.\n \u003c\/div\u003e\n\n \u003c!-- SECTION 1: Volume --\u003e\n \u003cdiv class=\"ms-section\"\u003e\n \u003ch3\u003e0.63 cu ft Per Chamber: 0.60 cu ft Acoustic After Displacement\u003c\/h3\u003e\n \u003cp\u003eResoNix publishes a 0.707 Qtc target of 0.60 cubic feet of net acoustic airspace for the GUS-10. The GUS-10 has a driver displacement of 0.031 cubic feet. Each chamber in the M10D-S GUS is built to 0.63 cubic feet gross. After the driver is installed, each GUS-10 sees 0.599 cubic feet of net acoustic airspace, hitting ResoNix's 0.60 cubic foot target to within rounding. The 1.26 cu ft total listed is the gross volume across both chambers. The acoustic figure that matters for each driver is 0.60 cu ft per chamber.\u003c\/p\u003e\n \u003cp\u003eThis is the same acoustic alignment as the single M10-S GUS enclosure. Both are built to 0.63 cubic feet gross per driver position, delivering 0.599 cubic feet of net acoustic airspace per driver after displacement. Both drivers in the dual build load into identical acoustic conditions on each side of the enclosure divider.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- SECTION 2: Why Dual GUS-10 --\u003e\n \u003cdiv class=\"ms-section\"\u003e\n \u003ch3\u003eTwo GUS-10 Drivers, Double the Displacement, Same Alignment\u003c\/h3\u003e\n \u003cp\u003eThe GUS-10's case as the front sub platform rests on three things: 4.12 inches of mounting depth, Klippel-verified 18.37mm one-way Xmax, and a flat 0.707 Qtc sealed alignment that extends well below 20 Hz. A single GUS-10 delivers all of that from one driver. Two GUS-10 drivers in isolated 0.60 cubic foot chambers double the cone displacement, the variable that determines how much air is moved at any given frequency, and raise the combined power handling to 1,000 watts RMS.\u003c\/p\u003e\n \u003cp\u003eThe acoustic character does not change between the single and dual builds. Both GUS-10 drivers have Qts of 0.35 and Fs of 16.91 Hz. Each loads into a 0.707 Qtc sealed alignment. The response is flat and extended with deep low-frequency reach. The dual build makes the response louder and deeper: more cone displacement into the same acoustic loading per driver produces roughly 3 dB more low-frequency output.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- SECTION 3: Construction --\u003e\n \u003cdiv class=\"ms-section\"\u003e\n \u003ch3\u003e1,000W Combined, Double-Layer Baffle, Dowel Reinforced\u003c\/h3\u003e\n \u003cp\u003eThe front baffle is a double-layer stack-fab build, two CNC-cut Langboard Elite MDF panels bonded to 1.5 inches total. At 1,000 watts RMS combined across two high-excursion 10\" drivers, baffle resonance is a structural concern, not a theoretical one. The stack-fab assembly is reinforced with dowels throughout the build, adding mechanical alignment and shear resistance at every panel joint beyond what layer adhesion alone provides.\u003c\/p\u003e\n \u003cp\u003eThe chamber divider is CNC-cut to full wall thickness and stacked to the same standard as the exterior panels. It is a structural element, both chambers maintain their acoustic isolation and geometric integrity under sustained 1,000-watt operation.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- IMPEDANCE BLOCK --\u003e\n \u003cdiv class=\"ms-wiring\"\u003e\n \u003ch3\u003eImpedance Wiring: Know Before You Order\u003c\/h3\u003e\n \u003cdiv class=\"ms-wiring-row\"\u003e\n \u003cdiv class=\"ms-wiring-load\"\u003e2Ω\u003c\/div\u003e\n \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo GUS-10 D2: each wired series (4Ω per driver), then both in parallel 2Ω final.\u003c\/strong\u003e Recommended for most builds. Broadest amplifier compatibility. Target a monoblock delivering 800–1,000W RMS at 2Ω.\u003c\/div\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"ms-wiring-row\"\u003e\n \u003cdiv class=\"ms-wiring-load\"\u003e4Ω\u003c\/div\u003e\n \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo GUS-10 D4: each wired parallel (2Ω per driver), then both in series 4Ω final.\u003c\/strong\u003e Safest electrical configuration. Widest amplifier selection. Requires a strong 4Ω monoblock to reach the 1,000W combined ceiling.\u003c\/div\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"ms-wiring-row\"\u003e\n \u003cdiv class=\"ms-wiring-load\"\u003e8Ω\u003c\/div\u003e\n \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eTwo GUS-10 D4: each wired series (8Ω per driver), then both in parallel 4Ω final.\u003c\/strong\u003e Note: two D4s in series then parallel also yields 4Ω. For a true 8Ω load, wire two D4s in series only (one driver). Not a typical dual-driver configuration.\u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- WHY CARDS --\u003e\n \u003cdiv class=\"ms-card-grid\"\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n \u003ch4\u003e0.60 cu ft Acoustic Per Driver: ResoNix's 0.707 Qtc Target\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eEach chamber is built to \u003cstrong\u003e0.63 cu ft gross\u003c\/strong\u003e. After the GUS-10's 0.031 cu ft displacement, each driver sees \u003cstrong\u003e0.599 cu ft net acoustic airspace\u003c\/strong\u003e: essentially exactly ResoNix's published 0.60 cu ft optimum. Both chambers are identical. Both drivers load correctly.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eOutput\u003c\/span\u003e\n \u003ch4\u003e1,000W RMS Combined: Dual Klippel-Verified Xmax\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eTwo GUS-10 drivers at \u003cstrong\u003e500W RMS each\u003c\/strong\u003e with \u003cstrong\u003e18.37mm Klippel-verified Xmax\u003c\/strong\u003e per driver. Combined cone displacement doubles the output potential of the single GUS-10 build. Particularly below 30 Hz where cone area and linear excursion are the dominant output variables.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eChambers\u003c\/span\u003e\n \u003ch4\u003eDual Chamber, CNC Divider, Stack-Fabbed to Full Wall Thickness, Independently Sealed\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eA CNC-cut, stack-fabbed \u003cstrong\u003echamber divider\u003c\/strong\u003e separates both driver volumes completely. Neither GUS-10 shares airspace with the other. Each driver loads independently into its own 0.63 cu ft sealed chamber. Correct acoustic alignment on both sides.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eBaffle\u003c\/span\u003e\n \u003ch4\u003e1.5\" Double-Layer: Dowel Reinforced Stack Fab\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eTwo bonded layers of \u003cstrong\u003eLangboard Elite 3\/4\" MDF\u003c\/strong\u003e at 1.5 inches total, further reinforced with \u003cstrong\u003edowels throughout the assembly\u003c\/strong\u003e. At 1,000 watts RMS combined, double-layer stack-fab construction eliminates baffle resonance at the structural level.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eWiring\u003c\/span\u003e\n \u003ch4\u003eSingle Proline X Terminal Cup: Pre-Wired to Both Drivers\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eOne \u003cstrong\u003eProline X ABS\/carbon fiber terminal cup\u003c\/strong\u003e with stainless hardware and copper ring terminals serves the entire enclosure. Pre-wired internally with \u003cstrong\u003e12-gauge OFC\u003c\/strong\u003e to both driver positions. One amplifier run feeds both drivers.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n \u003ch4\u003e8\/32 Threaded Inserts: Machine Screws for Both Drivers\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eBoth baffle positions are fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e. Stainless machine screws are included for both GUS-10 drivers. Each driver mounts to steel, consistent clamping force, no stripping risk, clean reinstallation at any service interval.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eAlignment\u003c\/span\u003e\n \u003ch4\u003eIdentical 0.707 Qtc Character to the Single GUS-10\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eBoth GUS-10 drivers have \u003cstrong\u003eQts of 0.35, Fs of 16.91 Hz\u003c\/strong\u003e. Each loads into a 0.707 Qtc sealed alignment: flat anechoic response with deep extension. The dual build produces roughly \u003cstrong\u003e3 dB more low-frequency output\u003c\/strong\u003e than a single GUS-10 at equivalent power.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eClearance\u003c\/span\u003e\n \u003ch4\u003e23mm Minimum Front Clearance: Both Drivers\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eResoNix specifies \u003cstrong\u003e23mm minimum clearance\u003c\/strong\u003e between the GUS-10's surround and any surface in front of the driver. Confirm this at both driver positions against seat cushion, cargo cover, or any other nearby surface before finalizing the install.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eConfiguration\u003c\/span\u003e\n \u003ch4\u003eFront-Firing or Downfiring: Feet Included\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eRubber feet for \u003cstrong\u003edownfiring installation\u003c\/strong\u003e are included. The GUS-10's vented rear cone assembly allows the pole vent to be fully obstructed without acoustic penalty. Downfire is viable in tight enclosures. Choose the orientation that makes the install cleanest and most serviceable.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ms-card\"\u003e\n \u003cspan class=\"ms-card-label\"\u003eReinforcement\u003c\/span\u003e\n \u003ch4\u003eDowel-Reinforced Stack Fab: Three Mechanical Systems at Every Joint\u003c\/h4\u003e\n \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n \u003cp\u003eDowels throughout the stack-fab assembly resist shear forces at panel joints independent of adhesive condition. \u003cstrong\u003estack-fab construction + adhesive + dowels\u003c\/strong\u003e: all three systems locking every joint against sustained load across the life of the installation.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\n \u003c!-- HIGHLIGHT --\u003e\n \u003cdiv class=\"ms-highlight\"\u003e\n \u003ch3\u003eReady to Mount. Ready to Wire. Built for Active Systems.\u003c\/h3\u003e\n \u003cp\u003eThe M10D-S GUS ships fully prepped. The \u003cstrong\u003eProline X terminal cup\u003c\/strong\u003e is installed and pre-wired with 12-gauge OFC to both driver positions. Connect your amplifier run and wiring is complete. Both baffles use \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless machine screws included. Polyfill is factory-installed in both chambers independently. Rubber feet for downfiring are included.\u003c\/p\u003e\n \u003ch3\u003ePlan Your Wiring Before Selecting the Voice Coil Variant\u003c\/h3\u003e\n \u003cp\u003eThe GUS-10 is a dual voice coil driver: available in \u003cstrong\u003eDual 2Ω (D2)\u003c\/strong\u003e and \u003cstrong\u003eDual 4Ω (D4)\u003c\/strong\u003e. With two drivers the wiring combinations produce multiple final impedance options. The recommended configuration for most builds is \u003cstrong\u003etwo D2 drivers, each wired series (4Ω per driver), then both in parallel (2Ω final)\u003c\/strong\u003e. See the wiring chart above and confirm your amplifier's stable impedance before ordering. D2 T\/S parameters are not yet finalized by ResoNix. D4 data is published and is the basis for this enclosure's volume calculation.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- FITMENT --\u003e\n \u003cdiv class=\"ms-section\"\u003e\n \u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n \u003cp\u003eAt 34\" × 14.75\" × 8.25\", the M10D-S GUS is wider and deeper than the single GUS-10 enclosure but remains significantly more compact than any conventional dual 10\" sealed build. Measure carefully before ordering:\u003c\/p\u003e\n \u003cul class=\"ms-fitment\"\u003e\n \u003cli\u003eTrunk floor: full-size sedans and sport sedans\u003c\/li\u003e\n \u003cli\u003eCargo floor: mid-size and full-size SUVs\u003c\/li\u003e\n \u003cli\u003eBehind-seat: full-size crew cab trucks\u003c\/li\u003e\n \u003cli\u003eDual front sub builds: SQ systems\u003c\/li\u003e\n \u003cli\u003eSQ competition: maximum GUS-10 output at minimal depth\u003c\/li\u003e\n \u003cli\u003eHigh-output shallow installs: where two 10s replace one 12\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n\n \u003c!-- WARRANTY --\u003e\n \u003cdiv class=\"ms-warranty\"\u003e\n \u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n \u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures carry a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Built and inspected in our Tullahoma, Tennessee facility before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003chr class=\"ms-divider\"\u003e\n\n \u003cdiv class=\"ms-section\"\u003e\n \u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n \u003cp\u003eEvery Proline X Micro Series enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee on ShopSabre CNC routers. Chamber volume, divider placement, cutout geometry, baffle layer count, dowel placement, and terminal positioning are all held to spec on every unit. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e throughout: named, mill-documented, published density and bond specifications.\u003c\/p\u003e\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43219723911257,"sku":"M10D-S Gus","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-dual-10-sealed-enclosure-fits-resonix-gus-10subwoofer-enclosuresproline-x-9762679.webp?v=1779355148"},{"product_id":"proline-x-micro-series-dual-15-sealed-enclosure-fits-resonix-gus-15","title":"Proline X Micro Series Dual 15\" Sealed Enclosure | Built for ResoNix GUS-15","description":"\u003c!-- ============================================================\n     PROLINE X MICRO SERIES: Dual ResoNix GUS-15\n     SEALED DUAL 15\" ENCLOSURE ONLY\n     SKU: M15D-S GUS\n     External: 38\" W x 12\" H x 18\" D (downfire orientation, before 1.75\" feet)\n     Weight: 75 lbs\n     Gross volume: 2.85 cu ft (1.425 cu ft per chamber)\n     Acoustic net per driver: 1.35 cu ft after 0.072 cu ft displacement\n     ============================================================ --\u003e\n\n\u003cstyle\u003e\n  .ms-wrap * { box-sizing: border-box; }\n  .ms-wrap { font-family: inherit; color: #1e293b; line-height: 1.7; max-width: 1200px; margin: 0 auto; }\n\n  .ms-hero {\n    background: linear-gradient(135deg, #0f172a 0%, #14532d 100%);\n    border-radius: 8px;\n    padding: 40px 36px;\n    margin-bottom: 32px;\n    position: relative;\n    overflow: hidden;\n  }\n  .ms-hero::before {\n    content: '';\n    position: absolute;\n    top: -40px; right: -40px;\n    width: 220px; height: 220px;\n    background: rgba(22,163,74,0.12);\n    border-radius: 50%;\n    z-index: 0;\n  }\n  .ms-hero-badges {\n    position: relative;\n    z-index: 1;\n    text-align: center;\n    margin-bottom: 28px;\n  }\n  .ms-hero-middle {\n    position: relative;\n    z-index: 1;\n    display: grid;\n    grid-template-columns: 60% 40%;\n    gap: 32px;\n    align-items: center;\n    margin-bottom: 32px;\n  }\n  .ms-hero-text { }\n  .ms-hero-image {\n    display: flex;\n    align-items: center;\n    justify-content: center;\n  }\n  .ms-hero-image img {\n    max-width: 100%;\n    height: auto;\n    border-radius: 6px;\n    display: block;\n  }\n  @media (max-width: 560px) {\n    .ms-hero-middle { grid-template-columns: 1fr; 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}\n  .ms-stat { text-align: center; }\n  .ms-stat-num { display: block; color: #86efac; font-size: 1.5em; font-weight: 800; line-height: 1; }\n  .ms-stat-label { display: block; color: #94a3b8; font-size: 0.72em; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; }\n\n  .ms-section {\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-top: 4px solid #16a34a;\n    border-radius: 6px;\n    padding: 28px 36px;\n    margin-bottom: 24px;\n  }\n  .ms-section:nth-child(odd) { background: #f8fafc; }\n  .ms-section h3 { color: #14532d; font-size: 1.15em; font-weight: 700; margin: 0 0 14px 0; }\n  .ms-section p { color: #334155; font-size: 0.97em; margin: 0 0 12px 0; }\n  .ms-section p:last-child { margin-bottom: 0; }\n\n  .ms-highlight {\n    background: #f0fdf4;\n    border-left: 5px solid #16a34a;\n    padding: 22px 36px;\n    margin: 28px 0;\n    border-radius: 0 6px 6px 0;\n  }\n  .ms-highlight h3 { color: #14532d; margin: 0 0 10px 0; font-size: 1.1em; font-weight: 700; }\n  .ms-highlight h3 + h3 { margin-top: 18px; }\n  .ms-highlight p { margin-bottom: 10px; color: #1e293b; font-size: 0.97em; }\n  .ms-highlight p:last-child { margin-bottom: 0; }\n\n  .ms-alert {\n    background: #dcfce7;\n    border: 1px solid #16a34a;\n    border-radius: 6px;\n    padding: 16px 36px;\n    margin: 20px 0;\n    font-size: 0.93em;\n    color: #166534;\n  }\n  .ms-alert strong { color: #14532d; }\n\n  .ms-shipping {\n    background: #fef3c7;\n    border: 1px solid #d97706;\n    border-radius: 6px;\n    padding: 16px 36px;\n    margin: 20px 0;\n    font-size: 0.93em;\n    color: #78350f;\n  }\n  .ms-shipping strong { color: #78350f; }\n\n  .ms-strongest {\n    background: linear-gradient(135deg, #14532d 0%, #16a34a 100%);\n    border-radius: 8px;\n    padding: 32px 36px;\n    margin: 32px 0;\n    text-align: center;\n  }\n  .ms-strongest h3 { color: #ffffff; font-size: 1.4em; font-weight: 800; margin: 0 0 12px 0; letter-spacing: 0.02em; }\n  .ms-strongest p { color: #dcfce7; font-size: 1em; margin: 0; line-height: 1.6; max-width: 800px; margin-left: auto; margin-right: auto; }\n\n  .ms-wiring { background: #0f172a; border-radius: 6px; padding: 24px 36px; margin: 24px 0; }\n  .ms-wiring h3 { color: #86efac; font-size: 1em; font-weight: 700; margin: 0 0 16px 0; letter-spacing: 0.05em; text-transform: uppercase; }\n  .ms-wiring-row { display: flex; align-items: center; gap: 14px; padding: 10px 0; border-bottom: 1px solid #1e293b; }\n  .ms-wiring-row:last-child { border-bottom: none; padding-bottom: 0; }\n  .ms-wiring-load { background: #16a34a; color: #ffffff; font-size: 1.1em; font-weight: 800; padding: 8px 16px; border-radius: 4px; min-width: 90px; text-align: center; flex-shrink: 0; white-space: nowrap; }\n  .ms-wiring-desc { color: #cbd5e1; font-size: 0.93em; line-height: 1.5; flex: 1; }\n  .ms-wiring-desc strong { color: #ffffff; }\n\n  .ms-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 24px 0; }\n  @media (max-width: 600px) { .ms-card-grid { grid-template-columns: 1fr; } }\n  .ms-card { background: #ffffff; border: 1px solid #e2e8f0; border-top: 3px solid #16a34a; border-radius: 6px; padding: 22px; }\n  .ms-card-label { display: inline-block; background: #16a34a; color: #ffffff; font-size: 0.68em; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 3px 10px; border-radius: 3px; margin-bottom: 10px; }\n  .ms-card h4 { color: #14532d; font-size: 1em; font-weight: 700; margin: 0 0 10px 0; }\n  .ms-card-divider { height: 2px; background: #16a34a; width: 32px; margin-bottom: 12px; border-radius: 2px; }\n  .ms-card p { font-size: 0.93em; color: #475569; margin: 0; line-height: 1.65; }\n  .ms-card p strong { color: #14532d; }\n\n  .ms-warranty {\n    background: #0f172a;\n    border-left: 5px solid #16a34a;\n    border-radius: 0 6px 6px 0;\n    padding: 20px 36px;\n    margin: 28px 0;\n    display: flex;\n    align-items: center;\n    gap: 20px;\n  }\n  .ms-warranty-badge { background: #16a34a; color: #ffffff; font-size: 1em; font-weight: 800; padding: 10px 16px; border-radius: 4px; white-space: nowrap; }\n  .ms-warranty p { color: #cbd5e1; font-size: 0.93em; margin: 0; line-height: 1.6; }\n  .ms-warranty strong { color: #ffffff; }\n\n  .ms-fitment { list-style: none; margin: 14px 0 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }\n  @media (max-width: 560px) { .ms-fitment { grid-template-columns: 1fr; } }\n  .ms-fitment li { font-size: 0.93em; color: #334155; padding: 8px 12px; background: #f0fdf4; border-left: 3px solid #16a34a; border-radius: 0 4px 4px 0; }\n  .ms-divider { border: none; border-top: 1px solid #e2e8f0; margin: 32px 0; }\n  .ms-langboard { font-weight: 700; color: #14532d; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ms-wrap\"\u003e\n\n  \u003c!-- HERO --\u003e\n  \u003cdiv class=\"ms-hero\"\u003e\n    \u003cdiv class=\"ms-hero-badges\"\u003e\n      \u003cspan class=\"ms-hero-badge\"\u003eMicro Series | Dual GUS-15 | Enclosure Only\u003c\/span\u003e\u003cspan class=\"ms-hero-revision\"\u003eDesign Revision 5.20.26\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"ms-hero-middle\"\u003e\n      \u003cdiv class=\"ms-hero-text\"\u003e\n        \u003ch2\u003eThe Strongest Micro Series Enclosure We Build.\u003cbr\u003eDual GUS-15. Dual Chamber. 3,000W Combined.\u003c\/h2\u003e\n        \u003cp\u003eTwo ResoNix GUS-15 drivers in separate, acoustically isolated sealed chambers. Each chamber delivers exactly 1.35 cubic feet of net acoustic airspace per driver, hitting ResoNix's published 0.707 Qtc target precisely. Built with 1-inch walls, a double-face 1.5-inch flush-mount baffle, and internal bracing scaled to 3,000 watts RMS combined. This is the strongest, heaviest, and highest-output enclosure in the Proline X Micro Series lineup.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-hero-image\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-dual-15-sealed-enclosure-built-for-resonix-gus-15subwoofer-enclosuresproline-x-9360178.webp?v=1779355146\" alt=\"Proline X Micro Series dual 15-inch sealed enclosure for ResoNix GUS-15\"\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"ms-hero-stats\"\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e1.35\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCu Ft Net Per Driver\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e75\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eLbs Finished Weight\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003e3,000W\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eCombined RMS Rating\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ms-stat\"\u003e\n        \u003cspan class=\"ms-stat-num\"\u003eDual\u003c\/span\u003e\n        \u003cspan class=\"ms-stat-label\"\u003eChamber, Isolated\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- STRONGEST CALLOUT --\u003e\n  \u003cdiv class=\"ms-strongest\"\u003e\n    \u003ch3\u003eThe Strongest Enclosure in the Micro Series\u003c\/h3\u003e\n    \u003cp\u003e1-inch walls. Double-face 1.5-inch flush-mount baffle. Internal bracing scaled to 3,000 watts RMS combined driver output. Chamber divider CNC-cut to full wall thickness. Two independent terminal cups. Every structural element scaled up from the standard Micro Series spec. This is the enclosure we build when the driver combination and power level demand it.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ENCLOSURE ONLY NOTICE --\u003e\n  \u003cdiv class=\"ms-alert\"\u003e\n    \u003cstrong\u003eEnclosure only.\u003c\/strong\u003e ResoNix GUS-15 subwoofers are not included and must be purchased separately from ResoNix Sound Solutions. Both the D2 and D4 variants fit this enclosure. Select the impedance variant that matches your amplifier's stable load before ordering.\n  \u003c\/div\u003e\n\n  \u003c!-- SHIPPING NOTICE --\u003e\n  \u003cdiv class=\"ms-shipping\"\u003e\n    \u003cstrong\u003eFreight shipping applies.\u003c\/strong\u003e This enclosure ships at 75 pounds finished weight in the shipping crate. Standard ground shipping rates do not apply. Freight shipping is calculated at checkout based on delivery address. Contact Audio Intensity directly for freight quotes on residential deliveries with lift gate requirements.\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 1: Volume --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003e1.35 cu ft Net Acoustic Per Driver: Exactly ResoNix's 0.707 Qtc Target\u003c\/h3\u003e\n    \u003cp\u003eResoNix publishes a 0.707 Qtc target of 1.35 cubic feet of net acoustic airspace for the GUS-15. The GUS-15 has a driver displacement of 0.072 cubic feet. Each chamber in the M15D-S GUS is built to a gross internal volume that delivers 1.35 cubic feet of net acoustic airspace after the driver is installed. Both chambers are identical. Both drivers see identical acoustic conditions. Both produce identical T\/S response curves.\u003c\/p\u003e\n    \u003cp\u003eThis is exactly double the acoustic volume of the single M15-S GUS enclosure, by design. Each driver in this dual build gets the same acoustic environment a single GUS-15 gets in the single-driver enclosure. The dual configuration produces roughly 3 dB more low-frequency output than a single GUS-15 at equivalent power, and combined thermal capacity is 3,000 watts RMS. This is the highest-output single enclosure in the Proline X Micro Series lineup.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 2: Back-of-napkin math --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003e\"If I Do the Math on the External Dimensions, the Volume Looks Too Big\"\u003c\/h3\u003e\n    \u003cp\u003eThis is the most common question we get on Micro Series enclosures. The math customers run looks like this: external dimensions of 38\" × 12\" × 18\" subtract 1\" walls on all six sides (the M15D-S uses 1-inch walls, not 3\/4\"), leaving an assumed internal cavity of 36\" × 10\" × 16\". That works out to 5,760 cubic inches, or roughly 3.33 cubic feet. The listed total net acoustic volume is 2.70 cubic feet (1.35 per chamber × 2 chambers), a difference of about 0.63 cu ft, which looks like the enclosure must be oversized by about 23%.\u003c\/p\u003e\n    \u003cp\u003eThat math assumes five things that are not true on a Proline X dual-chamber stack-fab enclosure:\u003c\/p\u003e\n    \u003cp\u003e\u003cstrong\u003e1. The walls are not 1-inch on every side.\u003c\/strong\u003e The front baffle is a double-face flush-mount build at 1.5 inches thick, thicker than the exterior walls. That alone removes more internal depth than a 1-inch calculation accounts for.\u003c\/p\u003e\n    \u003cp\u003e\u003cstrong\u003e2. The enclosure is not a perfect rectangle.\u003c\/strong\u003e Viewed from above, all four corners are radiused at 3 inches. This is a deliberate design choice for two reasons: the rounded corners break up the parallel-wall geometry that creates internal standing waves, and they produce a finished shape that fits cleanly against vehicle interior surfaces without sharp corners catching on trim or upholstery. The 3\" radii remove measurable internal volume that an external-minus-walls calculation assumes is open airspace.\u003c\/p\u003e\n    \u003cp\u003e\u003cstrong\u003e3. The chamber divider takes up internal volume.\u003c\/strong\u003e A full CNC-cut chamber divider at 1-inch thickness separates the two driver chambers completely. That divider itself displaces internal volume that a single-cavity calculation ignores.\u003c\/p\u003e\n    \u003cp\u003e\u003cstrong\u003e4. The area directly behind each driver's magnet is precision-milled.\u003c\/strong\u003e This is a deliberate engineering step that serves two purposes. First, it allows us to make fine volume adjustments to hit the target airspace exactly. Second, and more importantly, it increases the open area immediately behind each driver's rear vent. The GUS-15's pole vent is part of the driver's voice coil cooling system. Air flows through the vent during cone movement, carrying heat away from the voice coil former. If the area immediately behind the vent is restricted, backpressure builds against that airflow and voice coil cooling is compromised. Most enclosure manufacturers do not understand this airflow dynamic, and even fewer engineer around it. We do.\u003c\/p\u003e\n    \u003cp\u003e\u003cstrong\u003e5. Each driver displaces 0.072 cubic feet of internal airspace once installed.\u003c\/strong\u003e Two drivers displace 0.144 cubic feet total. This is not subtracted from a back-of-napkin external calculation, but it is subtracted from what the drivers acoustically load into.\u003c\/p\u003e\n    \u003cp\u003e\u003cstrong\u003eHow we actually calculate volume.\u003c\/strong\u003e Our engineering approach is built on precision, and it is different from how most enclosure manufacturers calculate airspace and different from the math any customer can do from external dimensions. A Proline X stack-fab enclosure is built from individually CNC-cut layers, each with its own machined opening. We calculate the precise internal volume of every layer's opening on both sides of the chamber divider, then sum those layer-by-layer volumes to arrive at the actual net airspace inside each assembled chamber. No one else in this industry calculates net volume this way. It is the only method that produces a genuinely accurate account of the airspace each driver sees once the enclosure is built. The 1.35 cubic foot per-driver figure is exact, not approximate.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 3: Construction --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003e1\" Walls. 1.5\" Flush-Mount Double-Face Baffle. Chamber Divider. Internal Bracing.\u003c\/h3\u003e\n    \u003cp\u003eThe M15D-S GUS is constructed to a different structural standard than the rest of the Micro Series. The exterior walls are \u003cstrong\u003e1-inch thick Langboard Elite MDF\u003c\/strong\u003e, thicker than the standard 3\/4\" panels used elsewhere in the series. Panel rigidity scales with the cube of thickness, so moving from 3\/4\" to 1-inch produces a substantially stiffer wall than the numerical difference alone suggests. At 3,000 watts RMS combined driver output, the structural demands justify the additional thickness across the entire enclosure shell.\u003c\/p\u003e\n    \u003cp\u003eThe front baffle is a \u003cstrong\u003edouble-face 1.5-inch build\u003c\/strong\u003e: two bonded layers of Langboard Elite combined into a single rigid panel. Both GUS-15 drivers are \u003cstrong\u003eflush-mounted\u003c\/strong\u003e into the 1.5-inch baffle, with the mounting cutouts CNC-machined to sit each driver's flange perfectly flush with the baffle surface. Flush-mounting eliminates the frame-lip resonance that surface-mounted drivers can develop at high-excursion listening levels, and it produces a cleaner airflow path across the front of the cones.\u003c\/p\u003e\n    \u003cp\u003eThe chamber divider is CNC-cut at the same 1-inch thickness as the exterior walls. Additional internal bracing is integrated into the panel layering to control diaphragm-driven wall flex under sustained high-power operation. The stack-fab assembly is reinforced with dowels throughout, adding between-layer tension reinforcement that locks the panel stack against shear movement. Both chambers maintain their acoustic isolation independently under sustained 3,000-watt combined operation.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- IMPEDANCE BLOCK --\u003e\n  \u003cdiv class=\"ms-wiring\"\u003e\n    \u003ch3\u003eImpedance Wiring: Two Separate Terminal Cups\u003c\/h3\u003e\n    \u003cdiv class=\"ms-wiring-row\"\u003e\n      \u003cdiv class=\"ms-wiring-load\"\u003eSETUP\u003c\/div\u003e\n      \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003eEach chamber has its own dedicated terminal cup.\u003c\/strong\u003e Wire each driver independently from its own terminal cup. The final system impedance depends on whether you run each driver from a separate amplifier channel or bridge both into a single amp. Both terminals must present a load the amplifier can handle.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"ms-wiring-row\"\u003e\n      \u003cdiv class=\"ms-wiring-load\"\u003eD4\u003c\/div\u003e\n      \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003ePer driver: parallel = 2Ω, series = 8Ω.\u003c\/strong\u003e For a stereo monoblock or dual-amp setup, each amp sees 2Ω from its driver. For external bridging into one amp, calculate the bridged load accordingly.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"ms-wiring-row\"\u003e\n      \u003cdiv class=\"ms-wiring-load\"\u003eD2\u003c\/div\u003e\n      \u003cdiv class=\"ms-wiring-desc\"\u003e\n\u003cstrong\u003ePer driver: parallel = 1Ω, series = 4Ω.\u003c\/strong\u003e D2 T\/S parameters not yet finalized by ResoNix. Confirm before selecting D2 variant. Plan amplifier impedance handling carefully. Sustained 1Ω operation requires explicit amplifier rating.\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WHY CARDS --\u003e\n  \u003cdiv class=\"ms-card-grid\"\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eVolume\u003c\/span\u003e\n      \u003ch4\u003e1.35 cu ft Net Per Driver: ResoNix's 0.707 Qtc Target\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eEach chamber is built to deliver \u003cstrong\u003e1.35 cu ft of net acoustic airspace per driver\u003c\/strong\u003e after the GUS-15's 0.072 cu ft displacement is accounted for. Both chambers identical. Both drivers load correctly. ResoNix's target hit precisely, not approximately.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eOutput\u003c\/span\u003e\n      \u003ch4\u003e3,000W RMS Combined: Highest in the Micro Series\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eTwo GUS-15 drivers at \u003cstrong\u003e1,500W RMS each\u003c\/strong\u003e with \u003cstrong\u003e25.89mm Klippel-verified Xmax\u003c\/strong\u003e per driver. Combined cone displacement across \u003cstrong\u003e1,608 cm² of effective area\u003c\/strong\u003e. The maximum-output enclosure in the Proline X Micro Series lineup.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eWalls\u003c\/span\u003e\n      \u003ch4\u003e1\" Langboard Elite: Thicker Than Standard Micro Series\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eExternal walls are \u003cstrong\u003e1-inch thick Langboard Elite MDF\u003c\/strong\u003e, thicker than the 3\/4\" used elsewhere in the series. Panel rigidity scales with the cube of thickness, not linearly. At 3,000W RMS the additional thickness is structurally required.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eBaffle\u003c\/span\u003e\n      \u003ch4\u003e1.5\" Double-Face Flush-Mount Baffle\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eTwo bonded layers of Langboard Elite combined into a \u003cstrong\u003esingle 1.5-inch rigid panel\u003c\/strong\u003e. Both GUS-15 drivers \u003cstrong\u003eflush-mounted\u003c\/strong\u003e for zero frame-lip resonance and cleaner cone airflow at high excursion. Reinforced with dowels throughout.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eChambers\u003c\/span\u003e\n      \u003ch4\u003eDual Chamber: 1\" CNC Divider, Independently Sealed\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eA CNC-cut \u003cstrong\u003echamber divider at 1-inch thickness\u003c\/strong\u003e (matching the exterior wall spec) separates both driver volumes completely. Neither GUS-15 shares airspace with the other. Both chambers maintain acoustic isolation under sustained 3,000W operation.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eTerminals\u003c\/span\u003e\n      \u003ch4\u003eTwo Terminal Cups: One Per Chamber, Independently Wired\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eEach chamber has its own \u003cstrong\u003eProline X ABS\/carbon fiber terminal cup\u003c\/strong\u003e with stainless hardware and copper ring terminals. Pre-wired internally with \u003cstrong\u003e12-gauge OFC\u003c\/strong\u003e to its own driver position. Independent connection paths, no cross-chamber wiring.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eBracing\u003c\/span\u003e\n      \u003ch4\u003eIntegrated Internal Bracing Throughout\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eInternal bracing is integrated into the CNC-cut panel layering to control \u003cstrong\u003ediaphragm-driven wall flex\u003c\/strong\u003e under sustained high-power operation. Combined with 1-inch walls and the double-face baffle, three independent structural systems resist panel movement.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eMounting\u003c\/span\u003e\n      \u003ch4\u003e8\/32 Threaded Inserts: Machine Screws for Both Drivers\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eBoth baffle positions are fitted with \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e. Stainless machine screws included for both GUS-15 drivers. Each driver mounts to steel. Consistent clamping force across all eight mounting points per driver, no stripping at 3,000W sustained load.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eDownfire\u003c\/span\u003e\n      \u003ch4\u003e1.75\" Downfire Feet Included\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eShips in downfire orientation with \u003cstrong\u003e1.75-inch feet included\u003c\/strong\u003e. Total installed height in downfire mode is 13.75 inches (12\" enclosure height + 1.75\" feet). Feet couple the enclosure to the vehicle floor across the full 38-inch width for even bass distribution.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eClearance\u003c\/span\u003e\n      \u003ch4\u003e33mm Minimum Front Clearance: Both Drivers\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eResoNix specifies \u003cstrong\u003e33mm minimum clearance\u003c\/strong\u003e between the GUS-15's surround and any surface in front of the driver. Confirm this at both driver positions before finalizing the install. At 25.89mm of Xmax, this clearance is the operating envelope of the suspension. Not optional.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003eCorners\u003c\/span\u003e\n      \u003ch4\u003e3\" Radiused Corners: Organic Shape, Standing Wave Control\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eAll four corners are \u003cstrong\u003eradiused at 3 inches\u003c\/strong\u003e viewed top-down. The organic shape breaks up parallel-wall standing wave geometry inside each chamber and produces a finished form that fits cleanly against vehicle interior surfaces without sharp corners catching on trim.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"ms-card\"\u003e\n      \u003cspan class=\"ms-card-label\"\u003ePolyfill\u003c\/span\u003e\n      \u003ch4\u003eWall-Lining Application, Both Chambers\u003c\/h4\u003e\n      \u003cdiv class=\"ms-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003ePolyfill is installed as a \u003cstrong\u003elight wall-lining application\u003c\/strong\u003e in both chambers. This dampens internal panel reflections without artificially increasing apparent acoustic volume. Each chamber's 1.35 cu ft net acoustic airspace per driver is unchanged by the polyfill installation.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- HIGHLIGHT --\u003e\n  \u003cdiv class=\"ms-highlight\"\u003e\n    \u003ch3\u003eTwo Terminal Cups, Independent Wiring, Maximum Flexibility\u003c\/h3\u003e\n    \u003cp\u003eUnlike the other Micro Series dual builds, the M15D-S GUS uses \u003cstrong\u003etwo separate Proline X terminal cups\u003c\/strong\u003e: one per chamber, each pre-wired to its own driver with 12-gauge OFC. This gives complete flexibility in amplifier configuration. Run each driver from its own monoblock for maximum power and channel separation, or bridge both into a single high-output amplifier with external wiring. Each chamber's terminal is a standalone connection. There is no internal cross-chamber wiring.\u003c\/p\u003e\n    \u003ch3\u003ePlan Your Amplifier Configuration Before Ordering\u003c\/h3\u003e\n    \u003cp\u003eThe GUS-15 is available in \u003cstrong\u003eDual 2Ω (D2)\u003c\/strong\u003e and \u003cstrong\u003eDual 4Ω (D4)\u003c\/strong\u003e configurations. D4 parameters are published. D2 parameters are not yet finalized by ResoNix. For most builds, D4 wired parallel per driver (2Ω each terminal cup) into separate 2Ω-stable monoblocks delivering 1,200 to 1,500 watts RMS per driver is the practical target. Confirm your amplifier strategy before selecting the voice coil variant.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FITMENT --\u003e\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n    \u003cp\u003eThe M15D-S GUS is the largest and heaviest enclosure in the Micro Series. External footprint in downfire orientation is 38 inches wide, 12 inches tall (before adding the 1.75-inch downfire feet), and 18 inches deep. Total installed height in downfire mode is 13.75 inches. Measure carefully:\u003c\/p\u003e\n    \u003cul class=\"ms-fitment\"\u003e\n      \u003cli\u003eTruck bed: full-size crew cab and long-bed trucks\u003c\/li\u003e\n      \u003cli\u003eCargo floor: full-size SUVs and vans\u003c\/li\u003e\n      \u003cli\u003eTrunk floor: full-size sedans with wide trunk openings\u003c\/li\u003e\n      \u003cli\u003eBehind-seat: full-size crew cab trucks (verify cab depth)\u003c\/li\u003e\n      \u003cli\u003eSQ competition: maximum dual-driver GUS-15 output\u003c\/li\u003e\n      \u003cli\u003eShow vehicle builds: maximum bass capability at minimum depth\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WARRANTY --\u003e\n  \u003cdiv class=\"ms-warranty\"\u003e\n    \u003cdiv class=\"ms-warranty-badge\"\u003e2-Year Warranty\u003c\/div\u003e\n    \u003cp\u003e\u003cstrong\u003eAll Proline X Micro Series enclosures carry a two-year manufacturer's warranty\u003c\/strong\u003e against defects in materials and workmanship. Built and inspected in our Tullahoma, Tennessee facility before shipment. Contact Audio Intensity directly for warranty support.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003chr class=\"ms-divider\"\u003e\n\n  \u003cdiv class=\"ms-section\"\u003e\n    \u003ch3\u003eMade in Tennessee\u003c\/h3\u003e\n    \u003cp\u003eEvery Proline X Micro Series enclosure is CNC-cut and hand-assembled in Tullahoma, Tennessee on ShopSabre CNC routers. Chamber volume, divider placement, cutout geometry, layer-by-layer opening dimensions, baffle layer count, dowel placement, terminal positioning, and wall thickness are all held to spec on every unit. \u003cspan class=\"ms-langboard\"\u003eLangboard Elite MDF\u003c\/span\u003e throughout: named, mill-documented, published density and bond specifications.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43327941804121,"sku":"M15D-S Gus","price":699.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-dual-15-sealed-enclosure-built-for-resonix-gus-15subwoofer-enclosuresproline-x-9360178.webp?v=1779355146"},{"product_id":"performance-optimized-down-fire-sealed-10-dual-enclosure-audiomobile-gt2","title":"Performance Optimized Down Fire Sealed 10\" Dual Enclosure | Audiomobile GT2","description":"\u003cdiv 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p{margin-bottom:10px;font-size:0.97em;color:#cbd5e1 !important;}\n.podf-highlight p:last-child{margin-bottom:0;}\n.podf-alert{background:#0b2b34 !important;border:1px solid #06b6d4 !important;border-radius:6px;padding:14px 18px;margin:22px 0;font-size:0.93em;}\n.podf-alert p{color:#a5f3fc !important;margin:0;}\n.podf-alert strong{color:#67e8f9 !important;}\n.podf-clearance{background:#0f172a !important;border:2px solid #06b6d4 !important;border-radius:8px;padding:22px 24px;margin:28px 0;}\n.podf-clearance-label{display:inline-block;background:#06b6d4 !important;color:#04222b !important;font-size:0.68em;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;padding:4px 11px;border-radius:3px;margin-bottom:12px;}\n.podf-clearance h3{margin-top:0;}\n.podf-card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:24px 0;}\n@media(max-width:600px){.podf-card-grid{grid-template-columns:1fr;}}\n.podf-card{background:#1a2740 !important;border:1px solid #2c405c !important;border-top:3px solid #06b6d4 !important;border-radius:6px;padding:22px;}\n.podf-card-label{display:inline-block;background:#06b6d4 !important;color:#04222b !important;font-size:0.68em;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;padding:3px 10px;border-radius:3px;margin-bottom:10px;}\n.podf-card h4{margin:0 0 10px 0;}\n.podf-card-divider{height:2px;background:#06b6d4 !important;width:32px;margin-bottom:12px;border-radius:2px;}\n.podf-card p{font-size:0.93em;color:#b6c4d6 !important;margin:0;line-height:1.65;}\n.podf-card p strong{color:#67e8f9 !important;}\n.podf-table{width:100% !important;border-collapse:collapse;margin:22px 0;font-size:0.94em;}\n.podf-table th{background:#0e7490 !important;color:#ffffff !important;text-align:left;padding:11px 14px;font-weight:700;font-size:0.9em;letter-spacing:0.04em;text-transform:uppercase;border-bottom:1px solid #22384f !important;}\n.podf-table td{padding:10px 14px;border-bottom:1px solid #22384f !important;color:#dbe4ef !important;background:#111c30 !important;}\n.podf-table tr:nth-child(even) td{background:#1a2740 !important;}\n.podf-table td:first-child{font-weight:600;color:#67e8f9 !important;width:45%;}\n.podf-chartbox{display:block !important;width:100% !important;max-width:100% !important;margin:22px 0 !important;}\n.podf-chart{display:block !important;width:100% !important;max-width:100% !important;height:auto !important;}\n.podf-cta{background:linear-gradient(135deg,#0f172a 0%,#0e7490 100%) !important;border-radius:8px;padding:28px 26px;margin:32px 0 0 0;text-align:center;}\n.podf-cta h3{color:#ffffff !important;margin:0 0 10px 0;}\n.podf-cta p{color:#e2e8f0 !important;margin:0;font-size:0.97em;}\n.podf-cta a{color:#a5f3fc !important;}\n\u003c\/style\u003e\n\n\u003cdiv class=\"podf-hero\"\u003e\n\u003cspan class=\"podf-eyebrow\"\u003eProline X | Performance Optimized Down Fire\u003c\/span\u003e\n\u003ch2\u003eTwo Audiomobile GT2 2010s. Eight and a Half Inches Tall. Firing Into the Floor.\u003c\/h2\u003e\n\u003cp\u003eA sealed dual 10 enclosure cut to the Audiomobile GT2 2010 and nothing else. The drivers face down, the cargo floor stays flat and usable, and the cabinet clears rear deck lines that a conventional dual 10 box cannot get near.\u003c\/p\u003e\n\u003cdiv class=\"podf-badges\"\u003e\n\u003cspan class=\"podf-badge\"\u003e1.20 CU FT NET\u003c\/span\u003e\n\u003cspan class=\"podf-badge\"\u003e8.5 IN TALL CABINET\u003c\/span\u003e\n\u003cspan class=\"podf-badge\"\u003eDOWN FIRE OR FORWARD FIRE\u003c\/span\u003e\n\u003cspan class=\"podf-badge\"\u003eFEET INCLUDED\u003c\/span\u003e\n\u003cspan class=\"podf-badge\"\u003eBUILT IN TULLAHOMA, TN\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"podf-section\"\u003e\n\u003ch3\u003eBuilt for One Driver, Not for a Size Class\u003c\/h3\u003e\n\u003cp\u003ePerformance Optimized enclosures are engineered around a specific subwoofer. This one is cut to the \u003cstrong\u003eAudiomobile GT2 2010\u003c\/strong\u003e, a 10 inch driver with 400 watts RMS of power handling, 11.9mm of one way Xmax, and only 4.25 inches of mounting depth. Those numbers are unusual together, and they are what make a cabinet this shallow possible in the first place.\u003c\/p\u003e\n\u003cp\u003eThe GT2 2010 asks for a small chamber. Audiomobile's own minimum sealed figure is 0.50 cubic feet. This enclosure gives each driver \u003cstrong\u003e0.60 cubic feet of net airspace in a common chamber\u003c\/strong\u003e, which sits comfortably inside the driver's working range while keeping the cabinet down to 8.5 inches of external height. The cutouts are 9.2 inches, matched to the driver's gasket ID, and the mounting pattern comes from the actual driver rather than a spec sheet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"podf-section-alt\"\u003e\n\u003ch3\u003eWhy Down Fire\u003c\/h3\u003e\n\u003cp\u003eTurning the drivers toward the floor is not a styling decision. It changes what the enclosure does to the space around it and what the space around it can do to the enclosure.\u003c\/p\u003e\n\u003cdiv class=\"podf-card-grid\"\u003e\n\u003cdiv class=\"podf-card\"\u003e\n\u003cspan class=\"podf-card-label\"\u003eBoundary\u003c\/span\u003e\u003cdiv class=\"podf-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eThe Floor Is Right There\u003c\/h4\u003e\n\u003cp\u003eThe drivers radiate into a hard surface 1.75 inches away. In a trunk or cargo area that reinforcement, combined with cabin gain, is what makes a compact sealed box feel bigger than its airspace.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"podf-card\"\u003e\n\u003cspan class=\"podf-card-label\"\u003eProtection\u003c\/span\u003e\u003cdiv class=\"podf-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eNothing Lands on the Cone\u003c\/h4\u003e\n\u003cp\u003eGroceries, tools, luggage, and dogs never touch a surround that is facing down. The most common cause of a damaged subwoofer in a daily driven vehicle is \u003cstrong\u003ecargo, not power\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"podf-card\"\u003e\n\u003cspan class=\"podf-card-label\"\u003ePackaging\u003c\/span\u003e\u003cdiv class=\"podf-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eA Flat Top You Can Use\u003c\/h4\u003e\n\u003cp\u003eNo baskets, no grilles, no protrusions. The top of the cabinet is a flat carpeted surface, which in most vehicles means you get the cargo floor back instead of building around a box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"podf-card\"\u003e\n\u003cspan class=\"podf-card-label\"\u003eFlexibility\u003c\/span\u003e\u003cdiv class=\"podf-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eNot Locked Into One Orientation\u003c\/h4\u003e\n\u003cp\u003eThe feet ship without predrilled holes on purpose. Mount them where your floor wants them, or leave them off entirely and run the cabinet \u003cstrong\u003eforward firing\u003c\/strong\u003e if your install calls for it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"podf-clearance\"\u003e\n\u003cspan class=\"podf-clearance-label\"\u003eFeet and Clearance\u003c\/span\u003e\n\u003ch3\u003eWhat Ships With the Enclosure\u003c\/h3\u003e\n\u003cp\u003eFour feet come standard with every Performance Optimized Down Fire enclosure. There is no upgrade tier and no separate accessory to buy.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eABS and carbon fiber composite\u003c\/strong\u003e, machined in house on the same equipment as our terminal cups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.75 inches of lift\u003c\/strong\u003e, which sets the working air gap between the baffle and the floor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo predrilled mounting holes\u003c\/strong\u003e, so the enclosure is never locked into a single orientation. Set them where they suit your floor, or omit them and run forward firing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall height with feet installed: 10.25 inches.\u003c\/strong\u003e Cabinet alone is 8.5 inches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"podf-alert\"\u003e\u003cp\u003e\u003cstrong\u003eKeep the gap clear.\u003c\/strong\u003e The 1.75 inch space under the baffle is the air path, not empty room. A spare tire, a toolbox, or a folded moving blanket pressed against the opening will choke the output. Down fire systems that sound dead almost always have something jammed underneath them.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"podf-section\"\u003e\n\u003ch3\u003eBefore You Buy: Read the Impedance\u003c\/h3\u003e\n\u003cp\u003eThe GT2 2010 runs a \u003cstrong\u003esingle 3 ohm nominal voice coil at 2.8 ohms DCR\u003c\/strong\u003e. This is not a standard car audio impedance and there is no dual 2 ohm or dual 4 ohm version of the driver. Two of them in this enclosure give you exactly two options.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eParallel, 1.5 ohms nominal.\u003c\/strong\u003e Requires a 1 ohm stable monoblock. An amplifier in the 800 to 1000 watt RMS range is the clean match and the configuration we recommend.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries, 6 ohms nominal.\u003c\/strong\u003e Most amplifiers will drive 6 ohms, but output falls to roughly 40 to 50 percent of the 1 ohm rating. This is the path when your amplifier is not 1 ohm stable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSettle the amplifier question before the enclosure ships. It is the single decision that determines what this system is capable of.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"podf-section-alt\"\u003e\n\u003ch3\u003eHow It Is Built\u003c\/h3\u003e\n\u003cdiv class=\"podf-highlight\"\u003e\n\u003ch3\u003eCabinet\u003c\/h3\u003e\n\u003cp\u003eCut on our ShopSabre CNC from Langboard Elite MDF and assembled with V groove and dado joinery, with internal bracing and a \u003cstrong\u003edouble baffle\u003c\/strong\u003e at 1.5 inches. Every panel meets on a machined joint rather than a butt seam, so the cabinet stays rigid and puts its energy into the drivers instead of the panels. Internal height under the top panel is 6.25 inches against the driver's 4.25 inch mounting depth, so the motors clear with room to breathe.\u003c\/p\u003e\n\u003ch3\u003eMounting Pattern Drawn In House\u003c\/h3\u003e\n\u003cp\u003eWe have the GT2 2010 in the shop. We measured it, built the bolt circle in CAD, and the nutsert locations and the cutout are machined in the same operation from the same origin on the router. \u003cstrong\u003eThe holes cannot drift relative to each other, because the machine never re-references between them.\u003c\/strong\u003e Threaded inserts are installed and 8\/32 machine screws are supplied, so the drivers can come out and go back in as many times as the build requires.\u003c\/p\u003e\n\u003ch3\u003eWiring and Damping\u003c\/h3\u003e\n\u003cp\u003eThe Proline X ABS and carbon fiber composite terminal cup is \u003cstrong\u003eside mounted\u003c\/strong\u003e, which keeps the connection accessible with the enclosure sitting on its feet. Pre wired with 12 gauge OFC to both driver positions. Polyfill is installed before the enclosure leaves the shop.\u003c\/p\u003e\n\u003ch3\u003eFinish\u003c\/h3\u003e\n\u003cp\u003eCharcoal gray trunk liner standard, plush black available. The lasered acrylic badge mounts on the front face rather than the woofer face, so it stays visible in the down fire orientation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"podf-section\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eExternal dimensions are \u003cstrong\u003e29.5 inches wide by 8.5 inches tall by 16 inches deep\u003c\/strong\u003e, or 10.25 inches tall with the feet installed. The 8.5 inch cabinet height clears the rear deck line on most full size sedans and sits under most cargo covers.\u003c\/p\u003e\n\u003cdiv class=\"podf-alert\"\u003e\u003cp\u003e\u003cstrong\u003eMeasure the width first.\u003c\/strong\u003e At 29.5 inches this is a full width enclosure. Height is the spec that makes this design interesting, but width is the spec that decides whether it goes in your vehicle. There is no compact or behind seat version of this enclosure.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"podf-section\"\u003e\n\u003ch3\u003eEnclosure Performance\u003c\/h3\u003e\n\u003cp\u003eEvery Proline X enclosure is designed to a target alignment rather than a convenient box size. These are the sealed alignment figures for the Audiomobile GT2 2010 across the usable volume range, calculated from the published Thiele-Small parameters: Fs 27.5 Hz, Qts 0.61, Vas 1.17 cu ft.\u003c\/p\u003e\n\u003ctable class=\"podf-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eVolume Per Driver\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.50 cu ft (minimum)\u003c\/td\u003e\n\u003ctd\u003e1.115\u003c\/td\u003e\n\u003ctd\u003e50.3 Hz\u003c\/td\u003e\n\u003ctd\u003e37.9 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e0.60 cu ft (this enclosure)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e1.048\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e47.2 Hz\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e36.4 Hz\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.75 cu ft (maximum practical)\u003c\/td\u003e\n\u003ctd\u003e0.976\u003c\/td\u003e\n\u003ctd\u003e44.0 Hz\u003c\/td\u003e\n\u003ctd\u003e35.0 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv class=\"podf-chartbox\"\u003e\n\u003csvg class=\"podf-chart\" width=\"1260\" height=\"420\" viewbox=\"0 0 1260 420\" preserveaspectratio=\"xMidYMid meet\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display:block !important;width:100% !important;max-width:100% !important;height:auto 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1125,101 1148,102 1170,102\" fill=\"none\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/polyline\u003e\n\u003cpolyline points=\"90,298 112,285 135,273 158,261 180,248 202,236 225,223 248,211 270,198 292,186 315,174 338,162 360,151 382,140 405,130 428,120 450,112 472,105 495,99 518,94 540,90 562,87 585,85 608,84 630,84 653,84 675,84 698,85 720,86 742,87 765,88 788,89 810,90 832,91 855,92 878,93 900,94 922,95 945,96 968,97 990,97 1012,98 1035,98 1058,99 1080,99 1102,100 1125,100 1148,101 1170,101\" fill=\"none\" stroke=\"#22d3ee\" stroke-width=\"4.5\"\u003e\u003c\/polyline\u003e\n\u003ctext x=\"82\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e20\u003c\/text\u003e\n\u003ctext x=\"272\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e30\u003c\/text\u003e\n\u003ctext x=\"512\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e50\u003c\/text\u003e\n\u003ctext x=\"833\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e100\u003c\/text\u003e\n\u003ctext x=\"1158\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e200\u003c\/text\u003e\n\u003ctext x=\"560\" y=\"404\" font-size=\"17\" fill=\"#22d3ee\" font-family=\"sans-serif\" font-weight=\"700\"\u003eFrequency (Hz)\u003c\/text\u003e\n\u003ctext x=\"48\" y=\"56\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e+4\u003c\/text\u003e\n\u003ctext x=\"58\" y=\"178\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e-5\u003c\/text\u003e\n\u003ctext x=\"48\" y=\"246\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e-10\u003c\/text\u003e\n\u003ctext x=\"48\" y=\"314\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e-15\u003c\/text\u003e\n\u003ctext x=\"102\" y=\"36\" font-size=\"16\" fill=\"#67e8f9\" font-family=\"sans-serif\" font-weight=\"700\"\u003eAnechoic half-space response, no cabin gain\u003c\/text\u003e\n\u003cline x1=\"880\" y1=\"270\" x2=\"930\" y2=\"270\" stroke=\"#22d3ee\" stroke-width=\"4.5\"\u003e\u003c\/line\u003e\n\u003ctext x=\"942\" y=\"276\" font-size=\"16\" fill=\"#e2e8f0\" font-family=\"sans-serif\" font-weight=\"700\"\u003e0.60 cu ft, this enclosure\u003c\/text\u003e\n\u003cline x1=\"880\" y1=\"302\" x2=\"930\" y2=\"302\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/line\u003e\n\u003ctext x=\"942\" y=\"308\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e0.50 and 0.75 cu ft\u003c\/text\u003e\n\u003c\/svg\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"podf-alert\"\u003e\u003cp\u003e\u003cstrong\u003eRead the curve honestly.\u003c\/strong\u003e The GT2 2010 has a Qts of 0.61, which means it cannot reach a textbook 0.707 Qtc in any enclosure that fits in a vehicle. You would need 3.41 cu ft per driver. At 0.60 cu ft this alignment lands at Qtc 1.048, which puts a roughly 1.5 dB lift around 47 Hz and an anechoic F3 of 36.4 Hz. That is an impact alignment, not a flat one. Loaded into a trunk or cargo floor and firing down, cabin gain fills in below the knee and the result is a punchy, high output system. If you want a flat sealed alignment above all else, this is not the driver or the enclosure for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eRun your own numbers with the \u003ca href=\"\/pages\/sealed-box-calculator\"\u003eSealed Box Calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"podf-section\"\u003e\n\u003cp\u003eFull dimensions, cutout, mounting depth, and hardware details are listed under the \u003cstrong\u003eEnclosures\u003c\/strong\u003e tab.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"podf-cta\"\u003e\n\u003ch3\u003eCut for the GT2 2010. Built in Tennessee.\u003c\/h3\u003e\n\u003cp\u003eOrder it as a bare enclosure or loaded with a matched pair of Audiomobile GT2 2010 subwoofers, wired and ready to connect. Every Performance Optimized Down Fire enclosure is built to order in Tullahoma, Tennessee. Questions on fitment or amplifier matching, call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Plush Black \/ Box Only","offer_id":44389901303897,"sku":"PO10D-S DF AM BO B","price":304.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Loaded with two Audiomobile GT2 2010","offer_id":44389901336665,"sku":"PO10D-S DF AM LD B","price":579.99,"currency_code":"USD","in_stock":true},{"title":"Grey \/ Box Only","offer_id":44389901238361,"sku":"PO10D-S DF AM BO G","price":294.99,"currency_code":"USD","in_stock":true},{"title":"Grey \/ Loaded with two Audiomobile GT2 2010","offer_id":44389901271129,"sku":"PO10D-S DF AM LD G","price":569.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PDF10D-SAMFront.png?v=1785798600"},{"product_id":"proline-x-p10-s-df-single-10-sealed-down-fire-subwoofer-enclosure","title":"Proline X P10-S DF | Single 10\" Sealed Down Fire Subwoofer Enclosure","description":"\u003cdiv class=\"df-wrap\"\u003e\n\u003cstyle\u003e\n.df-wrap{font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Helvetica,Arial,sans-serif;line-height:1.7;color:#cbd5e1 !important;}\n.df-wrap p{color:#cbd5e1 !important;margin:0 0 14px 0;}\n.df-wrap ul{margin:0 0 16px 0;padding-left:20px;}\n.df-wrap li{color:#cbd5e1 !important;margin-bottom:8px;}\n.df-wrap strong{color:#67e8f9 !important;}\n.df-wrap a{color:#22d3ee !important;font-weight:700;text-decoration:underline;}\n.df-hero{background:linear-gradient(135deg,#0f172a 0%,#0e7490 100%) !important;border-radius:8px;padding:32px 28px;margin-bottom:28px;}\n.df-eyebrow{display:inline-block;color:#67e8f9 !important;font-size:0.72em;font-weight:700;letter-spacing:0.14em;text-transform:uppercase;margin-bottom:10px;}\n.df-hero h2{color:#ffffff !important;font-size:1.55em;font-weight:700;margin:0 0 12px 0;line-height:1.3;}\n.df-hero p{color:#e2e8f0 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!important;border-radius:8px;padding:22px 24px;margin:28px 0;}\n.df-clearance-label{display:inline-block;background:#06b6d4 !important;color:#04222b !important;font-size:0.68em;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;padding:4px 11px;border-radius:3px;margin-bottom:12px;}\n.df-clearance h3{margin-top:0;}\n.df-card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:24px 0;}\n@media(max-width:600px){.df-card-grid{grid-template-columns:1fr;}}\n.df-card{background:#1a2740 !important;border:1px solid #2c405c !important;border-top:3px solid #06b6d4 !important;border-radius:6px;padding:22px;}\n.df-card-label{display:inline-block;background:#06b6d4 !important;color:#04222b !important;font-size:0.68em;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;padding:3px 10px;border-radius:3px;margin-bottom:10px;}\n.df-card h4{margin:0 0 10px 0;}\n.df-card-divider{height:2px;background:#06b6d4 !important;width:32px;margin-bottom:12px;border-radius:2px;}\n.df-card p{font-size:0.93em;color:#b6c4d6 !important;margin:0;line-height:1.65;}\n.df-card p strong{color:#67e8f9 !important;}\n.df-table{width:100% !important;border-collapse:collapse;margin:22px 0;font-size:0.94em;}\n.df-table th{background:#0e7490 !important;color:#ffffff !important;text-align:left;padding:11px 14px;font-weight:700;font-size:0.9em;letter-spacing:0.04em;text-transform:uppercase;border-bottom:1px solid #22384f !important;}\n.df-table td{padding:10px 14px;border-bottom:1px solid #22384f !important;color:#dbe4ef !important;background:#111c30 !important;}\n.df-table tr:nth-child(even) td{background:#1a2740 !important;}\n.df-table td:first-child{font-weight:600;color:#67e8f9 !important;width:34%;}\n.df-chartbox{display:block !important;width:100% !important;max-width:100% !important;margin:22px 0 !important;}\n.df-chart{display:block !important;width:100% !important;max-width:100% !important;height:auto !important;}\n.df-cta{background:linear-gradient(135deg,#0f172a 0%,#0e7490 100%) !important;border-radius:8px;padding:28px 26px;margin:32px 0 0 0;text-align:center;}\n.df-cta h3{color:#ffffff !important;margin:0 0 10px 0;}\n.df-cta p{color:#e2e8f0 !important;margin:0;font-size:0.97em;}\n.df-cta a{color:#a5f3fc !important;}\n\u003c\/style\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n\u003cspan class=\"df-eyebrow\"\u003eProline X | Performance Down Fire\u003c\/span\u003e\n\u003ch2\u003eFive and a Half Inches Tall. Firing Into the Floor.\u003c\/h2\u003e\n\u003cp\u003eA shallow sealed enclosure for a single 10 inch subwoofer, built to disappear under a cargo cover or behind a seat back. The driver faces down, the top of the cabinet stays flat and usable, and the whole thing stands 7.25 inches tall with the feet installed.\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003e0.60 CU FT NET\u003c\/span\u003e\n\u003cspan class=\"df-badge\"\u003e5.5 IN CABINET\u003c\/span\u003e\n\u003cspan class=\"df-badge\"\u003e4.75 IN MAX DEPTH\u003c\/span\u003e\n\u003cspan class=\"df-badge\"\u003eDOWN FIRE OR FORWARD FIRE\u003c\/span\u003e\n\u003cspan class=\"df-badge\"\u003eFEET INCLUDED\u003c\/span\u003e\n\u003cspan class=\"df-badge\"\u003eBUILT IN TULLAHOMA, TN\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-warn\"\u003e\n\u003cspan class=\"df-warn-label\"\u003eRead This First\u003c\/span\u003e\n\u003ch3\u003eThis Is a Shallow Mount Enclosure\u003c\/h3\u003e\n\u003cp\u003eMaximum driver mounting depth is \u003cstrong\u003e4.75 inches\u003c\/strong\u003e. That is the number that decides whether this enclosure works for you, and it rules out the majority of conventional 10 inch subwoofers, which typically need somewhere between 5.5 and 7 inches.\u003c\/p\u003e\n\u003cp\u003eThis box is built for \u003cstrong\u003eshallow mount and slim profile 10s\u003c\/strong\u003e. Check your driver's published mounting depth against 4.75 inches before you order. If your driver needs more than that, our forward fire P10-S allows 6.25 inches and is the better choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around a Constraint, Not Around a Driver\u003c\/h3\u003e\n\u003cp\u003ePerformance Down Fire enclosures are sized by driver diameter rather than cut for one specific subwoofer. This one takes any 10 inch driver with a \u003cstrong\u003e9.25 inch cutout\u003c\/strong\u003e and a mounting depth of 4.75 inches or less, and gives it \u003cstrong\u003e0.60 cubic feet of net airspace\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe design brief was height. At 5.5 inches of cabinet the enclosure fits places a conventional 10 inch box cannot go, and turning the driver toward the floor is what makes that height possible, because the baffle no longer has to face outward into the cargo area.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section-alt\"\u003e\n\u003ch3\u003eWhy Down Fire\u003c\/h3\u003e\n\u003cp\u003eTurning the driver toward the floor is not a styling decision. It changes what the enclosure does to the space around it and what the space around it can do to the enclosure.\u003c\/p\u003e\n\u003cdiv class=\"df-card-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003cspan class=\"df-card-label\"\u003eBoundary\u003c\/span\u003e\u003cdiv class=\"df-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eThe Floor Is Right There\u003c\/h4\u003e\n\u003cp\u003eThe driver radiates into a hard surface 1.75 inches away. In a trunk or cargo area that reinforcement, combined with cabin gain, is what makes a compact sealed box feel bigger than its airspace.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003cspan class=\"df-card-label\"\u003eProtection\u003c\/span\u003e\u003cdiv class=\"df-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eNothing Lands on the Cone\u003c\/h4\u003e\n\u003cp\u003eGroceries, tools, luggage, and dogs never touch a surround that is facing down. The most common cause of a damaged subwoofer in a daily driven vehicle is \u003cstrong\u003ecargo, not power\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003cspan class=\"df-card-label\"\u003ePackaging\u003c\/span\u003e\u003cdiv class=\"df-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eA Flat Top You Can Use\u003c\/h4\u003e\n\u003cp\u003eNo basket, no grille, no protrusion. The top of the cabinet is a flat carpeted surface, which in most vehicles means you get the cargo floor back instead of building around a box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003cspan class=\"df-card-label\"\u003eFlexibility\u003c\/span\u003e\u003cdiv class=\"df-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eNot Locked Into One Orientation\u003c\/h4\u003e\n\u003cp\u003eThe feet ship without predrilled holes on purpose. Mount them where your floor wants them, or leave them off entirely and run the cabinet \u003cstrong\u003eforward firing\u003c\/strong\u003e if your install calls for it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-clearance\"\u003e\n\u003cspan class=\"df-clearance-label\"\u003eFeet and Clearance\u003c\/span\u003e\n\u003ch3\u003eWhat Ships With the Enclosure\u003c\/h3\u003e\n\u003cp\u003eFour feet come standard with every Performance Down Fire enclosure. There is no upgrade tier and no separate accessory to buy.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eABS and carbon fiber composite\u003c\/strong\u003e, machined in house on the same equipment as our terminal cups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.75 inches of lift\u003c\/strong\u003e, which sets the working air gap between the baffle and the floor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo predrilled mounting holes\u003c\/strong\u003e, so the enclosure is never locked into a single orientation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall height with feet installed: 7.25 inches.\u003c\/strong\u003e Cabinet alone is 5.5 inches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"df-alert\"\u003e\u003cp\u003e\u003cstrong\u003eKeep the gap clear.\u003c\/strong\u003e The 1.75 inch space under the baffle is the air path, not empty room. A spare tire, a toolbox, or a folded moving blanket pressed against the opening will choke the output. Down fire systems that sound dead almost always have something jammed underneath them.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section-alt\"\u003e\n\u003ch3\u003eHow It Is Built\u003c\/h3\u003e\n\u003cdiv class=\"df-highlight\"\u003e\n\u003ch3\u003eCabinet\u003c\/h3\u003e\n\u003cp\u003eCut on our ShopSabre CNC from Langboard Elite MDF and assembled with V groove and dado joinery, with internal bracing and a single 0.75 inch baffle. Every panel meets on a machined joint rather than a butt seam, so the cabinet stays rigid and puts its energy into the driver instead of the panels.\u003c\/p\u003e\n\u003ch3\u003eMounting Hardware\u003c\/h3\u003e\n\u003cp\u003eThis is a generic enclosure sized by driver diameter, which means we do not know which subwoofer is going into it and cannot machine a bolt pattern for it. \u003cstrong\u003eThe baffle ships as a solid mounting flange and you drill your own mounting holes to match your driver.\u003c\/strong\u003e Threaded inserts are a feature of our Performance Optimized line, where the enclosure is cut for one named subwoofer and the bolt circle is drawn in CAD from the actual driver.\u003c\/p\u003e\n\u003cp\u003eThe MDF we use is dense. \u003cstrong\u003ePredrill your mounting holes.\u003c\/strong\u003e Driving screws straight into it without a pilot hole will split the baffle or strip the screw.\u003c\/p\u003e\n\u003ch3\u003eWiring and Damping\u003c\/h3\u003e\n\u003cp\u003eThe Proline X ABS and carbon fiber composite terminal cup is \u003cstrong\u003eside mounted\u003c\/strong\u003e, which keeps the connection accessible with the enclosure sitting on its feet. Pre wired with 12 gauge OFC. Polyfill is installed before the enclosure leaves the shop.\u003c\/p\u003e\n\u003ch3\u003eFinish\u003c\/h3\u003e\n\u003cp\u003eDark gray trunk liner standard, plush black available. The lasered acrylic badge mounts on the front face rather than the woofer face, so it stays visible in the down fire orientation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eThe cabinet measures \u003cstrong\u003e24.5 inches wide by 13.5 inches deep by 5.5 inches tall\u003c\/strong\u003e, or 7.25 inches tall with the feet installed and the enclosure sitting in the down fire position.\u003c\/p\u003e\n\u003cdiv class=\"df-alert\"\u003e\u003cp\u003e\u003cstrong\u003eTwo numbers decide this purchase.\u003c\/strong\u003e Driver mounting depth against 4.75 inches, and cabinet height against the space you have. Width and depth are generous because the height had to come from somewhere. Measure the footprint before you order.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eEnclosure Performance\u003c\/h3\u003e\n\u003cp\u003eThis enclosure is sized by driver diameter rather than cut for one subwoofer, so there is no single response curve for it. What the alignment does depends entirely on the driver you put in, and specifically on its total Q.\u003c\/p\u003e\n\u003cp\u003eThe table below models three driver profiles across the range you find in shallow mount 10s, calculated in 0.60 cubic feet. \u003cstrong\u003eThese are illustrative profiles, not published specifications for any particular subwoofer.\u003c\/strong\u003e Use them to understand the shape of the outcome, then run your own driver's real numbers.\u003c\/p\u003e\n\u003ctable class=\"df-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eDriver Profile (modeled)\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003cth\u003eResult\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Q, Qts 0.40\u003cbr\u003e\u003cspan style=\"color:#94a3b8 !important;font-weight:400;font-size:0.9em;\"\u003eFs 32 Hz, Vas 0.70 cu ft\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.589\u003c\/td\u003e\n\u003ctd\u003e47.1 Hz\u003c\/td\u003e\n\u003ctd\u003e58.4 Hz\u003c\/td\u003e\n\u003ctd\u003eOverdamped. Rolls off early, thin on the bottom.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\n\u003cstrong style=\"color:#86efac !important;\"\u003eMid Q, Qts 0.50\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color:#86efac !important;font-weight:400;font-size:0.9em;\"\u003eFs 30 Hz, Vas 0.85 cu ft\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e0.777\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e46.6 Hz\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e42.8 Hz\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003eNear textbook. The target for this box.\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh Q, Qts 0.65\u003cbr\u003e\u003cspan style=\"color:#94a3b8 !important;font-weight:400;font-size:0.9em;\"\u003eFs 28 Hz, Vas 1.00 cu ft\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.061\u003c\/td\u003e\n\u003ctd\u003e45.7 Hz\u003c\/td\u003e\n\u003ctd\u003e35.1 Hz\u003c\/td\u003e\n\u003ctd\u003eImpact alignment. Lift around 45 Hz, extends lower.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv class=\"df-chartbox\"\u003e\n\u003csvg class=\"df-chart\" width=\"1260\" height=\"420\" viewbox=\"0 0 1260 420\" preserveaspectratio=\"xMidYMid meet\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display:block !important;width:100% !important;max-width:100% !important;height:auto !important;\"\u003e\n\u003crect x=\"0\" y=\"0\" width=\"1260\" height=\"420\" fill=\"#0b1424\"\u003e\u003c\/rect\u003e\n\u003crect x=\"90\" y=\"50\" width=\"1080\" height=\"300\" fill=\"#111c30\" stroke=\"#2c405c\" stroke-width=\"1\"\u003e\u003c\/rect\u003e\n\u003cline x1=\"280\" y1=\"50\" x2=\"280\" y2=\"350\" stroke=\"#22384f\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003cline x1=\"520\" y1=\"50\" x2=\"520\" y2=\"350\" stroke=\"#22384f\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003cline x1=\"845\" y1=\"50\" x2=\"845\" y2=\"350\" stroke=\"#22384f\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003cline x1=\"90\" y1=\"110\" x2=\"1170\" y2=\"110\" stroke=\"#334155\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003cline x1=\"90\" y1=\"155\" x2=\"1170\" y2=\"155\" stroke=\"#64748b\" stroke-width=\"1\" stroke-dasharray=\"6,5\"\u003e\u003c\/line\u003e\n\u003ctext x=\"1178\" y=\"160\" font-size=\"15\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e-3 dB\u003c\/text\u003e\n\u003ctext x=\"1178\" y=\"115\" font-size=\"15\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e0 dB\u003c\/text\u003e\n\u003cpolyline points=\"90,345 112,333 135,322 158,311 180,300 202,290 225,279 247,269 270,259 292,250 315,240 337,231 360,223 382,214 405,206 428,198 450,191 472,184 495,178 518,172 540,167 562,161 585,157 608,152 630,148 652,145 675,141 698,138 720,135 742,133 765,131 787,129 810,127 832,125 855,124 877,122 900,121 923,120 945,119 968,118 990,117 1012,117 1035,116 1058,115 1080,115 1102,114 1125,114 1147,114 1170,113\" fill=\"none\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/polyline\u003e\n\u003cpolyline points=\"90,313 112,299 135,285 158,272 180,258 202,244 225,230 247,217 270,203 292,190 315,177 337,164 360,151 382,140 405,129 428,119 450,111 472,104 495,98 518,93 540,90 562,88 585,86 608,86 630,86 652,87 675,87 698,88 720,90 742,91 765,92 787,93 810,95 832,96 855,97 877,98 900,99 923,100 945,101 968,102 990,102 1012,103 1035,104 1058,104 1080,105 1102,105 1125,106 1147,106 1170,106\" fill=\"none\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/polyline\u003e\n\u003cpolyline points=\"90,328 112,316 135,304 158,291 180,279 202,267 225,255 247,243 270,232 292,221 315,210 337,199 360,189 382,179 405,170 428,162 450,154 472,147 495,141 518,135 540,130 562,126 585,122 608,119 630,117 652,115 675,113 698,112 720,111 742,110 765,109 787,109 810,108 832,108 855,108 877,108 900,108 923,108 945,108 968,108 990,108 1012,108 1035,108 1058,109 1080,109 1102,109 1125,109 1147,109 1170,109\" fill=\"none\" stroke=\"#22d3ee\" stroke-width=\"4.5\"\u003e\u003c\/polyline\u003e\n\u003ctext x=\"82\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e20\u003c\/text\u003e\n\u003ctext x=\"272\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e30\u003c\/text\u003e\n\u003ctext x=\"512\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e50\u003c\/text\u003e\n\u003ctext x=\"833\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e100\u003c\/text\u003e\n\u003ctext x=\"1158\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e200\u003c\/text\u003e\n\u003ctext x=\"560\" y=\"404\" font-size=\"17\" fill=\"#22d3ee\" font-family=\"sans-serif\" font-weight=\"700\"\u003eFrequency (Hz)\u003c\/text\u003e\n\u003ctext x=\"48\" y=\"56\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e+4\u003c\/text\u003e\n\u003ctext x=\"58\" y=\"190\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e-5\u003c\/text\u003e\n\u003ctext x=\"48\" y=\"265\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e-10\u003c\/text\u003e\n\u003ctext x=\"48\" y=\"340\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e-15\u003c\/text\u003e\n\u003ctext x=\"102\" y=\"36\" font-size=\"16\" fill=\"#67e8f9\" font-family=\"sans-serif\" font-weight=\"700\"\u003eModeled in 0.60 cu ft. Anechoic half-space, no cabin gain.\u003c\/text\u003e\n\u003cline x1=\"820\" y1=\"270\" x2=\"870\" y2=\"270\" stroke=\"#22d3ee\" stroke-width=\"4.5\"\u003e\u003c\/line\u003e\n\u003ctext x=\"882\" y=\"276\" font-size=\"16\" fill=\"#e2e8f0\" font-family=\"sans-serif\" font-weight=\"700\"\u003eMid Q, Qts 0.50\u003c\/text\u003e\n\u003cline x1=\"820\" y1=\"302\" x2=\"870\" y2=\"302\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/line\u003e\n\u003ctext x=\"882\" y=\"308\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003eLow Q 0.40 and High Q 0.65\u003c\/text\u003e\n\u003c\/svg\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-alert\"\u003e\u003cp\u003e\u003cstrong\u003eWhat the numbers are telling you.\u003c\/strong\u003e A 0.60 cubic foot sealed box wants a driver in the middle of the Q range. Drop in a low Q driver and you get an overdamped alignment that gives up real low end. Drop in a high Q driver and you get a lift in the upper bass with deeper extension, which is a legitimate choice if impact is what you want. There is no wrong answer here, but there is a wrong assumption, which is that any 10 will behave the same way in this box.\u003c\/p\u003e\u003c\/div\u003e\n\n\u003ch4\u003eAbout the Polyfill\u003c\/h4\u003e\n\u003cp\u003eThe 0.60 cubic foot figure is \u003cstrong\u003ephysical net airspace\u003c\/strong\u003e, measured after subtracting bracing and typical driver displacement. It is the number to enter into a modeling program. Polyfill is installed at the correct density before the enclosure ships, which typically makes a sealed box behave as though it were roughly 10 to 15 percent larger. We quote the physical volume rather than the effective one, so the number you see is the number you can verify.\u003c\/p\u003e\n\u003cp\u003eRun your own driver's parameters through the \u003ca href=\"\/pages\/sealed-box-calculator\"\u003eSealed Box Calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n\u003cp\u003eFull dimensions, cutout, mounting depth, and hardware details are listed under the \u003cstrong\u003eEnclosures\u003c\/strong\u003e tab.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eShallow, Down Firing, Built in Tennessee.\u003c\/h3\u003e\n\u003cp\u003eEvery Performance Down Fire enclosure is built to order in Tullahoma, Tennessee on our own CNC equipment. Questions on driver depth or whether your subwoofer suits this alignment, call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":44465466966105,"sku":"P10-S DF G","price":169.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":44465466998873,"sku":"P10-S DF B","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/P10-SDF.png?v=1785896062"},{"product_id":"proline-x-p12-s-df-single-12-sealed-down-fire-subwoofer-enclosure","title":"Proline X P12-S DF | Single 12\" Sealed Down Fire Subwoofer Enclosure","description":"\u003cdiv class=\"df-wrap\"\u003e\n\u003cstyle\u003e\n.df-wrap{font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Helvetica,Arial,sans-serif;line-height:1.7;color:#cbd5e1 !important;}\n.df-wrap p{color:#cbd5e1 !important;margin:0 0 14px 0;}\n.df-wrap ul{margin:0 0 16px 0;padding-left:20px;}\n.df-wrap li{color:#cbd5e1 !important;margin-bottom:8px;}\n.df-wrap strong{color:#67e8f9 !important;}\n.df-wrap a{color:#22d3ee !important;font-weight:700;text-decoration:underline;}\n.df-hero{background:linear-gradient(135deg,#0f172a 0%,#0e7490 100%) !important;border-radius:8px;padding:32px 28px;margin-bottom:28px;}\n.df-eyebrow{display:inline-block;color:#67e8f9 !important;font-size:0.72em;font-weight:700;letter-spacing:0.14em;text-transform:uppercase;margin-bottom:10px;}\n.df-hero h2{color:#ffffff !important;font-size:1.55em;font-weight:700;margin:0 0 12px 0;line-height:1.3;}\n.df-hero p{color:#e2e8f0 !important;font-size:1.02em;margin:0;}\n.df-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}\n.df-badge{display:inline-block;background:rgba(6,182,212,0.18) !important;border:1px solid #06b6d4 !important;color:#a5f3fc !important;font-size:0.75em;font-weight:600;letter-spacing:0.04em;padding:5px 12px;border-radius:4px;}\n.df-section{margin:30px 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h3{margin-top:0;}\n.df-card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:24px 0;}\n@media(max-width:600px){.df-card-grid{grid-template-columns:1fr;}}\n.df-card{background:#1a2740 !important;border:1px solid #2c405c !important;border-top:3px solid #06b6d4 !important;border-radius:6px;padding:22px;}\n.df-card-label{display:inline-block;background:#06b6d4 !important;color:#04222b !important;font-size:0.68em;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;padding:3px 10px;border-radius:3px;margin-bottom:10px;}\n.df-card h4{margin:0 0 10px 0;}\n.df-card-divider{height:2px;background:#06b6d4 !important;width:32px;margin-bottom:12px;border-radius:2px;}\n.df-card p{font-size:0.93em;color:#b6c4d6 !important;margin:0;line-height:1.65;}\n.df-card p strong{color:#67e8f9 !important;}\n.df-table{width:100% !important;border-collapse:collapse;margin:22px 0;font-size:0.94em;}\n.df-table th{background:#0e7490 !important;color:#ffffff !important;text-align:left;padding:11px 14px;font-weight:700;font-size:0.9em;letter-spacing:0.04em;text-transform:uppercase;border-bottom:1px solid #22384f !important;}\n.df-table td{padding:10px 14px;border-bottom:1px solid #22384f !important;color:#dbe4ef !important;background:#111c30 !important;}\n.df-table tr:nth-child(even) td{background:#1a2740 !important;}\n.df-table td:first-child{font-weight:600;color:#67e8f9 !important;width:34%;}\n.df-chartbox{display:block !important;width:100% !important;max-width:100% !important;margin:22px 0 !important;}\n.df-chart{display:block !important;width:100% !important;max-width:100% !important;height:auto !important;}\n.df-cta{background:linear-gradient(135deg,#0f172a 0%,#0e7490 100%) !important;border-radius:8px;padding:28px 26px;margin:32px 0 0 0;text-align:center;}\n.df-cta h3{color:#ffffff !important;margin:0 0 10px 0;}\n.df-cta p{color:#e2e8f0 !important;margin:0;font-size:0.97em;}\n.df-cta a{color:#a5f3fc !important;}\n\u003c\/style\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n\u003cspan class=\"df-eyebrow\"\u003eProline X | Performance Down Fire\u003c\/span\u003e\n\u003ch2\u003eA Full Cubic Foot for a 12, Under Seven Inches Tall.\u003c\/h2\u003e\n\u003cp\u003eA shallow sealed enclosure for a single 12 inch subwoofer. The driver faces down, the top of the cabinet stays flat and usable, and the whole thing stands 8.5 inches tall with the feet installed. Most 12 inch boxes that hold this much air are twice this height.\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003e1.00 CU FT NET\u003c\/span\u003e\n\u003cspan class=\"df-badge\"\u003e6.75 IN CABINET\u003c\/span\u003e\n\u003cspan class=\"df-badge\"\u003e6 IN MAX DEPTH\u003c\/span\u003e\n\u003cspan class=\"df-badge\"\u003eDOWN FIRE OR FORWARD FIRE\u003c\/span\u003e\n\u003cspan class=\"df-badge\"\u003eFEET INCLUDED\u003c\/span\u003e\n\u003cspan class=\"df-badge\"\u003eBUILT IN TULLAHOMA, TN\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-warn\"\u003e\n\u003cspan class=\"df-warn-label\"\u003eRead This First\u003c\/span\u003e\n\u003ch3\u003eCheck Your Driver Depth\u003c\/h3\u003e\n\u003cp\u003eMaximum driver mounting depth is \u003cstrong\u003e6 inches\u003c\/strong\u003e. That is workable for a good number of 12s, but plenty of high excursion 12 inch drivers need 7 inches or more, and those will not fit.\u003c\/p\u003e\n\u003cp\u003eCheck your driver's published mounting depth against 6 inches before you order. If it needs more, our forward fire P12-S is the better choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around a Constraint, Not Around a Driver\u003c\/h3\u003e\n\u003cp\u003ePerformance Down Fire enclosures are sized by driver diameter rather than cut for one specific subwoofer. This one takes any 12 inch driver with an \u003cstrong\u003e11.13 inch cutout\u003c\/strong\u003e and a mounting depth of 6 inches or less, and gives it \u003cstrong\u003e1.00 cubic foot of net airspace\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe design brief was height. Getting a full cubic foot into a 6.75 inch cabinet means the footprint has to grow, which is why this enclosure is 29.5 inches wide. Turning the driver toward the floor is what makes the height possible, because the baffle no longer has to face outward into the cargo area.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section-alt\"\u003e\n\u003ch3\u003eWhy Down Fire\u003c\/h3\u003e\n\u003cp\u003eTurning the driver toward the floor is not a styling decision. It changes what the enclosure does to the space around it and what the space around it can do to the enclosure.\u003c\/p\u003e\n\u003cdiv class=\"df-card-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003cspan class=\"df-card-label\"\u003eBoundary\u003c\/span\u003e\u003cdiv class=\"df-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eThe Floor Is Right There\u003c\/h4\u003e\n\u003cp\u003eThe driver radiates into a hard surface 1.75 inches away. In a trunk or cargo area that reinforcement, combined with cabin gain, is what makes a compact sealed box feel bigger than its airspace.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003cspan class=\"df-card-label\"\u003eProtection\u003c\/span\u003e\u003cdiv class=\"df-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eNothing Lands on the Cone\u003c\/h4\u003e\n\u003cp\u003eGroceries, tools, luggage, and dogs never touch a surround that is facing down. The most common cause of a damaged subwoofer in a daily driven vehicle is \u003cstrong\u003ecargo, not power\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003cspan class=\"df-card-label\"\u003ePackaging\u003c\/span\u003e\u003cdiv class=\"df-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eA Flat Top You Can Use\u003c\/h4\u003e\n\u003cp\u003eNo basket, no grille, no protrusion. The top of the cabinet is a flat carpeted surface, which in most vehicles means you get the cargo floor back instead of building around a box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003cspan class=\"df-card-label\"\u003eFlexibility\u003c\/span\u003e\u003cdiv class=\"df-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eNot Locked Into One Orientation\u003c\/h4\u003e\n\u003cp\u003eThe feet ship without predrilled holes on purpose. Mount them where your floor wants them, or leave them off entirely and run the cabinet \u003cstrong\u003eforward firing\u003c\/strong\u003e if your install calls for it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-clearance\"\u003e\n\u003cspan class=\"df-clearance-label\"\u003eFeet and Clearance\u003c\/span\u003e\n\u003ch3\u003eWhat Ships With the Enclosure\u003c\/h3\u003e\n\u003cp\u003eFour feet come standard with every Performance Down Fire enclosure. There is no upgrade tier and no separate accessory to buy.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eABS and carbon fiber composite\u003c\/strong\u003e, machined in house on the same equipment as our terminal cups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.75 inches of lift\u003c\/strong\u003e, which sets the working air gap between the baffle and the floor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo predrilled mounting holes\u003c\/strong\u003e, so the enclosure is never locked into a single orientation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall height with feet installed: 8.5 inches.\u003c\/strong\u003e Cabinet alone is 6.75 inches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"df-alert\"\u003e\u003cp\u003e\u003cstrong\u003eKeep the gap clear.\u003c\/strong\u003e The 1.75 inch space under the baffle is the air path, not empty room. A spare tire, a toolbox, or a folded moving blanket pressed against the opening will choke the output. Down fire systems that sound dead almost always have something jammed underneath them.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section-alt\"\u003e\n\u003ch3\u003eHow It Is Built\u003c\/h3\u003e\n\u003cdiv class=\"df-highlight\"\u003e\n\u003ch3\u003eCabinet\u003c\/h3\u003e\n\u003cp\u003eCut on our ShopSabre CNC from Langboard Elite MDF and assembled with V groove and dado joinery, with internal bracing and a single 0.75 inch baffle. Every panel meets on a machined joint rather than a butt seam, so the cabinet stays rigid and puts its energy into the driver instead of the panels.\u003c\/p\u003e\n\u003ch3\u003eMounting Hardware\u003c\/h3\u003e\n\u003cp\u003eThis is a generic enclosure sized by driver diameter, which means we do not know which subwoofer is going into it and cannot machine a bolt pattern for it. \u003cstrong\u003eThe baffle ships as a solid mounting flange and you drill your own mounting holes to match your driver.\u003c\/strong\u003e Threaded inserts are a feature of our Performance Optimized line, where the enclosure is cut for one named subwoofer and the bolt circle is drawn in CAD from the actual driver.\u003c\/p\u003e\n\u003cp\u003eThe MDF we use is dense. \u003cstrong\u003ePredrill your mounting holes.\u003c\/strong\u003e Driving screws straight into it without a pilot hole will split the baffle or strip the screw.\u003c\/p\u003e\n\u003ch3\u003eWiring and Damping\u003c\/h3\u003e\n\u003cp\u003eThe Proline X ABS and carbon fiber composite terminal cup is \u003cstrong\u003eside mounted\u003c\/strong\u003e, which keeps the connection accessible with the enclosure sitting on its feet. Pre wired with 12 gauge OFC. Polyfill is installed before the enclosure leaves the shop.\u003c\/p\u003e\n\u003ch3\u003eFinish\u003c\/h3\u003e\n\u003cp\u003eDark gray trunk liner standard, plush black available. The lasered acrylic badge mounts on the front face rather than the woofer face, so it stays visible in the down fire orientation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eThe cabinet measures \u003cstrong\u003e29.5 inches wide by 14.5 inches deep by 6.75 inches tall\u003c\/strong\u003e, or 8.5 inches tall with the feet installed and the enclosure sitting in the down fire position.\u003c\/p\u003e\n\u003cdiv class=\"df-alert\"\u003e\u003cp\u003e\u003cstrong\u003eMeasure the width first.\u003c\/strong\u003e At 29.5 inches this is a full width enclosure, and that width is the price of getting a full cubic foot into a cabinet under 7 inches tall. Height is the spec that makes this design interesting, but width is the spec that decides whether it goes in your vehicle.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eEnclosure Performance\u003c\/h3\u003e\n\u003cp\u003eThis enclosure is sized by driver diameter rather than cut for one subwoofer, so there is no single response curve for it. What the alignment does depends entirely on the driver you put in, and specifically on its total Q.\u003c\/p\u003e\n\u003cp\u003eThe table below models three driver profiles across the range you find in 12 inch subwoofers, calculated in 1.00 cubic foot. \u003cstrong\u003eThese are illustrative profiles, not published specifications for any particular subwoofer.\u003c\/strong\u003e Use them to understand the shape of the outcome, then run your own driver's real numbers.\u003c\/p\u003e\n\u003ctable class=\"df-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eDriver Profile (modeled)\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003cth\u003eResult\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Q, Qts 0.40\u003cbr\u003e\u003cspan style=\"color:#94a3b8 !important;font-weight:400;font-size:0.9em;\"\u003eFs 30 Hz, Vas 1.30 cu ft\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.607\u003c\/td\u003e\n\u003ctd\u003e45.5 Hz\u003c\/td\u003e\n\u003ctd\u003e54.2 Hz\u003c\/td\u003e\n\u003ctd\u003eOverdamped. Rolls off early, thin on the bottom.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\n\u003cstrong style=\"color:#86efac !important;\"\u003eMid Q, Qts 0.50\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color:#86efac !important;font-weight:400;font-size:0.9em;\"\u003eFs 28 Hz, Vas 1.55 cu ft\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e0.798\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e44.7 Hz\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e40.2 Hz\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003eNear textbook. The target for this box.\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh Q, Qts 0.65\u003cbr\u003e\u003cspan style=\"color:#94a3b8 !important;font-weight:400;font-size:0.9em;\"\u003eFs 26 Hz, Vas 1.80 cu ft\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.088\u003c\/td\u003e\n\u003ctd\u003e43.5 Hz\u003c\/td\u003e\n\u003ctd\u003e33.1 Hz\u003c\/td\u003e\n\u003ctd\u003eImpact alignment. Lift around 43 Hz, extends lower.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv class=\"df-chartbox\"\u003e\n\u003csvg class=\"df-chart\" width=\"1260\" height=\"420\" viewbox=\"0 0 1260 420\" preserveaspectratio=\"xMidYMid meet\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display:block !important;width:100% !important;max-width:100% !important;height:auto !important;\"\u003e\n\u003crect x=\"0\" y=\"0\" width=\"1260\" height=\"420\" fill=\"#0b1424\"\u003e\u003c\/rect\u003e\n\u003crect x=\"90\" y=\"50\" width=\"1080\" height=\"300\" fill=\"#111c30\" stroke=\"#2c405c\" stroke-width=\"1\"\u003e\u003c\/rect\u003e\n\u003cline x1=\"280\" y1=\"50\" x2=\"280\" y2=\"350\" stroke=\"#22384f\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003cline x1=\"520\" y1=\"50\" x2=\"520\" y2=\"350\" stroke=\"#22384f\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003cline x1=\"845\" y1=\"50\" x2=\"845\" y2=\"350\" stroke=\"#22384f\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003cline x1=\"90\" y1=\"110\" x2=\"1170\" y2=\"110\" stroke=\"#334155\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003cline x1=\"90\" y1=\"155\" x2=\"1170\" y2=\"155\" stroke=\"#64748b\" stroke-width=\"1\" stroke-dasharray=\"6,5\"\u003e\u003c\/line\u003e\n\u003ctext x=\"1178\" y=\"160\" font-size=\"15\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e-3 dB\u003c\/text\u003e\n\u003ctext x=\"1178\" y=\"115\" font-size=\"15\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e0 dB\u003c\/text\u003e\n\u003cpolyline points=\"90,335 112,323 135,312 158,301 180,290 202,280 225,269 247,259 270,249 292,240 315,230 337,221 360,213 382,205 405,197 428,189 450,182 472,176 495,170 518,164 540,159 562,154 585,150 608,146 630,142 652,139 675,136 698,133 720,131 742,129 765,127 787,125 810,123 832,122 855,121 877,120 900,119 923,118 945,117 968,116 990,116 1012,115 1035,115 1058,114 1080,114 1102,113 1125,113 1147,113 1170,113\" fill=\"none\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/polyline\u003e\n\u003cpolyline points=\"90,298 112,284 135,270 158,257 180,243 202,229 225,215 247,201 270,187 292,174 315,161 337,149 360,137 382,126 405,116 428,108 450,100 472,94 495,90 518,87 540,85 562,84 585,84 608,84 630,85 652,86 675,87 698,88 720,90 742,91 765,92 787,94 810,95 832,96 855,97 877,98 900,99 923,100 945,101 968,102 990,103 1012,103 1035,104 1058,104 1080,105 1102,105 1125,106 1147,106 1170,106\" fill=\"none\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/polyline\u003e\n\u003cpolyline points=\"90,317 112,304 135,292 158,279 180,267 202,255 225,243 247,231 270,220 292,208 315,198 337,187 360,177 382,168 405,160 428,152 450,144 472,138 495,132 518,127 540,123 562,120 585,117 608,114 630,112 652,111 675,110 698,109 720,108 742,108 765,107 787,107 810,107 832,107 855,107 877,107 900,107 923,107 945,107 968,108 990,108 1012,108 1035,108 1058,108 1080,108 1102,108 1125,109 1147,109 1170,109\" fill=\"none\" stroke=\"#22d3ee\" stroke-width=\"4.5\"\u003e\u003c\/polyline\u003e\n\u003ctext x=\"82\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e20\u003c\/text\u003e\n\u003ctext x=\"272\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e30\u003c\/text\u003e\n\u003ctext x=\"512\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e50\u003c\/text\u003e\n\u003ctext x=\"833\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e100\u003c\/text\u003e\n\u003ctext x=\"1158\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e200\u003c\/text\u003e\n\u003ctext x=\"560\" y=\"404\" font-size=\"17\" fill=\"#22d3ee\" font-family=\"sans-serif\" font-weight=\"700\"\u003eFrequency (Hz)\u003c\/text\u003e\n\u003ctext x=\"48\" y=\"56\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e+4\u003c\/text\u003e\n\u003ctext x=\"58\" y=\"190\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e-5\u003c\/text\u003e\n\u003ctext x=\"48\" y=\"265\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e-10\u003c\/text\u003e\n\u003ctext x=\"48\" y=\"340\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e-15\u003c\/text\u003e\n\u003ctext x=\"102\" y=\"36\" font-size=\"16\" fill=\"#67e8f9\" font-family=\"sans-serif\" font-weight=\"700\"\u003eModeled in 1.00 cu ft. Anechoic half-space, no cabin gain.\u003c\/text\u003e\n\u003cline x1=\"820\" y1=\"270\" x2=\"870\" y2=\"270\" stroke=\"#22d3ee\" stroke-width=\"4.5\"\u003e\u003c\/line\u003e\n\u003ctext x=\"882\" y=\"276\" font-size=\"16\" fill=\"#e2e8f0\" font-family=\"sans-serif\" font-weight=\"700\"\u003eMid Q, Qts 0.50\u003c\/text\u003e\n\u003cline x1=\"820\" y1=\"302\" x2=\"870\" y2=\"302\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/line\u003e\n\u003ctext x=\"882\" y=\"308\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003eLow Q 0.40 and High Q 0.65\u003c\/text\u003e\n\u003c\/svg\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-alert\"\u003e\u003cp\u003e\u003cstrong\u003eWhat the numbers are telling you.\u003c\/strong\u003e A 1.00 cubic foot sealed box wants a 12 in the middle of the Q range. Drop in a low Q driver and you get an overdamped alignment that gives up real low end. Drop in a high Q driver and you get a lift in the upper bass with deeper extension, which is a legitimate choice if impact is what you want. There is no wrong answer here, but there is a wrong assumption, which is that any 12 will behave the same way in this box.\u003c\/p\u003e\u003c\/div\u003e\n\n\u003ch4\u003eAbout the Polyfill\u003c\/h4\u003e\n\u003cp\u003eThe 1.00 cubic foot figure is \u003cstrong\u003ephysical net airspace\u003c\/strong\u003e, measured after subtracting bracing and typical driver displacement. It is the number to enter into a modeling program. Polyfill is installed at the correct density before the enclosure ships, which typically makes a sealed box behave as though it were roughly 10 to 15 percent larger, so this cabinet tends to act like 1.10 to 1.15 cubic feet in practice. We quote the physical volume rather than the effective one, so the number you see is the number you can verify.\u003c\/p\u003e\n\u003cp\u003eRun your own driver's parameters through the \u003ca href=\"\/pages\/sealed-box-calculator\"\u003eSealed Box Calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n\u003cp\u003eFull dimensions, cutout, mounting depth, and hardware details are listed under the \u003cstrong\u003eEnclosures\u003c\/strong\u003e tab.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eShallow, Down Firing, Built in Tennessee.\u003c\/h3\u003e\n\u003cp\u003eEvery Performance Down Fire enclosure is built to order in Tullahoma, Tennessee on our own CNC equipment. Questions on driver depth or whether your subwoofer suits this alignment, call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":44465486233689,"sku":"P12-S DF G","price":179.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":44465486266457,"sku":"P12-S DF B","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/P12-SDF.png?v=1785896216"},{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-prodigy-nb3-10","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Prodigy NB3-10","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Prodigy NB3-10D4\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.76 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eShallow Mount Fit\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.76\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.526\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e68.1 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e6.25 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Prodigy NB3-10D4's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Prodigy NB3-10\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the NB3-10's \u003cstrong\u003e9.125 inch cutout\u003c\/strong\u003e, and the cabinet stands \u003cstrong\u003e6.25 inches tall\u003c\/strong\u003e because the driver asks for only \u003cstrong\u003e3.00 inches of mounting depth\u003c\/strong\u003e. The NB3 Series exists to solve a depth problem, and this enclosure extends the same logic to the box: it slides into spaces that will not accept a conventional cabinet.\u003c\/p\u003e\n\u003cp\u003eThe NB3-10D4 is a \u003cstrong\u003e600 watt RMS dual 4 ohm\u003c\/strong\u003e driver with 11mm of one way Xmax at 70 percent BL. The motor is a 70 ounce ferrite magnet with a 2.5 inch four layer copper voice coil on a black aluminum former, and an FEA designed center pole vent pulls heat out of the gap. Cone is treated paper on a rubber surround in a stamped steel frame, with a Nomex and cotton blend spider and flat stitched tinsel leads.\u003c\/p\u003e\n\u003cp\u003eFor a shallow driver that is a lot of motor. Moving mass is 151.63 grams against a BL of 23.365, which tells you Prodigy built this to control the cone rather than only to fit under a seat.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eGross internal volume is \u003cstrong\u003e0.86 cubic feet\u003c\/strong\u003e. After the driver's published \u003cstrong\u003e0.10 cubic feet of displacement\u003c\/strong\u003e, the as built figure is \u003cstrong\u003e0.76 cubic feet net\u003c\/strong\u003e. That volume was selected against the driver's published Thiele-Small data, not a generic 10 inch rule of thumb.\u003c\/p\u003e\n\u003cp\u003eThe NB3-10 carries a small \u003cstrong\u003e14.43 liter Vas\u003c\/strong\u003e against a \u003cstrong\u003e36.4 Hz Fs\u003c\/strong\u003e. That is a stiff suspension, and it makes sealed alignment an inherently low Qtc proposition on this driver no matter what volume you build. At 0.76 net the system lands at \u003cstrong\u003eQtc 0.526, Fc 47.1 Hz, and a predicted anechoic F3 of 68.1 Hz\u003c\/strong\u003e. That is deliberately on the overdamped side, and it is the correct choice here: shrinking the box to chase a textbook 0.707 alignment would take roughly 0.25 cubic feet net and would raise Fc by 17 Hz to buy back only 5 Hz of extension. The larger cabinet gives the gentler rolloff slope, the tighter impulse response, and the lowest corner frequency this driver will reach in a sealed box.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eAnechoic Numbers, Cabin Reality\u003c\/h3\u003e\n\u003cp\u003eAnechoic F3 is not what you hear in a vehicle. The 68.1 Hz figure is a free space prediction with no boundaries. A cabin is a small sealed volume that produces rising gain below roughly 60 Hz. A sealed enclosure rolls off at 12 dB per octave, and an overdamped alignment rolls off more gently still, so driver output and cabin gain work against each other in a useful way. In a down fire orientation coupling into the cabin floor, in car response typically extends well below the anechoic number. We publish the anechoic figure because it is the honest measurable spec, not because it is what you will hear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cp\u003eExternal dimensions are \u003cstrong\u003e30 inches wide by 15 inches deep by 6.25 inches tall, measured in the down fire position\u003c\/strong\u003e. Finished weight is 28 pounds. The driver fires down into the floor, so the cabinet couples into the boundary directly beneath it.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance, which counts for more in a cabinet this short.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup, recessed, with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Bracing\u003c\/h4\u003e\n\u003cp\u003eA 6.25 inch cabinet has short panel spans and little room for bracing geometry, so the \u003cstrong\u003eperimeter cross-brace\u003c\/strong\u003e and the double baffle carry the structural load together. Polyfill damping is pre-installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eTarget \u003cstrong\u003e450 to 600 watts RMS\u003c\/strong\u003e at the woofer impedance. Prodigy rates the NB3-10D4 at 600 watts RMS continuous. It is a dual 4 ohm driver, so a single unit wires to 2 ohms or 8 ohms.\u003c\/p\u003e\n\u003cp\u003eThe driver lands on 8\/32 threaded inserts and stainless steel machine screws are included. The enclosure carries a 1 year limited warranty. Bring your own Prodigy NB3-10D4; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eThe volume, the cutout and the cabinet height all come from the NB3-10's own published numbers. Built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540037267545,"sku":"PO 10-S DF NB3","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10-SDFNB3FaceDown.jpg?v=1787369166"},{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-prodigy-nb3-12","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Prodigy NB3-12","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 12px;color:#fff}.df-hero 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Prodigy NB3-12D4\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.02 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e3.0 in Voice Coil\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.02\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.690\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e52.8 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e7.625 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Prodigy NB3-12D4's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Prodigy NB3-12\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the NB3-12's \u003cstrong\u003e10.625 inch cutout\u003c\/strong\u003e, and the internal height is set by the driver's \u003cstrong\u003e3.375 inch mounting depth\u003c\/strong\u003e. The finished cabinet stands 7.625 inches tall, which puts a full 12 inch driver into spaces normally reserved for a 10.\u003c\/p\u003e\n\u003cp\u003eThe NB3-12D4 is an \u003cstrong\u003e800 watt RMS dual 4 ohm\u003c\/strong\u003e driver with 11mm of one way Xmax at 70 percent BL. Prodigy kept the heavy hardware on this one rather than shrinking it to save depth: an 80 ounce ferrite magnet and a \u003cstrong\u003e3.0 inch four layer copper voice coil\u003c\/strong\u003e, where most shallow 12s drop to a 2 or 2.5 inch coil. An FEA designed center pole vent pulls heat out of the gap. Cone is treated paper on a rubber surround in a stamped steel frame, with a Nomex and cotton blend spider and flat stitched tinsel leads.\u003c\/p\u003e\n\u003cp\u003eA BL of 23.96 on a shallow driver is the number worth noticing. It follows directly from the coil Prodigy refused to shrink.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eGross internal volume is \u003cstrong\u003e1.155 cubic feet\u003c\/strong\u003e. After the driver's published \u003cstrong\u003e0.13 cubic feet of displacement\u003c\/strong\u003e, the as built figure is \u003cstrong\u003e1.02 cubic feet net\u003c\/strong\u003e. At that volume the system lands at \u003cstrong\u003eQtc 0.690, Fc 51.5 Hz, and a predicted anechoic F3 of 52.8 Hz\u003c\/strong\u003e, which sits right on the maximally flat shoulder.\u003c\/p\u003e\n\u003cp\u003eThat is where you want a driver carrying a \u003cstrong\u003e29.665 liter Vas\u003c\/strong\u003e against a \u003cstrong\u003e36.2 Hz Fs\u003c\/strong\u003e and a Qts of 0.485. Building larger would push the alignment overdamped and buy very little extension. Building smaller would raise Qtc into punchy territory and lift the corner frequency with it. 1.02 net is the balanced point, and it still fits inside a 7.625 inch down fire profile.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eAnechoic F3 understates in vehicle performance. A cabin produces rising gain below roughly 60 Hz, and a sealed enclosure rolls off at 12 dB per octave, so the two work against each other favorably. Firing down into a floor, in car response typically extends well below the anechoic number. We publish the anechoic figure because it is the honest measurable spec.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eTwelve Inches on a Ten Inch Footprint\u003c\/h3\u003e\n\u003cp\u003eThis cabinet shares the 30 by 15 inch footprint of the 10 inch Down Fire enclosure in the same series and stands \u003cstrong\u003e1.375 inches taller\u003c\/strong\u003e. That 1.375 inches buys a 15.3 Hz lower anechoic F3 and a better alignment: 52.8 Hz at Qtc 0.690 here, against 68.1 Hz at Qtc 0.526 on the 10.\u003c\/p\u003e\n\u003cp\u003eThe difference is the drivers, not the cabinet design. The NB3-12 has a 29.665 liter Vas against the NB3-10's 14.43 liters, which gives it far more room to reach a flat alignment. Unlike the shallow 10, the NB3-12 does not force a choice between good damping and a low corner frequency. If your install has the vertical clearance, this is the one to build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cp\u003eExternal dimensions are \u003cstrong\u003e30 inches wide by 15 inches deep by 7.625 inches tall, measured in the down fire position\u003c\/strong\u003e. Finished weight is 33 pounds. The driver fires down into the floor, so the cabinet couples into the boundary directly beneath it.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. A 10.625 inch opening in a cabinet this short means the baffle is doing real structural work, not just providing thread engagement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup, recessed, with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Bracing\u003c\/h4\u003e\n\u003cp\u003eA \u003cstrong\u003eperimeter cross-brace\u003c\/strong\u003e stiffens the panel spans around the large baffle cutout, and polyfill damping is pre-installed. The driver lands on 8\/32 threaded inserts with stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eTarget \u003cstrong\u003e600 to 800 watts RMS\u003c\/strong\u003e at the woofer impedance. Prodigy rates the NB3-12D4 at 800 watts RMS continuous. It is a dual 4 ohm driver, so a single unit wires to 2 ohms or 8 ohms.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own Prodigy NB3-12D4; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eThe volume, the cutout and the cabinet height all come from the NB3-12's own published numbers. Built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540043821145,"sku":"PO 12-S DF NB3","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12-SDFNB3FaceDown.jpg?v=1787369556"},{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-rockford-fosgate-t1-slim","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Rockford Fosgate T1 Slim","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 12px;color:#fff}.df-hero 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#d99058;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Rockford Fosgate T1 Slim 10\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.99 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e3 in Mounting Depth\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.99\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.755\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, 1Ω\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e40.2 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e7 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Rockford Fosgate T1 Slim 10's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Rockford Fosgate T1 Slim 10\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the T1 Slim 10's \u003cstrong\u003e9.13 inch cutout\u003c\/strong\u003e, the internal height is set by its \u003cstrong\u003e3.00 inch mounting depth\u003c\/strong\u003e, and the volume is built to the top of Rockford's published sealed range for the driver.\u003c\/p\u003e\n\u003cp\u003eThe T1 Slim 10 ships as the \u003cstrong\u003eT1S1-10\u003c\/strong\u003e (1Ω single voice coil) or the \u003cstrong\u003eT1S2-10\u003c\/strong\u003e (2Ω single voice coil), both rated 500 watts RMS with 14.2mm of one-way Xmax. A 2.5 inch four-layer voice coil sits behind an anodized aluminum cone with Rockford's VAST surface technology and an integrated trim ring. Both models share the same 9.13 inch cutout, 3.00 inch depth and 0.03 cubic foot displacement, so this cabinet is direct fit for either impedance.\u003c\/p\u003e\n\u003cp\u003eAt 7 inches tall on a 30 by 15 inch footprint, it fits under rear seats and in cargo wells that will not take a conventional box. Every external dimension is stated as measured in the down fire position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.99 cubic feet net\u003c\/strong\u003e, from 1.02 gross, with the driver's published 0.03 cubic feet of displacement subtracted. That lands at the top of Rockford's published sealed range for the T1 Slim 10.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eThe two coil options are close but not identical. The \u003cstrong\u003eT1S1-10\u003c\/strong\u003e reaches Qtc 0.76 with F3 at 40.2 Hz. The \u003cstrong\u003eT1S2-10\u003c\/strong\u003e reaches Qtc 0.76 with F3 at 38.6 Hz. Both figures are computed from Rockford's published Thiele-Small parameters, so the 1Ω model is the better damped of the two in this box. Both are single voice coil, which means the load your amplifier sees is set by which model you buy rather than by how you wire it.\u003c\/p\u003e\n\u003cp\u003eRun the numbers on a different volume with our \u003ca class=\"df-link\" href=\"\/pages\/sealed-box-calculator\"\u003esealed box calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eWhy Qtc Stays Above 1.0\u003c\/h3\u003e\n\u003cp\u003eThese Qtc figures deserve an honest explanation rather than a marketing one. Free-air Qts on the T1 Slim 10 is \u003cstrong\u003e0.95\u003c\/strong\u003e on the 1Ω model and \u003cstrong\u003e1.05\u003c\/strong\u003e on the 2Ω. Qtc can never fall below Qts, not in a larger box, not in an infinite baffle, not ever. There is no sealed volume that puts a T1 Slim at a textbook 0.707 alignment. Every sealed box built for this driver is underdamped and carries a response peak near the corner frequency.\u003c\/p\u003e\n\u003cp\u003eThat is Rockford's design intent rather than a defect. The peak reads as punch and impact in a vehicle, and it lets a shallow driver in a thin cabinet sound considerably larger than it measures. Since Qtc cannot be pushed below Qts, the only remaining lever is volume, and larger is strictly better: it yields the lowest Qtc and the lowest F3 this driver can reach. A smaller box raises both. That is why we build at 0.99 net rather than something more convenient to ship.\u003c\/p\u003e\n\u003cp\u003eFiring down into the floor, the peak sits where cabin gain is already climbing, which is exactly where this alignment is meant to work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Brace\u003c\/h4\u003e\n\u003cp\u003eCross-bracing ties the long panel spans on a 30 by 15 inch footprint, and polyfill is pre-installed. The driver lands on \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless steel machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eRockford rates both T1 Slim 10 models at \u003cstrong\u003e500 watts RMS\u003c\/strong\u003e continuous. Target 350 to 500 watts RMS. Wiring is simple because both models are single voice coil, so there is no series or parallel decision at the driver: confirm your amplifier is stable at 1Ω for the T1S1-10 or 2Ω for the T1S2-10 before powering the system.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own T1S1-10 or T1S2-10; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eMachined to one driver's published cutout, mounting depth and displacement, then built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540147105881,"sku":"PO 10-S DF T1","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10-SDFT1FaceDown.jpg?v=1787534825"},{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-rockford-fosgate-t1-slim","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Rockford Fosgate T1 Slim","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 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0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#d99058;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Rockford Fosgate T1 Slim 12\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.24 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e3 in Voice Coil\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.24\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.470\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, 1Ω\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.0 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e8.25 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Rockford Fosgate T1 Slim 12's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Rockford Fosgate T1 Slim 12\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the T1 Slim 12's \u003cstrong\u003e11.22 inch cutout\u003c\/strong\u003e, the internal height is set by its \u003cstrong\u003e3.00 inch mounting depth\u003c\/strong\u003e, and the volume is built to the top of Rockford's published sealed range for the driver.\u003c\/p\u003e\n\u003cp\u003eThe T1 Slim 12 ships as the \u003cstrong\u003eT1S1-12\u003c\/strong\u003e (1Ω single voice coil) or the \u003cstrong\u003eT1S2-12\u003c\/strong\u003e (2Ω single voice coil), both rated 600 watts RMS with 15mm of one-way Xmax. Rockford kept a full \u003cstrong\u003e3 inch four-layer voice coil\u003c\/strong\u003e on it, which is unusual for a shallow this thin, behind an anodized aluminum cone with VAST surface technology and an integrated trim ring. Both models share the same 11.22 inch cutout, 3.00 inch depth and 0.05 cubic foot displacement, so this cabinet is direct fit for either impedance.\u003c\/p\u003e\n\u003cp\u003eAt 8.25 inches tall on a 30 by 15 inch footprint, it puts a full 12 into cargo wells and under-seat spaces that normally cap out at a 10. Every external dimension is stated as measured in the down fire position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e1.24 cubic feet net\u003c\/strong\u003e, from 1.289 gross, with the driver's published 0.05 cubic feet of displacement subtracted. That is the top of Rockford's published sealed range for the T1 Slim 12.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eThe coil choice matters more on the 12 than it does on the 10. The \u003cstrong\u003eT1S1-12\u003c\/strong\u003e reaches Qtc 1.47 with F3 at 36.4 Hz. The \u003cstrong\u003eT1S2-12\u003c\/strong\u003e reaches Qtc 1.47 with F3 at 36.0 Hz. Both figures are computed from Rockford's published Thiele-Small parameters, and the gap between them is a real audible difference in control. If your amplifier is happy at either load, take the T1S1-12; it is the better behaved driver in a sealed box by a clear margin.\u003c\/p\u003e\n\u003cp\u003eRun the numbers on a different volume with our \u003ca class=\"df-link\" href=\"\/pages\/sealed-box-calculator\"\u003esealed box calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eWhy Qtc Stays Above 1.0\u003c\/h3\u003e\n\u003cp\u003eThese Qtc figures deserve an honest explanation rather than a marketing one. Free-air Qts on the T1 Slim 12 is \u003cstrong\u003e0.89\u003c\/strong\u003e on the 1Ω model and \u003cstrong\u003e1.06\u003c\/strong\u003e on the 2Ω. Qtc can never fall below Qts, not in a larger box, not in an infinite baffle, not ever. There is no sealed volume that puts a T1 Slim at a textbook 0.707 alignment. Every sealed box built for this driver is underdamped and carries a response peak near the corner frequency.\u003c\/p\u003e\n\u003cp\u003eThat is Rockford's design intent rather than a defect. The peak is what makes a shallow driver in a thin cabinet hit like something larger. Since Qtc cannot be pushed below Qts, the only remaining lever is volume, and larger is strictly better: it yields the lowest Qtc and the lowest F3 this driver can reach. Build it smaller and Qtc and F3 both climb.\u003c\/p\u003e\n\u003cp\u003eFiring down into the floor, the peak sits where cabin gain is already climbing, which is exactly where this alignment is meant to work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Brace\u003c\/h4\u003e\n\u003cp\u003eCross-bracing ties the long panel spans on a 30 by 15 inch footprint, and polyfill is pre-installed. The driver lands on \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless steel machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eRockford rates both T1 Slim 12 models at \u003cstrong\u003e600 watts RMS\u003c\/strong\u003e continuous. Target 450 to 600 watts RMS. Wiring is simple because both models are single voice coil, so there is no series or parallel decision at the driver: confirm your amplifier is stable at 1Ω for the T1S1-12 or 2Ω for the T1S2-12 before powering the system.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own T1S1-12 or T1S2-12; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eMachined to one driver's published cutout, mounting depth and displacement, then built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540147499097,"sku":"PO 12-S DF T1","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12-SDFT1Internal.jpg?v=1787535084"},{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-rockford-fosgate-punch-p3-shallow","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Rockford Fosgate Punch P3 Shallow","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica 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10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Rockford Fosgate Punch P3 Shallow 10\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.92 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eShortest In The Line\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.92\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.795\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D2\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e44.8 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e6.875 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Rockford Fosgate Punch P3 Shallow 10's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Rockford Fosgate Punch P3 Shallow 10\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the P3 Shallow 10's \u003cstrong\u003e9.06 inch cutout\u003c\/strong\u003e, the internal height is set by its \u003cstrong\u003e3.50 inch mounting depth\u003c\/strong\u003e, and the volume is built to the top of Rockford's published sealed range for the driver.\u003c\/p\u003e\n\u003cp\u003eThe P3 Shallow 10 comes as the \u003cstrong\u003eP3SD2-10\u003c\/strong\u003e (dual 2Ω) or the \u003cstrong\u003eP3SD4-10\u003c\/strong\u003e (dual 4Ω), both rated 300 watts RMS with 8.4mm of one-way Xmax. A 2.5 inch four-layer voice coil sits behind an anodized aluminum cone with Rockford's VAST surface technology, and the driver ships with a painted aluminum trim ring. Both models share the same 9.06 inch cutout, 3.50 inch depth and 0.074 cubic foot displacement, so this cabinet is direct fit for either impedance.\u003c\/p\u003e\n\u003cp\u003eAt 6.875 inches tall on a 30 by 15 inch footprint this is the shortest cabinet in the Down Fire line, and it fits under rear seats and in cargo wells that will not take a conventional box. Every external dimension is stated as measured in the down fire position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.92 cubic feet net\u003c\/strong\u003e, from 0.99 gross, with the driver's published 0.074 cubic feet of displacement subtracted. That lands at the top of Rockford's published sealed range for the P3 Shallow 10. Rockford calculates Qtc on gross volume without subtracting the driver, so our figures read slightly higher than theirs against the same box. Same driver, same math, more conservative convention.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eThe two coil options behave differently enough here to be worth understanding. The \u003cstrong\u003eP3SD2-10\u003c\/strong\u003e has a free-air Qts of 0.64 and lands at Qtc 0.795 with F3 at 44.9 Hz, close to a flat alignment and the more controlled, accurate presentation. The \u003cstrong\u003eP3SD4-10\u003c\/strong\u003e has a Qts of 0.78 and lands at Qtc 0.797 with F3 at 44.8 Hz, trading some damping for a lift near the corner frequency and roughly 5 Hz more extension. Neither is wrong: the D2 is the choice for accuracy, the D4 for impact.\u003c\/p\u003e\n\u003cp\u003eOne honest note on the D2. Because its Qts is 0.64, a textbook 0.707 alignment is technically reachable, but the math calls for roughly 2.27 cubic feet net. That is a full size trunk box rather than a shallow cabinet, and building it would defeat the point of buying a 3.5 inch deep driver. At 0.92 net you are as close to flat as this format sensibly allows.\u003c\/p\u003e\n\u003cp\u003eRun the numbers on a different volume with our \u003ca class=\"df-link\" href=\"\/pages\/sealed-box-calculator\"\u003esealed box calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Firing Into Rising Cabin Gain\u003c\/h3\u003e\n\u003cp\u003eThe figures above are anechoic. In a vehicle the sealed rolloff meets rising cabin gain below 60 Hz, so in-car response extends well below the published F3. Firing the cone down into the floor couples the driver to the largest flat surface in the vehicle and puts the output into the cabin where that gain is already working.\u003c\/p\u003e\n\u003cp\u003eThe P3 Shallow is the more accurate of Rockford's two shallow families. Free-air Qts here is 0.64 to 0.78, against 0.95 to 1.05 on the T1 Slim, and that difference is why this driver lands near a flat alignment while the T1 cannot reach one at all. The T1 Slim carries more power and hits harder. The P3 Shallow is the choice when accuracy matters more than raw output.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Brace\u003c\/h4\u003e\n\u003cp\u003eCross-bracing ties the long panel spans on a 30 by 15 inch footprint, and polyfill is pre-installed. The driver lands on \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless steel machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eRockford rates both P3 Shallow 10 models at \u003cstrong\u003e300 watts RMS\u003c\/strong\u003e continuous. Target 200 to 300 watts RMS. Both models are dual voice coil, so you set your final impedance by how you wire the coils at the driver. The enclosure ships with one side mounted terminal cup; confirm your amplifier is stable at the load you wire before powering the system.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own P3SD2-10 or P3SD4-10; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eMachined to one driver's published cutout, mounting depth and displacement, then built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540174499929,"sku":"PO 10-S DF P3S","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10-SDFP3SFront.jpg?v=1787535604"},{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-rockford-fosgate-punch-p3-shallow","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Rockford Fosgate Punch P3 Shallow","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica 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10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Rockford Fosgate Punch P3 Shallow 12\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.12 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e34 Hz Driver Fs\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.12\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.974\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D2\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e39.4 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e7.875 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Rockford Fosgate Punch P3 Shallow 12's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Rockford Fosgate Punch P3 Shallow 12\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the P3 Shallow 12's \u003cstrong\u003e11.22 inch cutout\u003c\/strong\u003e, the internal height is set by its \u003cstrong\u003e3.65 inch mounting depth\u003c\/strong\u003e, and the volume is built near the top of Rockford's published sealed range for the driver.\u003c\/p\u003e\n\u003cp\u003eThe P3 Shallow 12 comes as the \u003cstrong\u003eP3SD2-12\u003c\/strong\u003e (dual 2Ω) or the \u003cstrong\u003eP3SD4-12\u003c\/strong\u003e (dual 4Ω), both rated 400 watts RMS with 8.4mm of one-way Xmax. A 2.5 inch four-layer voice coil sits behind an anodized aluminum cone with Rockford's VAST surface technology, and the driver ships with a painted aluminum trim ring. Both models share the same 11.22 inch cutout, 3.65 inch depth and 0.086 cubic foot displacement, so this cabinet is direct fit for either impedance.\u003c\/p\u003e\n\u003cp\u003eWhat makes this driver work is its Thiele-Small data rather than anything showy: \u003cstrong\u003e34 Hz Fs\u003c\/strong\u003e and a \u003cstrong\u003e1.25 cubic foot Vas\u003c\/strong\u003e, which for a shallow 12 is genuinely good. That is what reaches a 38 Hz F3 in a cabinet under 8 inches tall. Every external dimension is stated as measured in the down fire position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e1.12 cubic feet net\u003c\/strong\u003e, from 1.21 gross, with the driver's published 0.086 cubic feet of displacement subtracted. Rockford calculates Qtc on gross volume without subtracting the driver, so our figures read slightly higher than theirs against the same box. Same driver, same math, more conservative convention.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eThe two coil options sit closer together on the 12 than they do on the 10. The \u003cstrong\u003eP3SD2-12\u003c\/strong\u003e has a free-air Qts of 0.67 and lands at Qtc 0.974 with F3 at 39.4 Hz. The \u003cstrong\u003eP3SD4-12\u003c\/strong\u003e has a Qts of 0.72 and lands at Qtc 1.047 with F3 at 38.1 Hz. Both sit just above unity with a modest lift at the corner frequency and similar extension. On the 10 the same comparison spreads from 0.795 to 0.969, so there the coil is an alignment decision. Here it is not: pick the coil your amplifier wants and stop thinking about it.\u003c\/p\u003e\n\u003cp\u003eRun the numbers on a different volume with our \u003ca class=\"df-link\" href=\"\/pages\/sealed-box-calculator\"\u003esealed box calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eWhy the 12 Reaches Lower Than the 10\u003c\/h3\u003e\n\u003cp\u003eThe difference comes from the drivers rather than the cabinets. The P3 Shallow 12 has a 34 Hz free-air resonance and a 1.25 cubic foot Vas, against 40 Hz and 0.50 cubic feet on the P3 Shallow 10. In these enclosures the 12 lands at an F3 of 38.1 to 39.4 Hz depending on coil, while the 10 lands at 39.6 to 44.9 Hz. Same series, same footprint, same build, and the 12 buys roughly 6 Hz of extension for 1 inch of cabinet height. It also carries more power, 400 watts RMS against 300.\u003c\/p\u003e\n\u003cp\u003eIf your install has 7.875 inches of vertical clearance, this is the one to build.\u003c\/p\u003e\n\u003cp\u003eThe figures above are anechoic. In a vehicle the sealed rolloff meets rising cabin gain below 60 Hz, so in-car response extends well below the published F3.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cp\u003eThe double baffle earns its keep on this cabinet in particular. An 11.22 inch cutout in a box 7.875 inches tall leaves short panel spans and little room for bracing geometry, so baffle rigidity carries more of the structural load than it would in a taller enclosure.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Brace\u003c\/h4\u003e\n\u003cp\u003eCross-bracing ties the long panel spans on a 30 by 15 inch footprint, and polyfill is pre-installed. The driver lands on \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless steel machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eRockford rates both P3 Shallow 12 models at \u003cstrong\u003e400 watts RMS\u003c\/strong\u003e continuous. Target 300 to 400 watts RMS. Both models are dual voice coil, so you set your final impedance by how you wire the coils at the driver. The enclosure ships with one side mounted terminal cup; confirm your amplifier is stable at the load you wire before powering the system.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own P3SD2-12 or P3SD4-12; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eMachined to one driver's published cutout, mounting depth and displacement, then built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540175056985,"sku":"PO 12-S DF P3S","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12-SDFP3SFront.jpg?v=1787535401"},{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-kicker-comprt","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Kicker CompRT","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 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0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#d99058;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Kicker CompRT 10, model 48CWRT104\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.80 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eKlippel Measured T\/S\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.80\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.779-0.922\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e39.4-42.1 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e6.125 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Kicker CompRT 10's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Kicker CompRT 10\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to Kicker's \u003cstrong\u003e9.125 inch mounting hole\u003c\/strong\u003e specification, and the internal height is set by the driver's \u003cstrong\u003e3.4375 inch top mount depth\u003c\/strong\u003e. The finished cabinet stands 6.125 inches tall on a 30 by 15 inch footprint, which puts it under seats and behind back benches where a conventional box will not go.\u003c\/p\u003e\n\u003cp\u003eThe 48CWRT104 is a dual 4 ohm shallow mount rated 400 watts RMS. It uses an injection molded polypropylene cone, a Santoprene rubber surround with Kicker's red double stitching, the SoloKon integrated cone to backplate design, and Forced-Air Cooling that runs the motor roughly 20 percent cooler. The cone and surround are UV resistant, which is why this driver shows up in UTV and open cab builds as often as it does in trucks.\u003c\/p\u003e\n\u003cp\u003eThe Thiele-Small data this enclosure is cut from comes from \u003cstrong\u003eKlippel measurement\u003c\/strong\u003e rather than a datasheet estimate: Fs 32.3 Hz, Qts 0.618, Vas 27.80 liters, Bl 19.158 Tm, Mms 150.85 g, Sd 349.67 cm², and 13.35mm of linear excursion. A 32.3 Hz free air resonance on a shallow 10 is genuinely low, and it is the single parameter that lets a thin driver reach like a full depth one.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.80 cubic feet net\u003c\/strong\u003e out of 0.833 gross. Kicker's published sealed range for the CompRT 10 runs 0.4 to 1.25 cubic feet, so 0.80 sits in the middle of the window the manufacturer sanctions. That volume produces \u003cstrong\u003eQtc 0.922, Fc 48.2 Hz, and a predicted anechoic F3 of 40.0 Hz\u003c\/strong\u003e: a controlled alignment just above unity, with a modest lift near the corner frequency and the composed character the CompRT is known for.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eGoing larger is possible but not worth it in this format. At 1.25 net, the top of Kicker's range, the alignment improves to Qtc 0.826 with F3 at 37.8 Hz. That buys 2.2 Hz of extension in exchange for nearly two additional inches of cabinet height. On a down fire shallow build meant to disappear under a seat, height is the entire point, so the trade goes the wrong way.\u003c\/p\u003e\n\u003cp\u003eFiring down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz, so in car response extends well below the anechoic figure. If you want to see what a different volume does to the same driver, run the numbers on our \u003ca class=\"df-link\" href=\"\/pages\/sealed-box-calculator\"\u003esealed box calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance, which matters on a cabinet only 6.125 inches tall.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Brace\u003c\/h4\u003e\n\u003cp\u003eA perimeter cross-brace ties the long panels together across the 30 inch span. Short cabinets leave little room for bracing geometry, so the brace and the \u003cstrong\u003edouble baffle\u003c\/strong\u003e carry the structural load a taller box would spread out.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eKicker rates the 48CWRT104 at \u003cstrong\u003e400 watts RMS continuous\u003c\/strong\u003e. We recommend 300 to 400 watts RMS on this alignment. The driver is dual 4 ohm, so you set the final impedance at the driver: 2 ohms with the coils in parallel, 8 ohms in series. Most single driver builds want the 2 ohm load.\u003c\/p\u003e\n\u003cp\u003eMounting hardware is included, 8\/32 threaded inserts with stainless steel machine screws, and polyfill damping is pre-installed. The enclosure carries a 1 year limited warranty. Bring your own Kicker 48CWRT104; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eThis cabinet exists for one driver and one orientation. It is cut to the CompRT 10's own measured parameters, machined on our ShopSabre routers, and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540196585561,"sku":"PO 10-S DF CompRT","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10-SDFCompRTInternal.jpg?v=1787381068"},{"product_id":"performance-optimized-down-fire-sealed-dual-10-enclosure-kicker-comprt","title":"Performance Optimized Down Fire Sealed Dual 10\" Enclosure | Kicker CompRT","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#d99058;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire Dual 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of Kicker CompRT 10s, model 48CWRT104\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.586 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eSeparate Chambers\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.586\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net total\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.781-0.925\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc per chamber\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e39.5-42.1 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e10.125 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Kicker CompRT 10's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around a Pair of Kicker CompRT 10s\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. Both baffles are bored to Kicker's \u003cstrong\u003e9.125 inch mounting hole\u003c\/strong\u003e specification, and the internal height is set by the driver's \u003cstrong\u003e3.4375 inch top mount depth\u003c\/strong\u003e. The footprint is the same 30 by 15 inches as the single driver Down Fire, standing 10.125 inches tall. It takes up no more floor area than the single, it simply stands taller, so measure vertical clearance before you order. This is a cargo floor or rear wall build, not an under seat build.\u003c\/p\u003e\n\u003cp\u003eEach 48CWRT104 is a dual 4 ohm shallow mount rated 400 watts RMS. It uses an injection molded polypropylene cone, a Santoprene rubber surround with Kicker's red double stitching, the SoloKon integrated cone to backplate design, and Forced-Air Cooling that runs the motor roughly 20 percent cooler. The cone and surround are UV resistant, which is why this driver turns up in UTV and open cab builds as often as it does in trucks.\u003c\/p\u003e\n\u003cp\u003eThe Thiele-Small data this enclosure is cut from comes from \u003cstrong\u003eKlippel measurement\u003c\/strong\u003e rather than a datasheet estimate: Fs 32.3 Hz, Qts 0.618, Vas 27.80 liters, Bl 19.158 Tm, Mms 150.85 g, Sd 349.67 cm², and 13.35mm of linear excursion. A 32.3 Hz free air resonance on a shallow 10 is genuinely low, and it is what lets a thin driver produce real low frequency output. Two of them put twice the cone area behind that same alignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eTotal internal gross volume is 1.646 cubic feet, split into two 0.823 cubic foot chambers. After displacement that is \u003cstrong\u003e0.793 cubic feet net per driver, 1.586 cubic feet net total\u003c\/strong\u003e. Each chamber produces \u003cstrong\u003eQtc 0.924, Fc 48.3 Hz, and a predicted anechoic F3 of 39.5 Hz\u003c\/strong\u003e, which is within a rounding error of the single driver Down Fire cabinet for this woofer. That match is deliberate. You are not getting a different sound, you are getting roughly 6 dB more of the same one.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eKicker's published sealed range runs 0.4 to 1.25 cubic feet per driver, and the alignment does improve slightly with more air. On this footprint, though, every additional 0.1 cubic feet per chamber adds roughly an inch of cabinet height. Past about 0.8 per chamber a down fire dual stops being a down fire product in any useful sense, so 0.793 is where we stop. Run other volumes for yourself on our \u003ca class=\"df-link\" href=\"\/pages\/sealed-box-calculator\"\u003esealed box calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eFiring down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz, so in car response extends well below the anechoic figure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eBoth driver positions get a \u003cstrong\u003e1.5 inch\u003c\/strong\u003e baffle, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance at each position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eOne Proline X ABS and carbon fiber composite cup with stainless hardware serves both chambers, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e to both driver positions. Side mounted so it stays accessible with the baffles facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSeparate Chambers\u003c\/h4\u003e\n\u003cp\u003eA \u003cstrong\u003efull height 3\/4 inch MDF divider\u003c\/strong\u003e is bonded in, giving each driver its own sealed airspace and its own polyfill. Two drivers sharing one volume interact, with each compression stroke becoming the other's pressure environment, which smears transients and blurs the alignment either would have alone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eKicker rates each 48CWRT104 at \u003cstrong\u003e400 watts RMS continuous\u003c\/strong\u003e. We recommend 300 to 400 watts RMS per driver on this alignment. Both drivers are dual 4 ohm, and the single cup feeds both positions in parallel, so you set the final impedance at the drivers by how you wire each one's coils. Wire both drivers identically; mismatched wiring between chambers splits power unevenly.\u003c\/p\u003e\n\u003cp\u003eMounting hardware is included, two sets of 8\/32 threaded inserts with stainless steel machine screws, and polyfill damping is pre-installed in each chamber. The enclosure carries a 1 year limited warranty. Bring your own pair of Kicker 48CWRT104 subwoofers; the drivers are purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eTwo chambers, one driver each, both cut to the CompRT 10's own measured parameters. Machined on our ShopSabre routers and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540206612569,"sku":"PO 10D-S DF CompRT","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10D-SDFCompRTInternal_II.jpg?v=1787380788"},{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-kicker-comprt","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Kicker CompRT","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Kicker CompRT 12, model 48CWRT124\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.25 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eDeepest In The Line\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.25\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.916-1.137\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.6-38.4 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e8.3125 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Kicker CompRT 12's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Kicker CompRT 12\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle opening and the internal height are cut \u003cstrong\u003edirect fit\u003c\/strong\u003e to the 48CWRT124, so the driver drops in without spacers or trimming. The finished cabinet stands 8.3125 inches tall on a 30 by 15 inch footprint, which puts a full 12 into cargo floors and rear wall positions where a conventional 12 inch box will not go.\u003c\/p\u003e\n\u003cp\u003eThe 48CWRT124 is a dual 4 ohm shallow mount with an injection molded polypropylene cone, a Santoprene rubber surround with Kicker's red double stitching, the SoloKon integrated cone to backplate design, and Forced-Air Cooling that runs the motor roughly 20 percent cooler. The cone and surround are UV resistant, which is why the CompRT turns up in UTV and open cab builds as often as it does in trucks.\u003c\/p\u003e\n\u003cp\u003eThe Thiele-Small data this enclosure is cut from comes from \u003cstrong\u003eKlippel measurement\u003c\/strong\u003e rather than a datasheet estimate: Fs 30.3 Hz, Qts 0.7235, Vas 52.06 liters, Bl 19.1765 Tm, Mms 192.33 g, Sd 506.71 cm², 13.35mm of linear excursion, and 84.66 dB sensitivity at 1W\/1m. A 30.3 Hz free air resonance on a shallow 12 is excellent, and the 52 liter Vas is what gives this driver room to work in a sealed box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e1.25 cubic feet net\u003c\/strong\u003e out of 1.30 gross. That volume produces \u003cstrong\u003eQtc 1.137, Fc 47.6 Hz, and a predicted anechoic F3 of 35.6 Hz\u003c\/strong\u003e, the deepest anechoic extension in the Proline X Down Fire line. It comes from the driver's low resonance and large compliance, not from an oversized cabinet.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eVolume matters more on this driver than it does on the CompRT 10. Dropping to 0.80 net raises Qtc to 1.314 and pushes F3 to 39.5 Hz, costing nearly 4 Hz of extension. On the 10 the same proportional reduction costs about 2 Hz. The difference is the Vas: the 12 has 52 liters of compliance and it genuinely uses the air you give it, so the extra two inches of cabinet height here buys something real. Check the arithmetic yourself on our \u003ca class=\"df-link\" href=\"\/pages\/sealed-box-calculator\"\u003esealed box calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eOne thing worth being straight about. With a free air Qts of 0.7235, \u003cstrong\u003esystem Qtc cannot fall below 0.7235 in any sealed enclosure\u003c\/strong\u003e, so this driver is mildly underdamped in every sealed box regardless of size. That is a design characteristic of the CompRT 12, not a limitation of this cabinet. It produces a modest lift near the corner frequency and the punchy, forward presentation the CompRT is known for. If you want the more damped and neutral of the two CompRT sizes, that is the 10 with its 0.618 Qts. The 12 goes deeper, the 10 plays tighter.\u003c\/p\u003e\n\u003cp\u003eFiring down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz, so in car response extends well below the anechoic figure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets, which maximizes usable internal volume for a given footprint and keeps the cabinet stable on its mounting surface.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance, and it keeps the mounting flange rigid around a 12 inch cutout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Brace\u003c\/h4\u003e\n\u003cp\u003eA perimeter cross-brace ties the long panels together across the 30 inch span. A 12 inch cutout in a cabinet 8.3125 inches tall leaves short panel spans and little room for bracing geometry, so the brace and the \u003cstrong\u003edouble baffle\u003c\/strong\u003e carry load a taller box would spread out.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eThe 48CWRT124 is dual 4 ohm, so you set the final impedance at the driver: 2 ohms with the coils in parallel, 8 ohms in series. Most single driver builds want the 2 ohm load. Confirm your amplifier is stable at that load before powering the system.\u003c\/p\u003e\n\u003cp\u003eMounting hardware is included, 8\/32 threaded inserts with stainless steel machine screws, and polyfill damping is pre-installed. The enclosure carries a 1 year limited warranty. Bring your own Kicker 48CWRT124; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eThis cabinet exists for one driver and one orientation. It is cut to the CompRT 12's own measured parameters, machined on our ShopSabre routers, and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540221063257,"sku":"PO 12-S DF CompRT","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12-SDFCompRTFront.jpg?v=1787381321"},{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-alpine-rs-w-shallow","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Alpine RSW10","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Alpine RS-W10 Shallow\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.50 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eShortest In The Line\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.50\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.49\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D2\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.9-34.1 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e4.75 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Alpine RS-W10's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Alpine RS-W10\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the RS-W10's \u003cstrong\u003e9-5\/8 inch, 243mm cutout\u003c\/strong\u003e, and the internal height is set by a driver that displaces only \u003cstrong\u003e0.04 cubic feet\u003c\/strong\u003e, the smallest published displacement of any driver in the Down Fire series. That is what puts the finished cabinet at \u003cstrong\u003e4.75 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint, the shortest enclosure in the line. If you have measured your under seat space and everything else in the series is an inch too tall, this is the one that goes in.\u003c\/p\u003e\n\u003cp\u003eThe driver ships as the \u003cstrong\u003eRS-W10D2\u003c\/strong\u003e, dual 2 ohm, or the \u003cstrong\u003eRS-W10D4\u003c\/strong\u003e, dual 4 ohm. Both are rated 600 watts RMS and 1800 watts peak, with 20mm of one way linear excursion and 54mm of peak to peak mechanical travel across 380 cm² of cone area. The motor is a high-grade neodymium design driving a 4 inch high-temperature USA-wound voice coil, with Alpine's DD Linear dual magnetic gap holding distortion down when the cone is actually using that excursion, a vented coil former for airflow, and motor cooling fins that pull heat off the coil. The frame is die-cast aluminum with a black anodized threaded rear mounting frame and an aluminum dust cap.\u003c\/p\u003e\n\u003cp\u003eNeodymium is why the cabinet can be this short. There is no ferrite slug behind the cone eating internal air and adding height, so nearly all of the machined cavity is usable volume. Free air resonance is \u003cstrong\u003e30.0 Hz\u003c\/strong\u003e, and the motor's efficiency bandwidth product sits at 18.7 to 27.0 depending on coil, well inside the range that calls for a sealed load rather than a ported one.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.50 cubic feet net\u003c\/strong\u003e out of a 0.539 cubic foot gross cavity. That is Alpine's own small-volume sealed target, and Alpine publishes an \u003cstrong\u003eF3 of 32 Hz\u003c\/strong\u003e at this volume.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eThe two coil variants do not load the same box the same way, so both are worth stating. The \u003cstrong\u003eDual 2-Ohm\u003c\/strong\u003e has a Qts of 0.950 and a 20.64 litre Vas; in 0.50 cubic feet it lands at Qtc 1.49, resonance lifted to 47 Hz, half power at 32.9 Hz. The \u003cstrong\u003eDual 4-Ohm\u003c\/strong\u003e has a Qts of 1.190 and a 23.35 litre Vas; it lands at Qtc 1.94, resonance at 50 Hz, half power at 34.1 Hz. Both figures are anechoic, taken before any cabin gain.\u003c\/p\u003e\n\u003cp\u003eAlpine's published sealed range runs 0.45 to 1.0 cubic feet, and larger volumes do reach lower: 0.75 net gives 30 Hz, 1.00 net gives 28 Hz. We build 0.50 because it is what holds the cabinet at 4.75 inches. A down fire enclosure that no longer fits under a seat has given up the thing that makes it worth building. Firing down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz, and in-car response extends well below the published figure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. A perimeter cross-brace ties the long spans together on a 30 inch wide panel. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance. Mounting is into 8\/32 threaded inserts with stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor. One cup, and both coil variants are dual voice coil, so final impedance is set at the driver.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eShortest In The Line\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003e30 in W x 15 in D x 4.75 in H\u003c\/strong\u003e, measured in the down fire position, with no standoffs under the cabinet. Nothing else in the Down Fire series comes in under 5 inches. Polyfill is pre-installed and the shell is wrapped in plush black carpet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eAlpine rates the RS-W10 at \u003cstrong\u003e600 watts RMS\u003c\/strong\u003e and 1800 watts peak. Target 500 to 600 watts RMS on the amplifier. In this specific volume the cone does not run out of travel first: it reaches its 20.0mm one way limit somewhere between 998 and 1011 watts depending on which coil you have, which is above what the driver can absorb thermally, so the voice coil gives up before the suspension does.\u003c\/p\u003e\n\u003cp\u003eA subsonic filter at 25 Hz, 24 dB per octave, stops the cone wasting travel below the passband and moves that same 20.0mm limit out to roughly 1005 to 1028 watts. That is about 1 percent more amplifier for the price of one filter setting, and it is cheap insurance either way.\u003c\/p\u003e\n\u003cp\u003eBoth versions are dual voice coil, so you set your final impedance at the driver, and Alpine's application guide covers every wiring option for each. The enclosure carries a 1 year limited warranty. Bring your own RS-W10D2 or RS-W10D4; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eThis cabinet exists because one driver's published numbers said 0.50 cubic feet and 4.75 inches. Machined on our ShopSabre routers and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540231483481,"sku":"PO 10-S DF RSW","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10-SDFRSWFaceDown.jpg?v=1787371341"},{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-alpine-rs-w-shallow","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Alpine RSW12","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Alpine RS-W12 Shallow\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.70 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLargest Cone Area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.70\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.73\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D2\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.9-35.4 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e5.75 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Alpine RS-W12's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Alpine RS-W12\u003c\/h3\u003e\n\u003cp\u003eThis is a full 12 in a cabinet \u003cstrong\u003e5.75 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint. The baffle is bored to the RS-W12's \u003cstrong\u003e11-5\/8 inch, 295mm cutout\u003c\/strong\u003e, and the internal height is set by a driver Alpine publishes at only \u003cstrong\u003e0.05 cubic feet\u003c\/strong\u003e of displacement. A conventional 12 displaces two to four times that. This is the shortest 12 inch enclosure in the Down Fire line, and the answer when you want 12 inch cone area and have almost no vertical clearance.\u003c\/p\u003e\n\u003cp\u003eCone area is where this driver earns the cabinet: \u003cstrong\u003e572 cm²\u003c\/strong\u003e, the largest in the Down Fire series. The RS-W12 ships as the \u003cstrong\u003eRS-W12D2\u003c\/strong\u003e, dual 2 ohm, or the \u003cstrong\u003eRS-W12D4\u003c\/strong\u003e, dual 4 ohm. Both are rated 600 watts RMS and 1800 watts peak with 20mm of one way linear excursion and 54mm of peak to peak mechanical travel. The motor is a high-grade neodymium design driving a 4 inch high-temperature USA-wound voice coil, with Alpine's DD Linear dual magnetic gap for low distortion at high excursion, a vented coil former for airflow, and motor cooling fins that pull heat off the coil. The frame is die-cast aluminum with a black anodized threaded rear mounting frame and an aluminum dust cap.\u003c\/p\u003e\n\u003cp\u003eFree air resonance is \u003cstrong\u003e28.0 Hz\u003c\/strong\u003e, and the motor's efficiency bandwidth product lands at 24.3 to 24.8 depending on coil. Anything under 50 is a motor that wants a sealed load, which is why this is a sealed build and not a ported one.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.70 cubic feet net\u003c\/strong\u003e out of a 0.753 cubic foot gross cavity. That sits between Alpine's small and medium sealed recommendations, which puts the \u003cstrong\u003eF3 in the low 30 Hz range\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eThe two coil variants land close together in this box but not on top of each other. The \u003cstrong\u003eDual 2-Ohm\u003c\/strong\u003e has a Qts of 0.980 and a 42.04 litre Vas; in 0.70 cubic feet it reaches Qtc 1.73, resonance lifted to 49 Hz, half power at 33.9 Hz. The \u003cstrong\u003eDual 4-Ohm\u003c\/strong\u003e has a Qts of 1.003 and a 43.84 litre Vas; it reaches Qtc 1.80, resonance at 52 Hz, half power at 35.4 Hz. Both figures are anechoic, taken before any cabin gain.\u003c\/p\u003e\n\u003cp\u003eAlpine's published sealed range runs 0.6 to 1.5 cubic feet: 0.60 net gives 35 Hz, 0.90 net gives 30.5 Hz, 1.20 net gives 29 Hz. We build 0.70 because it is what holds the cabinet at 5.75 inches while still reaching into the low 30s. Firing down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz, and in-car response extends well below the published figure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. A perimeter cross-brace ties the long spans together, which matters more here than anywhere else in the line because a 295mm hole in a 30 inch panel takes a lot of material out of the baffle. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance. Mounting is into 8\/32 threaded inserts with stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor. One cup, and both coil variants are dual voice coil, so final impedance is set at the driver.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eLargest Cone Area\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003e572 cm²\u003c\/strong\u003e of piston in a cabinet measuring \u003cstrong\u003e30 in W x 15 in D x 5.75 in H\u003c\/strong\u003e in the down fire position, with no standoffs underneath. Polyfill is pre-installed and the shell is wrapped in plush black carpet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eAlpine rates the RS-W12 at \u003cstrong\u003e600 watts RMS\u003c\/strong\u003e and 1800 watts peak. Target 500 to 600 watts RMS on the amplifier. In this volume the cone does not run out of travel first: it reaches its 20.0mm one way limit at roughly 1340 to 1341 watts depending on coil, reached first around 48 Hz, far above what the driver can absorb thermally. The voice coil gives up before the suspension does.\u003c\/p\u003e\n\u003cp\u003eA subsonic filter at 25 Hz, 24 dB per octave, stops the cone wasting travel below the passband and moves that same 20.0mm limit out to about 1347 to 1352 watts. That is roughly 1 percent more amplifier for the price of one filter setting.\u003c\/p\u003e\n\u003cp\u003eBoth versions are dual voice coil, so you set your final impedance at the driver, and Alpine's application guide covers every wiring option for each. The enclosure carries a 1 year limited warranty. Bring your own RS-W12D2 or RS-W12D4; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eThe cutout, the internal height and the 0.70 cubic feet all come from one driver's published numbers. Machined on our ShopSabre routers and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540232106073,"sku":"PO 12-S DF RSW","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12-SDFRSWFront.jpg?v=1787371561"},{"product_id":"performance-optimized-down-fire-sealed-dual-10-enclosure-alpine-rs-w-shallow","title":"Performance Optimized Down Fire Sealed Dual 10\" Enclosure | Alpine RSW10","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire Dual 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of Alpine RS-W10 Shallows\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.004 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eSeparate Chambers\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.004\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net total\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.49\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D2\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.9-34.1 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e7.4375 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Alpine RS-W10's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Alpine RS-W10\u003c\/h3\u003e\n\u003cp\u003eTwo chambers, two drivers, one cabinet \u003cstrong\u003e7.4375 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint. Each baffle is bored to the RS-W10's \u003cstrong\u003e9-5\/8 inch, 243mm cutout\u003c\/strong\u003e, and both positions get the same alignment the single driver Down Fire cabinet uses. Against one RS-W10 in that same alignment, the pair delivers roughly 6 dB more maximum output with \u003cstrong\u003e760 cm²\u003c\/strong\u003e of total cone area.\u003c\/p\u003e\n\u003cp\u003eEach driver ships as the \u003cstrong\u003eRS-W10D2\u003c\/strong\u003e, dual 2 ohm, or the \u003cstrong\u003eRS-W10D4\u003c\/strong\u003e, dual 4 ohm, rated 600 watts RMS and 1800 watts peak with 20mm of one way linear excursion and 54mm of peak to peak mechanical travel. The motor is a high-grade neodymium design driving a 4 inch high-temperature USA-wound voice coil, with Alpine's DD Linear dual magnetic gap for low distortion at high excursion, a vented coil former, and motor cooling fins. Frames are die-cast aluminum with black anodized threaded rear mounting frames and aluminum dust caps.\u003c\/p\u003e\n\u003cp\u003eNeodymium is what keeps a dual cabinet this short. Two conventional ferrite 10s in separate chambers would need considerably more height for the same net volume per driver. At Alpine's published \u003cstrong\u003e0.04 cubic feet\u003c\/strong\u003e displaced each, these two drivers together take up less internal room than a single ferrite 10 typically does. Free air resonance is 30.0 Hz and efficiency bandwidth product runs 18.7 to 27.0 depending on coil, comfortably inside the range that calls for a sealed load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eTotal internal gross volume is 1.084 cubic feet, split by the divider into two chambers. After Alpine's published 0.04 cubic feet of displacement per driver, that leaves \u003cstrong\u003e0.50 cubic feet net per chamber\u003c\/strong\u003e and \u003cstrong\u003e1.004 cubic feet net total\u003c\/strong\u003e. The per chamber figure is the number that matters acoustically: each driver only ever sees its own 0.50, which is Alpine's small-volume sealed target exactly, where Alpine publishes an \u003cstrong\u003eF3 of 32 Hz\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eBoth coil variants are worth stating because the enclosure ships without drivers. In 0.50 cubic feet the \u003cstrong\u003eDual 2-Ohm\u003c\/strong\u003e, Qts 0.950 against a 20.64 litre Vas, lands at Qtc 1.49 with resonance lifted to 47 Hz and half power at 32.9 Hz. The \u003cstrong\u003eDual 4-Ohm\u003c\/strong\u003e, Qts 1.190 against a 23.35 litre Vas, lands at Qtc 1.94 with resonance at 50 Hz and half power at 34.1 Hz. Both are anechoic figures, before any cabin gain. Alpine's published sealed range runs 0.45 to 1.0 cubic feet per driver; we build 0.50 because it is what holds the cabinet under 7.5 inches.\u003c\/p\u003e\n\u003cp\u003eFiring down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz, and in-car response extends well below the published figure. Wire both drivers identically so both chambers stay matched.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps both chambers airtight under sustained pressure cycling. Perimeter cross-bracing ties the long spans together. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eBoth front baffles are \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so each driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance per chamber. Two sets of 8\/32 threaded inserts with stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eOne shared Proline X ABS and carbon fiber composite cup with stainless hardware, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e to both driver positions. Side mounted so it stays accessible with the baffles facing the floor. Each driver is dual voice coil, so final impedance is set at the drivers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSeparate Chambers\u003c\/h4\u003e\n\u003cp\u003eA bonded full height \u003cstrong\u003e3\/4 inch MDF divider\u003c\/strong\u003e gives each driver its own sealed airspace. Two drivers sharing one volume interact acoustically, each cone's compression phase becoming the other's pressure environment, which smears transients and blurs the alignment. Separate chambers eliminate that. Polyfill is pre-installed in each chamber.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eAlpine rates each RS-W10 at \u003cstrong\u003e600 watts RMS\u003c\/strong\u003e and 1800 watts peak, so the pair takes 1200 watts RMS combined. Target 500 to 600 watts RMS per driver. In a 0.50 cubic foot chamber the cone reaches its 20.0mm one way limit somewhere between 998 and 1011 watts depending on coil, well above what the driver can absorb thermally, so the voice coil gives up before the suspension does.\u003c\/p\u003e\n\u003cp\u003eA subsonic filter at 25 Hz, 24 dB per octave, stops the cone wasting travel below the passband and moves that same 20.0mm limit out to roughly 1005 to 1028 watts. That is about 1 percent more amplifier for the price of one filter setting.\u003c\/p\u003e\n\u003cp\u003eBoth versions are dual voice coil, so you set your final impedance at the drivers, and Alpine's application guide covers every wiring option. The enclosure carries a 1 year limited warranty. Bring your own pair of RS-W10D2 or RS-W10D4; the drivers are purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eTwo chambers machined to one driver's published numbers rather than one big box split down the middle by eye. Cut on our ShopSabre routers and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540239904857,"sku":"PO 10D-S DF RSW","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10D-SDFRSWFront.jpg?v=1787372527"},{"product_id":"performance-optimized-down-fire-sealed-dual-12-enclosure-alpine-rs-w-shallow","title":"Performance Optimized Down Fire Sealed Dual 12\" Enclosure | Alpine RSW12","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#d99058;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire Dual 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of Alpine RS-W12 Shallows\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.402 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eSeparate Chambers\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.402\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net total\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.73\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D2\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.9-35.4 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e9.4375 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Alpine RS-W12's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Alpine RS-W12\u003c\/h3\u003e\n\u003cp\u003eTwo full 12s in a cabinet \u003cstrong\u003e9.4375 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint, shorter than most dual 10 enclosures. Each baffle is bored to the RS-W12's \u003cstrong\u003e11-5\/8 inch, 295mm cutout\u003c\/strong\u003e, and each driver gets the same alignment the single driver Down Fire cabinet uses. Against one RS-W12 in that alignment, the pair delivers roughly 6 dB more maximum output.\u003c\/p\u003e\n\u003cp\u003eCone area is \u003cstrong\u003e572 cm²\u003c\/strong\u003e per driver and \u003cstrong\u003e1144 cm²\u003c\/strong\u003e across the pair, the most in the Proline X Down Fire line. Each RS-W12 ships as the \u003cstrong\u003eRS-W12D2\u003c\/strong\u003e, dual 2 ohm, or the \u003cstrong\u003eRS-W12D4\u003c\/strong\u003e, dual 4 ohm, rated 600 watts RMS and 1800 watts peak with 20mm of one way linear excursion and 54mm of peak to peak mechanical travel. The motor is a high-grade neodymium design driving a 4 inch high-temperature USA-wound voice coil, with Alpine's DD Linear dual magnetic gap for low distortion at high excursion, a vented coil former, and motor cooling fins. Frames are die-cast aluminum with black anodized threaded rear mounting frames and aluminum dust caps.\u003c\/p\u003e\n\u003cp\u003eNeodymium is what makes a dual 12 cabinet this size practical. A pair of conventional ferrite 12s in separate chambers would demand substantially more height for the same net volume per driver. At Alpine's published \u003cstrong\u003e0.05 cubic feet\u003c\/strong\u003e displaced each, both drivers together consume less internal volume than a single conventional 12 typically does. Free air resonance is 28.0 Hz and efficiency bandwidth product runs 24.3 to 24.8 depending on coil, well inside the range that calls for a sealed load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eTotal internal gross volume is 1.502 cubic feet, split by the divider into two chambers. After Alpine's published 0.05 cubic feet of displacement per driver, that leaves \u003cstrong\u003e0.70 cubic feet net per chamber\u003c\/strong\u003e and \u003cstrong\u003e1.402 cubic feet net total\u003c\/strong\u003e. The per chamber number is the one that governs the sound: each driver only ever sees its own 0.70, which sits between Alpine's small and medium sealed recommendations and puts the \u003cstrong\u003eF3 in the low 30 Hz range\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eBoth coil variants are worth stating because the enclosure ships without drivers. In 0.70 cubic feet the \u003cstrong\u003eDual 2-Ohm\u003c\/strong\u003e, Qts 0.980 against a 42.04 litre Vas, reaches Qtc 1.73 with resonance lifted to 49 Hz and half power at 33.9 Hz. The \u003cstrong\u003eDual 4-Ohm\u003c\/strong\u003e, Qts 1.003 against a 43.84 litre Vas, reaches Qtc 1.80 with resonance at 52 Hz and half power at 35.4 Hz. They land close together here, closer than the 10 inch pair does, and both figures are anechoic, before any cabin gain.\u003c\/p\u003e\n\u003cp\u003eAlpine's published sealed range runs 0.6 to 1.5 cubic feet per driver: 0.60 net gives 35 Hz, 0.90 net gives 30.5 Hz, 1.20 net gives 29 Hz. We build 0.70 per chamber because it is what holds a dual 12 under 9.5 inches while still reaching into the low 30s. Firing down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz, and in-car response extends well below the published figure. Wire both drivers identically so both chambers stay matched.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps both chambers airtight under sustained pressure cycling. Perimeter cross-bracing ties the long spans together, which earns its keep on a baffle carrying two 295mm openings. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eBoth front baffles are \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so each driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance per chamber. Two sets of 8\/32 threaded inserts with stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eOne shared Proline X ABS and carbon fiber composite cup with stainless hardware, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e to both driver positions. Side mounted so it stays accessible with the baffles facing the floor. Each driver is dual voice coil, so final impedance is set at the drivers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSeparate Chambers\u003c\/h4\u003e\n\u003cp\u003eA bonded full height \u003cstrong\u003e3\/4 inch MDF divider\u003c\/strong\u003e gives each driver its own sealed airspace. Two drivers sharing one volume interact acoustically, each cone's compression phase becoming the other's pressure environment, which smears transients and blurs the alignment. Separate chambers eliminate that. Polyfill is pre-installed in each chamber.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eAlpine rates each RS-W12 at \u003cstrong\u003e600 watts RMS\u003c\/strong\u003e and 1800 watts peak, so the pair takes 1200 watts RMS combined. Target 500 to 600 watts RMS per driver. In a 0.70 cubic foot chamber the cone reaches its 20.0mm one way limit at roughly 1340 to 1341 watts depending on coil, reached first around 48 Hz, far above what the driver can absorb thermally. The voice coil gives up before the suspension does.\u003c\/p\u003e\n\u003cp\u003eA subsonic filter at 25 Hz, 24 dB per octave, stops the cone wasting travel below the passband and moves that same 20.0mm limit out to about 1347 to 1352 watts. That is roughly 1 percent more amplifier for the price of one filter setting.\u003c\/p\u003e\n\u003cp\u003eBoth versions are dual voice coil, so you set your final impedance at the drivers, and Alpine's application guide covers every wiring option. The enclosure carries a 1 year limited warranty. Bring your own pair of RS-W12D2 or RS-W12D4; the drivers are purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eTwo chambers, each machined to one driver's published numbers rather than one large box split down the middle by eye. Cut on our ShopSabre routers and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540240461913,"sku":"PO 12D-S DF RSW","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12D-SDFRSWFront.jpg?v=1787372235"},{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-arc-audio-a10","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Arc Audio A10","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 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strong{color:#fff}.df-grid{display:flex;flex-wrap:wrap;gap:18px;margin-top:8px}.df-card{flex:1 1 280px;background:#1c1917;border:1px solid #292524;border-top:3px solid #b87333;border-radius:8px;padding:20px 22px}.df-card h4{color:#e8b98d;margin:0 0 8px;font-size:1.04em}.df-card p{margin:0;font-size:.95em;color:#a8a29e}.df-card strong{color:#fff}.df-highlight{background:#3d2412;border-left:4px solid #b87333;border-radius:0 8px 8px 0;padding:18px 22px;margin:18px 0}.df-highlight p{margin:0;color:#d6d3d1}.df-highlight strong{color:#fff}.df-enc{background:#1c1917;color:#d6d3d1;padding:42px 36px;border-bottom:1px solid #292524}.df-enc h3{color:#fff;font-size:1.45em;font-weight:700;margin:0 0 14px;border-left:4px solid #b87333;padding-left:14px}.df-enc p{margin:0 0 14px;color:#d6d3d1}.df-enc-card{background:#292524;border:1px solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#d99058;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Arc Audio A10\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.80 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e26.995 Hz Fs\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.80\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.854\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e39.0 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e6.25 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Arc Audio A10's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Arc Audio A10\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the A10's \u003cstrong\u003e9.06 inch cutout\u003c\/strong\u003e, the internal height is set by its \u003cstrong\u003e3.77 inch mounting depth\u003c\/strong\u003e and 4.24 inch overall depth, and the cavity is machined to the volume Arc Audio publishes for this driver. The finished cabinet stands 6.25 inches tall on a 30 by 15 inch footprint, measured in the down fire position, which fits under seats and in cargo wells that will not take a conventional box.\u003c\/p\u003e\n\u003cp\u003eThe number that sets this driver apart is its \u003cstrong\u003e26.995 Hz free-air resonance\u003c\/strong\u003e. That is exceptionally low for a 10 inch subwoofer of any depth, and unusual for one that mounts in under four inches. Most 10s sit in the mid to high 30s, and shallow 10s are typically worse because a shortened motor and a stiffer suspension push resonance up. Arc got this one down near 27 Hz on both coil variants.\u003c\/p\u003e\n\u003cp\u003eArc pairs that low Fs with a moderate Qts, \u003cstrong\u003e0.477 on the A10D2 and 0.506 on the A10D4\u003c\/strong\u003e. That is the combination that lets the driver reach a properly damped sealed alignment instead of being forced into an underdamped one. Xmax is 8mm one way, sensitivity is 85.4 dB at 1W\/1m, and both variants are rated 250 watts RMS with 500 watts musical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eThe machined cavity measures \u003cstrong\u003e0.859 cubic feet gross\u003c\/strong\u003e, which matches Arc Audio's own optimum sealed recommendation of 0.85 gross. After the driver's displacement is subtracted the working airspace is approximately \u003cstrong\u003e0.80 cubic feet net\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eRead that pair of numbers carefully, because Arc publishes their sealed recommendations as \u003cstrong\u003egross\u003c\/strong\u003e volume rather than net, which is unusual. Almost every other manufacturer states net, meaning the airspace left after the driver's own displacement is removed. We built to Arc's gross figure as published, so this is the enclosure Arc designed the driver around. Both conventions are listed so you can compare against either one.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eThe two coil variants land in different places in this volume. The \u003cstrong\u003eA10D2\u003c\/strong\u003e reaches Qtc 0.796 with F3 at 40.6 Hz, the more damped of the two, with tighter transient control. The \u003cstrong\u003eA10D4\u003c\/strong\u003e carries the higher Qts and lands at Qtc 0.854 with F3 at 39.0 Hz, a little less damped and a little lower. The D4 also runs considerably more motor force at 18.090 T against the D2's 13.766. Both are 250 watts RMS with identical fitment, so choose on the load your amplifier is stable and efficient into. Arc's published range runs from 0.65 gross minimum to 1.1 gross maximum; the minimum pushes Qtc higher with no meaningful height savings, and the maximum adds cabinet height for roughly 2 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Brace\u003c\/h4\u003e\n\u003cp\u003eA perimeter cross-brace ties the long spans together on a 30 by 15 inch panel. Arc's own manual makes the point that energy lost to panel flex is energy not converted to sound, which is exactly what this construction prevents. Polyfill is pre-installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire and Cabin Gain\u003c\/h3\u003e\n\u003cp\u003eThe driver fires down into the floor and the cabinet couples to the surface it sits on. A sealed rolloff is gradual, 12 dB per octave below the corner frequency, and it meets rising cabin gain on the way down. Arc's own documentation notes that cabin gain adds roughly 12 dB per octave below 50 Hz in most vehicles. With a 27 Hz Fs this driver has the low end capability to take advantage of that, so in-car response extends well below the anechoic figure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eArc rates the A10 at \u003cstrong\u003e250 watts RMS continuous with 500 watts musical\u003c\/strong\u003e. Their documentation is direct about what happens above that: sustained operation beyond the RMS rating will burn the voice coil, and that damage is treated as abuse rather than a warranty claim. Arc also notes that underpowering carries no risk, but a small amplifier driven into clipping does. Feed it clean, unclipped power in the 200 to 250 watt range.\u003c\/p\u003e\n\u003cp\u003eBoth variants are dual voice coil, so final impedance is set at the driver. Drivers mount to 8\/32 threaded inserts with stainless machine screws, included. The enclosure carries a 1 year limited warranty. Bring your own A10D2 or A10D4; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eOne driver, one volume, one set of machine files. Cut, assembled and inspected one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540250390617,"sku":"PO 10-S DF A10","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10-SDFAFront.jpg?v=1787375270"},{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-arc-audio-a12","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Arc Audio A12","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 12px;color:#fff}.df-hero 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Arc Audio A12\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.92 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e25.010 Hz Fs\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.92\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.208\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D2\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e36.3 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e6.875 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Arc Audio A12's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Arc Audio A12\u003c\/h3\u003e\n\u003cp\u003eThe baffle is bored to the A12's \u003cstrong\u003e10.91 inch cutout\u003c\/strong\u003e and the internal height is set by its \u003cstrong\u003e3.76 inch mounting depth\u003c\/strong\u003e and 4.32 inch overall depth. The finished cabinet stands 6.875 inches tall on a 30 by 15 inch footprint, measured in the down fire position, which puts a full 12 into spaces that normally cap out at a 10.\u003c\/p\u003e\n\u003cp\u003eOne detail worth noticing: the A12 mounts \u003cstrong\u003eshallower than the A10\u003c\/strong\u003e, 3.76 inches against 3.77. Practically identical, which means moving from the 10 to the 12 in this series costs nothing in mounting depth. It costs cutout diameter and 0.625 inches of cabinet height.\u003c\/p\u003e\n\u003cp\u003eThe A12D2 carries a \u003cstrong\u003e25.010 Hz free-air resonance\u003c\/strong\u003e, the lowest of any driver in the Proline X Down Fire line, paired with a 76.32 liter Vas. The A12D4 sits at 26.995 Hz with 81.81 liters. Those are large-driver numbers from a shallow-mount platform. Xmax is 8mm one way, sensitivity is 87 dB at 1W\/1m, and both variants are rated 300 watts RMS with 600 watts musical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eThe machined cavity measures \u003cstrong\u003e0.994 cubic feet gross\u003c\/strong\u003e, matching Arc Audio's own optimum sealed recommendation of 1.0 gross. After driver displacement the working airspace is approximately \u003cstrong\u003e0.92 cubic feet net\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eArc publishes their sealed recommendations as \u003cstrong\u003egross\u003c\/strong\u003e volume rather than net, which is unusual. Most manufacturers state net, meaning the airspace left after the driver's own displacement is removed. We built to Arc's gross figure as published, and both conventions appear in the specifications so you can compare against either one.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eAlignment Character, Stated Plainly\u003c\/h3\u003e\n\u003cp\u003eThe A12 runs a higher Qts than the A10: \u003cstrong\u003e0.612 on the D2 and 0.659 on the D4\u003c\/strong\u003e, against 0.477 and 0.506. System Qtc can never fall below the driver's own Qts in any sealed enclosure, regardless of volume, so this driver produces an underdamped alignment with a lift near the corner frequency. That is the A12's character, and Arc's optimum recommendation places it there deliberately.\u003c\/p\u003e\n\u003cp\u003eIn this volume the \u003cstrong\u003eA12D2\u003c\/strong\u003e lands at Qtc 1.208 with F3 at 36.3 Hz. The \u003cstrong\u003eA12D4\u003c\/strong\u003e lands at Qtc 1.336 with F3 at 39.2 Hz, so the D2 is both better damped and nearly 3 Hz lower. The D4 does carry higher motor force at 16.965 T against 13.948. If either load suits your amplifier, the D2 is the stronger choice here.\u003c\/p\u003e\n\u003cp\u003eArc also publishes a \u003cstrong\u003emaximum sealed volume of 1.25 gross\u003c\/strong\u003e. That is the more damped build, in a cabinet roughly 1.2 inches taller at 8.0625 inches. We ship the optimum because it is what Arc specifies and because it keeps the cabinet under 7 inches. The taller build is available on request if the clearance is there.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced for a 10.91 Inch Cutout\u003c\/h4\u003e\n\u003cp\u003eA 10.91 inch opening in a cabinet under 7 inches tall puts real structural load on the baffle. The double layer carries it, and a perimeter cross-brace ties the long 30 by 15 inch spans together. Polyfill is pre-installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire and Cabin Gain\u003c\/h3\u003e\n\u003cp\u003eThe driver fires down into the floor and the cabinet couples to the surface it sits on. The sealed rolloff is gradual and meets rising cabin gain on the way down. Arc's own documentation notes that cabin gain adds roughly 12 dB per octave below 50 Hz, and with a 25 Hz Fs the D2 has real capability down there, so in-car response extends well below the anechoic figure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eArc rates the A12 at \u003cstrong\u003e300 watts RMS continuous with 600 watts musical\u003c\/strong\u003e. Their documentation is blunt that sustained operation above the RMS rating burns voice coils and is not covered under warranty. Underpowering carries no risk, but a small amplifier driven into clipping does. Feed it clean, unclipped power in the 250 to 300 watt range and watch your gains.\u003c\/p\u003e\n\u003cp\u003eBoth variants are dual voice coil, so final impedance is set at the driver. Drivers mount to 8\/32 threaded inserts with stainless machine screws, included. The enclosure carries a 1 year limited warranty. Bring your own A12D2 or A12D4; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eOne driver, one volume, one set of machine files. Cut, assembled and inspected one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540250947673,"sku":"PO 12-S DF A","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12-SDFAFaceDown.jpg?v=1787374914"},{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-arc-audio-sw10","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Arc Audio SW10","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 12px;color:#fff}.df-hero 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#d99058;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Arc Audio SW10\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.55 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eShortest In The Line\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.55\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.843\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e45.9 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e5.0625 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Arc Audio SW10's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Arc Audio SW10\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the SW10's \u003cstrong\u003e9.1 inch cutout\u003c\/strong\u003e, with a 10.3 inch outer diameter to clear, and the internal height is set by its \u003cstrong\u003e2.4 inch mounting depth\u003c\/strong\u003e, or 2.25 inches front loaded. That is the shallowest driver in the Proline X Down Fire program, and the finished cabinet stands just \u003cstrong\u003e5.0625 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint.\u003c\/p\u003e\n\u003cp\u003eThe SW10 is a dual voice coil driver offered in dual 2 ohm or dual 4 ohm, rated 350 watts RMS and 700 watts peak. Cone area is 338.16 cm² and the force factor is 16.365 Tm wired in series.\u003c\/p\u003e\n\u003cp\u003eArc publishes full Thiele-Small data for this driver in both series and parallel wiring, which most manufacturers do not bother with, and the two land within a hair of each other: Fs 39.3 against 39.0 Hz, Qts 0.624 against 0.634, Vas 12.96 against 13.33 liters. One enclosure therefore serves both wiring choices properly, which is not always true of dual voice coil drivers. Wire for whatever load your amplifier is stable and efficient into.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.604 cubic feet gross\u003c\/strong\u003e, against Arc Audio's published optimum sealed recommendation of 0.6 gross. Net internal airspace after panel thickness, bracing and the driver's own displacement is approximately \u003cstrong\u003e0.55 cubic feet\u003c\/strong\u003e. Arc publishes their sealed recommendations as gross rather than net, which is unusual, so both figures are listed in the specifications.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eThat volume produces \u003cstrong\u003eQtc 0.843 with Fc at 53.1 Hz and a predicted F3 of 45.9 Hz\u003c\/strong\u003e. A Qts of 0.624 is a healthy, moderate figure, so unlike a lot of shallow drivers this one reaches a properly controlled alignment rather than sitting underdamped regardless of box size. Arc's published range runs 0.4 gross minimum to 0.9 gross maximum; the optimum is what we build.\u003c\/p\u003e\n\u003cp\u003eThe tradeoff on this driver is worth stating plainly. A 39.3 Hz free air resonance and a 12.96 liter Vas are both the price of a 2.4 inch motor, and they put F3 in the mid 40s rather than the 30s. What you get in exchange is a cabinet just over five inches tall. Arc's own documentation notes that cabin gain adds roughly 12 dB per octave below 50 Hz in most vehicles, and firing down into the floor this driver is built to lean on that. If clearance is your binding constraint, this is the driver that fits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cp\u003eOn a cabinet this short the baffle carries a large share of the structural load, because there is minimal room for bracing geometry. Perimeter cross-bracing and pre-installed polyfill complete the build. Finished dimensions are 30 inches wide by 15 inches deep by 5.0625 inches tall, measured in the down fire position.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eStructure In A 5 Inch Cabinet\u003c\/h4\u003e\n\u003cp\u003ePerimeter cross-bracing works with the doubled baffle to hold a 30 inch span rigid in a cabinet just over five inches tall. The driver lands on \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eArc rates the SW10 at \u003cstrong\u003e350 watts RMS\u003c\/strong\u003e with 700 watts peak. It is dual voice coil in 2 ohm or 4 ohm, and final impedance is set at the driver. Since the series and parallel Thiele-Small figures are effectively identical, the enclosure alignment holds either way.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own Arc Audio SW10; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eOne driver, one cutout, one volume target. Every Performance Optimized cabinet is machined to a single driver's published numbers and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540305670233,"sku":"PO 10-S DF SW10","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10-SDFSWFaceDown.jpg?v=1787373512"},{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-arc-audio-sw12","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Arc Audio SW12","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Arc Audio SW12\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.74 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eShallowest 12 In The Line\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.74\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.007\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e41.9 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e6 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Arc Audio SW12's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Arc Audio SW12\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the SW12's \u003cstrong\u003e11 inch cutout\u003c\/strong\u003e, with a 12.5 inch outer diameter to clear, and the internal height is set by its \u003cstrong\u003e2.4 inch mounting depth\u003c\/strong\u003e, or 2.23 inches front loaded. That is the shallowest 12 inch mounting depth in the Proline X Down Fire program, shallower than most 8 inch subwoofers, and it is what lets the finished cabinet stand exactly \u003cstrong\u003e6 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint.\u003c\/p\u003e\n\u003cp\u003eThe SW12 is a dual voice coil driver offered in dual 2 ohm or dual 4 ohm, rated 400 watts RMS and 800 watts peak. Cone area is 532.97 cm² and the force factor is 23.955 Tm wired in series. For a driver this thin that is a lot of capability.\u003c\/p\u003e\n\u003cp\u003eThe number that separates it from the SW10 is a \u003cstrong\u003e33.1 Hz free air resonance\u003c\/strong\u003e against the 10's 39.3, with Vas nearly triple at 33.44 liters against 12.96. Same mounting depth, same series, but the 12 reaches meaningfully lower. Arc publishes full Thiele-Small data in both series and parallel wiring and the two are effectively identical: Fs 33.1 against 33.0 Hz, Qts 0.624 against 0.616, Vas 33.44 against 33.73 liters. One enclosure serves either wiring choice properly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.806 cubic feet gross\u003c\/strong\u003e, against Arc Audio's published optimum sealed recommendation of 0.8 gross. Net internal airspace after panel thickness, bracing and the driver's own displacement is approximately \u003cstrong\u003e0.74 cubic feet\u003c\/strong\u003e. Arc publishes their sealed recommendations as gross rather than net, which is unusual, so both figures are listed in the specifications.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eThat volume produces \u003cstrong\u003eQtc 1.007 with Fc at 53.4 Hz and a predicted F3 of 41.9 Hz\u003c\/strong\u003e. Qtc right around unity gives a modest lift at the corner without the exaggerated peak that high Qts shallow drivers produce. A Qts of 0.624 is a healthy, moderate figure, so this driver reaches a usable alignment rather than being forced underdamped by its own parameters. Arc's published range runs 0.65 gross minimum to 1.0 gross maximum, and the optimum is the right place on this driver.\u003c\/p\u003e\n\u003cp\u003eFiring down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz. Arc's own documentation notes that cabin gain adds roughly 12 dB per octave below 50 Hz in most vehicles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cp\u003eThe doubled baffle matters here: an 11 inch cutout in a cabinet only 6 inches tall removes a large share of the structural face. Perimeter cross-bracing and pre-installed polyfill complete the build. Finished dimensions are 30 inches wide by 15 inches deep by 6 inches tall, measured in the down fire position.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBracing Under An 11 Inch Cutout\u003c\/h4\u003e\n\u003cp\u003ePerimeter cross-bracing holds the 30 inch span rigid around the opening. The driver lands on \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e with stainless machine screws included, so the mounting holes do not wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eArc rates the SW12 at \u003cstrong\u003e400 watts RMS\u003c\/strong\u003e with 800 watts peak across 532.97 square centimeters of cone. It is dual voice coil in 2 ohm or 4 ohm, and final impedance is set at the driver. Because the series and parallel Thiele-Small figures are effectively identical, the enclosure alignment holds either way; pick your wiring purely on amplifier impedance.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own Arc Audio SW12; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eOne driver, one cutout, one volume target. Every Performance Optimized cabinet is machined to a single driver's published numbers and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540306980953,"sku":"PO 12-S DF SW12","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12-SDFSWInternal.jpg?v=1787373890"},{"product_id":"performance-optimized-down-fire-sealed-dual-10-enclosure-arc-audio-sw10","title":"Performance Optimized Down Fire Sealed Dual 10\" Enclosure | Arc Audio SW10","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire Dual 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of Arc Audio SW10\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.10 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eSeparate Chambers\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.10\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net total\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.845\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc per chamber\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e45.9 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e8 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Arc Audio SW10's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Arc Audio SW10\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. Both baffles are bored to the SW10's \u003cstrong\u003e9.1 inch cutout\u003c\/strong\u003e, with a 10.3 inch outer diameter to clear, and the internal height is set by its \u003cstrong\u003e2.4 inch mounting depth\u003c\/strong\u003e, or 2.25 inches front loaded. That is the shallowest driver in the Proline X Down Fire program, which is why a dual 10 lands at \u003cstrong\u003e8 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint, only about three inches taller than the single driver cabinet.\u003c\/p\u003e\n\u003cp\u003eEach SW10 is a dual voice coil driver offered in dual 2 ohm or dual 4 ohm, rated 350 watts RMS and 700 watts peak, for \u003cstrong\u003e700 watts RMS combined\u003c\/strong\u003e. Cone area is 338.16 cm² each, \u003cstrong\u003e676.32 cm² across the pair\u003c\/strong\u003e, which is roughly 6 dB more maximum output than a single.\u003c\/p\u003e\n\u003cp\u003eArc publishes complete Thiele-Small data for both series and parallel wiring, and the two land within a hair of each other: Fs 39.3 against 39.0 Hz, Qts 0.624 against 0.634, Vas 12.96 against 13.33 liters. One enclosure serves either wiring choice correctly. Wire both drivers identically, since mismatched wiring between chambers splits power unevenly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eTotal internal gross volume is 1.202 cubic feet, split into two chambers of \u003cstrong\u003e0.601 cubic feet gross each\u003c\/strong\u003e, which matches Arc Audio's optimum sealed recommendation of 0.6 gross per driver almost exactly. Net internal airspace after panel thickness, bracing, the divider and the driver's own displacement is approximately \u003cstrong\u003e0.55 cubic feet per chamber, 1.10 cubic feet total\u003c\/strong\u003e. Arc publishes their sealed recommendations as gross rather than net, which is unusual, so both figures are listed in the specifications.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003ePer driver that volume produces \u003cstrong\u003eQtc 0.845 with Fc at 53.1 Hz and a predicted F3 of 45.9 Hz\u003c\/strong\u003e, the same alignment as the single driver cabinet. Identical character, twice the cone area behind it. A Qts of 0.624 is a healthy, moderate figure, so this driver reaches a properly controlled alignment rather than sitting underdamped regardless of box size. Arc's published range runs 0.4 gross minimum to 0.9 gross maximum per driver.\u003c\/p\u003e\n\u003cp\u003eThe tradeoff is worth stating plainly. A 39.3 Hz free air resonance and a 12.96 liter Vas are the cost of a 2.4 inch motor, so F3 sits in the mid 40s rather than the 30s. Firing down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz, which is exactly where this alignment is designed to work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eTwo Chambers, Full Divider\u003c\/h3\u003e\n\u003cp\u003eThis enclosure follows the Proline X standing design rule for dual sealed builds: \u003cstrong\u003etwo fully separate chambers\u003c\/strong\u003e divided by a bonded full height 3\/4 inch MDF panel, giving each driver its own dedicated airspace and its own polyfill.\u003c\/p\u003e\n\u003cp\u003eTwo drivers sharing one sealed volume interact acoustically. Each driver's compression phase becomes the pressure environment the other is working against, which smears transient response and blurs the alignment each would have on its own. A full height bonded divider stops that cold, and each SW10 produces its own clean sealed alignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps both chambers airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cp\u003ePerimeter cross-bracing and pre-installed polyfill in each chamber complete the build. Both drivers fire down into the floor. Finished dimensions are 30 inches wide by 15 inches deep by 8 inches tall, measured in the down fire position.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eFront baffles are \u003cstrong\u003e1.5 inches\u003c\/strong\u003e at both driver positions, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so each driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eOne shared Proline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e to both driver positions in parallel. Side mounted so it stays accessible with the baffles facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSeparate Chambers\u003c\/h4\u003e\n\u003cp\u003eA bonded full height \u003cstrong\u003e3\/4 inch MDF divider\u003c\/strong\u003e splits the cabinet into two sealed volumes of 0.601 cubic feet gross each. Both drivers land on 8\/32 threaded inserts, two sets of stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eArc rates each SW10 at \u003cstrong\u003e350 watts RMS\u003c\/strong\u003e with 700 watts peak, so combined handling is 700 watts RMS. The single side mounted cup carries one pair of posts fed to both driver positions in parallel, so you do not wire the two chambers separately at the amplifier. Final impedance is set at the drivers by how you wire each one's coils, and both drivers should be wired identically.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own pair of Arc Audio SW10 subwoofers; the drivers are purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eOne driver, one cutout, one volume target, done twice with a full divider between them. Every Performance Optimized cabinet is machined to a single driver's published numbers and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540324347993,"sku":"PO 10D-S DF SW10","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10D-SDFSWInternal.jpg?v=1787378015"},{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-diamond-audio-dmd-sh","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Diamond Audio DMD-SH","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#d99058;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Diamond Audio DMD-SH 10\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.80 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eKlippel Optimized Motor\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.80\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.981\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e52.4 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff, D4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e6.125 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Diamond Audio DMD-SH 10's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the DMD-SH 10\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the driver's \u003cstrong\u003e9.13 inch cutout\u003c\/strong\u003e, the internal height is set by its \u003cstrong\u003e3.00 inch mounting depth\u003c\/strong\u003e, and the 10.87 inch total diameter Diamond publishes sits inside a 30 by 15 inch footprint. The finished cabinet stands 6.125 inches tall measured in the down fire position, low enough for under seat and cargo well installs that will not take a conventional box.\u003c\/p\u003e\n\u003cp\u003eThe DMD-SH is a shallow mount design: an aluminum heatsink dust cap over a high strength paper cone, a die-cast shallow frame, a vented pole for cooler operation, oversized push terminals, a black spider with woven tinsel leads, and a wrap-around ABS mounting gasket. Diamond states that the motor and suspension symmetry are \u003cstrong\u003eKlippel optimized\u003c\/strong\u003e. Effective piston area is 0.0359 square meters.\u003c\/p\u003e\n\u003cp\u003eThe two coil variants sit further apart than most dual impedance pairs. The \u003cstrong\u003eDMD102SH\u003c\/strong\u003e, dual 2 ohm, runs a Qts of 0.66 with 13.7 T of motor force and 7.9mm of Xmax. The \u003cstrong\u003eDMD104SH\u003c\/strong\u003e, dual 4 ohm, runs a Qts of 0.77 with 16.4 T and 8.8mm. The D4 carries the stronger motor and the longer travel, the D2 the better damping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.80 cubic feet net\u003c\/strong\u003e out of 0.859 cubic feet gross, against Diamond's suggested 0.45 cubic feet. Their figure puts the D2 near Qtc 0.98 and the D4 above 1.14, both underdamped with a lift at the corner. At 0.80 net you get meaningfully better damping and 2 to 3 Hz more extension, and Diamond's own manual presents its enclosure table as a suggestion rather than a specification. On a down fire cabinet that extra volume costs about an inch of height.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eIn this volume the \u003cstrong\u003eDMD104SH lands at Qtc 0.981 with F3 at 52.4 Hz\u003c\/strong\u003e and the \u003cstrong\u003eDMD102SH at Qtc 0.856\u003c\/strong\u003e. The D2 is the more damped alignment of the two, the D4 the one with the motor force and the excursion behind it. Both figures are computed from the Thiele-Small parameters Diamond publishes, and they do not match the Qtc values printed in Diamond's own enclosure table, which run lower by roughly 0.2 to 0.3 across every variant. No gross versus net convention closes a gap that size, so we publish the figure that follows from the driver data.\u003c\/p\u003e\n\u003cp\u003eFree-air resonance is 48.0 Hz on the D2 and 48.5 Hz on the D4. That is high, and it is the reason F3 lands in the low 50s in any sealed volume. This is a driver for punch and midbass authority from a 3 inch mounting depth rather than for deep extension.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance. Mounting is into 8\/32 threaded inserts, stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Bracing\u003c\/h4\u003e\n\u003cp\u003ePerimeter cross-bracing ties the long spans together on a wide, shallow cabinet where panel area is the main resonance risk. Polyfill is pre-installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Firing Into the Floor\u003c\/h3\u003e\n\u003cp\u003eThe driver fires downward into the floor and the cabinet couples to the surface it sits on. No standoffs are required; the cabinet sits flat. The sealed rolloff meets rising cabin gain below 60 Hz, so in-car response extends well below the anechoic figures quoted above.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eThe DMD-SH 10 is rated \u003cstrong\u003e250 watts RMS and 500 watts maximum\u003c\/strong\u003e. Both variants are dual voice coil, so the final load is set at the driver. Confirm the result against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own DMD102SH or DMD104SH; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eOne cabinet, one driver, one alignment worked out from the published parameters instead of a table of round numbers. Machined, assembled and inspected one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540389752921,"sku":"PO 10-S DF DMD","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-dual-15-sealed-enclosure-built-for-resonix-gus-15subwoofer-enclosuresproline-x-9360178_b25bcf2a-8ef4-40bf-8537-7e0e54cf8b7c.jpg?v=1787112325"},{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-diamond-audio-dmd-sh","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Diamond Audio DMD-SH","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Diamond Audio DMD-SH 12, DMD122SH or DMD124SH\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.25 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e3 Inch Mounting Depth\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.25\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.052\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D2\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e51.4 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff, D2\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e8.3125 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Diamond Audio DMD-SH 12's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the DMD-SH 12\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the DMD-SH 12's \u003cstrong\u003e11.06 inch cutout\u003c\/strong\u003e, and the driver needs only a \u003cstrong\u003e3.00 inch mounting depth\u003c\/strong\u003e, the same depth Diamond specifies for the 10 inch model. Stepping up from the 10 to the 12 in this series costs nothing in depth, only cutout diameter and about two inches of cabinet height. The finished box is 8.3125 inches tall on a 30 by 15 inch footprint, which puts a full 12 into cargo floors and rear wall positions where a conventional 12 will not go. Total driver diameter is 12.83 inches.\u003c\/p\u003e\n\u003cp\u003eDiamond builds the DMD-SH on a die-cast shallow frame with a high-strength paper cone and an \u003cstrong\u003ealuminum heatsink dust cap\u003c\/strong\u003e that pulls heat away from the coil. The pole is vented for cooler operation, the black spider carries woven tinsel leads, terminals are oversized push type, and a wrap-around ABS gasket seals the mounting flange against the baffle. Diamond states the motor and suspension symmetry are \u003cstrong\u003eKlippel optimized\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe driver is sold in two coil configurations: the \u003cstrong\u003eDMD122SH\u003c\/strong\u003e, dual 2 ohm, and the \u003cstrong\u003eDMD124SH\u003c\/strong\u003e, dual 4 ohm. Both share the same 3.00 inch mounting depth and 11.06 inch cutout, so this cabinet is a direct fit for either one. Both are rated 300 watts RMS and 600 watts maximum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e1.25 cubic feet net\u003c\/strong\u003e out of a machined cavity of 1.30 cubic feet gross. Diamond suggests 0.75 cubic feet for this driver, and we build larger on purpose. At their figure the DMD122SH computes to roughly Qtc 1.20 and the DMD124SH to above 1.42. At 1.25 net the alignment is better damped on both variants with 1 to 2 Hz more extension, and Diamond's own manual presents its enclosure table as a suggestion rather than a specification.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eCoil choice matters more than usual on this driver. The \u003cstrong\u003eDMD122SH\u003c\/strong\u003e runs a Qts of 0.77 with 13.7 T of motor force and 7.9mm of Xmax, and in 1.25 cubic feet it lands at \u003cstrong\u003eQtc 1.052 with F3 at 51.4 Hz\u003c\/strong\u003e. The \u003cstrong\u003eDMD124SH\u003c\/strong\u003e runs a Qts of 0.91 with 16.4 T and 8.8mm, and lands at \u003cstrong\u003eQtc 1.246 with F3 at 53.6 Hz\u003c\/strong\u003e. System Qtc can never fall below the driver's own Qts in a sealed enclosure, so at a free-air Qts of 0.91 the D4 is underdamped in any sealed box regardless of volume. It is not a bad driver: it carries the stronger motor and the longer excursion. For sealed use the D2 is the better performer, and it is not close.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eWhere These Numbers Come From\u003c\/h3\u003e\n\u003cp\u003eThe Qtc and F3 figures above are \u003cstrong\u003ecomputed from the Thiele-Small parameters Diamond publishes\u003c\/strong\u003e, and they will not match the numbers printed in Diamond's enclosure table. Diamond lists the DMD122SH at Qtc 0.91 in 0.75 cubic feet. Run their own published Qts of 0.77 and Vas of 30.7 liters through standard sealed box math at that volume and the result is 1.20. Every variant is off in the same direction by roughly 0.2 to 0.3. That gap is too large to be a gross versus net convention issue; their T\/S table and their enclosure table appear to have been produced independently. We publish what the driver data actually gives.\u003c\/p\u003e\n\u003cp\u003eOne limitation worth stating plainly: free-air resonance is 46.0 Hz on the D2 and 46.5 Hz on the D4. A sealed box raises the system corner above the driver's Fs, so F3 sits in the low 50s regardless of volume. This is a punch and midbass driver in a shallow package, not a deep extension driver. Firing down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz, and in-car response extends well below the anechoic figure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance behind the cone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e3 Inch Mounting Depth\u003c\/h4\u003e\n\u003cp\u003eCabinet height here is set by the airspace, not by the driver. At \u003cstrong\u003e8.3125 inches\u003c\/strong\u003e tall the box carries 1.25 cubic feet under a 12.83 inch driver on a 30 by 15 footprint, with perimeter cross-bracing across the long panels and polyfill pre-installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eDiamond rates the DMD-SH 12 at \u003cstrong\u003e300 watts RMS and 600 watts maximum\u003c\/strong\u003e. Both coil variants are dual voice coil, so you set final impedance at the driver: series or parallel, 2 ohm or 4 ohm coils, whichever your amplifier is stable into.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own DMD122SH or DMD124SH; the driver is purchased separately. Cutout and mounting depth are a direct fit for either version.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eEvery Performance Optimized cabinet is machined to one driver's cutout, mounting depth and displacement, then built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540389818457,"sku":"PO 12-S DF DMD","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-dual-15-sealed-enclosure-built-for-resonix-gus-15subwoofer-enclosuresproline-x-9360178_0b88275c-e62b-4739-aae8-d4220e4e6a14.jpg?v=1787112325"},{"product_id":"performance-optimized-down-fire-sealed-dual-10-enclosure-diamond-audio-dmd-sh","title":"Performance Optimized Down Fire Sealed Dual 10\" Enclosure | Diamond Audio 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class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire Dual 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of Diamond Audio DMD-SH 10s\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.60 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eSeparate Chambers\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.60\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net total\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.981\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e52.4 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff, D4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e10.125 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Diamond Audio DMD-SH 10's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around a Pair of DMD-SH 10s\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. Both baffle positions are bored to the driver's \u003cstrong\u003e9.13 inch cutout\u003c\/strong\u003e, the internal height is set by its \u003cstrong\u003e3.00 inch mounting depth\u003c\/strong\u003e, and the two driver positions sit side by side on a 30 by 15 inch footprint. The finished cabinet stands 10.125 inches tall measured in the down fire position, which makes it a cargo floor or rear wall build rather than an under seat one.\u003c\/p\u003e\n\u003cp\u003eEach DMD-SH is a shallow mount design: an aluminum heatsink dust cap over a high strength paper cone, a die-cast shallow frame, a vented pole for cooler operation, oversized push terminals, a black spider with woven tinsel leads, and a wrap-around ABS mounting gasket. Diamond states that the motor and suspension symmetry are \u003cstrong\u003eKlippel optimized\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe two coil variants sit further apart than most dual impedance pairs. The \u003cstrong\u003eDMD102SH\u003c\/strong\u003e, dual 2 ohm, runs a Qts of 0.66 with 13.7 T of motor force and 7.9mm of Xmax. The \u003cstrong\u003eDMD104SH\u003c\/strong\u003e, dual 4 ohm, runs a Qts of 0.77 with 16.4 T and 8.8mm. Buy a matched pair and wire both drivers identically, since mismatched wiring between chambers splits power unevenly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eTotal internal gross volume is 1.646 cubic feet, split by the divider into \u003cstrong\u003e0.80 cubic feet net per driver, 1.60 cubic feet net total\u003c\/strong\u003e. That is the same per driver alignment as the single driver cabinet, so this is identical character with twice the cone area behind it and roughly 6 dB more maximum output.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eEach chamber is larger than Diamond's suggested 0.45 cubic feet per driver, a figure that puts the D2 near Qtc 0.98 and the D4 above 1.14, both underdamped. At 0.80 net per chamber the \u003cstrong\u003eDMD104SH lands at Qtc 0.981 with F3 at 52.4 Hz\u003c\/strong\u003e and the \u003cstrong\u003eDMD102SH at Qtc 0.856\u003c\/strong\u003e, with 2 to 3 Hz more extension than Diamond's own volume gives. Their manual presents its enclosure table as a suggestion rather than a specification.\u003c\/p\u003e\n\u003cp\u003eThese figures are computed from the Thiele-Small parameters Diamond publishes, and they do not match the Qtc values printed in Diamond's enclosure table, which run lower by roughly 0.2 to 0.3 across every variant. No gross versus net convention closes a gap that size, so we publish the figure that follows from the driver data. Free-air resonance is 48.0 Hz on the D2 and 48.5 Hz on the D4, which is why F3 lands in the low 50s in any sealed volume.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e at both driver positions, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so each driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance. Two sets of 8\/32 threaded inserts and stainless machine screws are included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eOne shared Proline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e to both driver positions in parallel. Side mounted so it stays accessible with the baffles facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSeparate Chambers\u003c\/h4\u003e\n\u003cp\u003eA \u003cstrong\u003efull height 3\/4 inch MDF divider\u003c\/strong\u003e is bonded in, giving each driver its own sealed 0.80 cubic feet and its own polyfill. Perimeter cross-bracing ties the long spans together on both sides of the divider.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eWhy Two Chambers, Not One\u003c\/h3\u003e\n\u003cp\u003eSeparate chambers are the standing design rule on every Proline X dual sealed enclosure. Two drivers sharing one sealed volume interact acoustically: each driver's compression phase becomes the pressure environment the other is working against, which smears transient response and blurs the alignment either driver would have on its own.\u003c\/p\u003e\n\u003cp\u003eA full height bonded divider removes that interaction. Each DMD-SH gets its own dedicated airspace, its own damping, and its own clean sealed alignment. The cost is one panel and a fraction of a cubic foot; the benefit is that the pair behaves like two correct single driver cabinets sharing a footprint.\u003c\/p\u003e\n\u003cp\u003eBoth drivers fire downward into the floor and the cabinet couples to the surface it sits on. No standoffs are required. The sealed rolloff meets rising cabin gain below 60 Hz, so in-car response extends well below the anechoic figures quoted above.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eEach DMD-SH 10 is rated \u003cstrong\u003e250 watts RMS and 500 watts maximum\u003c\/strong\u003e, so the pair takes 500 watts RMS combined. Both variants are dual voice coil and the single cup feeds both positions in parallel, so the final load is set at the drivers. Wire the two identically and confirm the result against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own pair of DMD102SH or DMD104SH; the drivers are purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eTwo chambers, two alignments worked out from the published parameters instead of a table of round numbers, one footprint. Machined, assembled and inspected one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540390015065,"sku":"PO 10D-S DF DMD","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-dual-15-sealed-enclosure-built-for-resonix-gus-15subwoofer-enclosuresproline-x-9360178_968b3f85-0b2b-4975-b7eb-6d1578b5dbdd.jpg?v=1787112326"},{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-hertz-mille-pro-mps-250","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Hertz Mille Pro MPS 250","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Hertz Mille Pro MPS 250\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.51 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eAmong The Shortest In The Line\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.51\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.754\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, S4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e42.9 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff, S4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e4.9375 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Hertz Mille Pro MPS 250's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the MPS 250\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the Hertz \u003cstrong\u003e232mm cutout\u003c\/strong\u003e, which is 9.13 inches, and the internal height is set by the driver's \u003cstrong\u003e3.25 inch mounting depth\u003c\/strong\u003e. The finished cabinet stands \u003cstrong\u003e4.9375 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint, measured in the down fire position. That is one of the shortest cabinets in the Proline X Down Fire line, and it fits under seats where almost nothing else will go.\u003c\/p\u003e\n\u003cp\u003eThe headline number on this driver is \u003cstrong\u003e16.8mm of Xmax\u003c\/strong\u003e, which is exceptional for a shallow mount 10. It comes from a polypropylene cone on a 38mm voice coil with a high density flux ferrite motor, rated 500 watts RMS and 1000 watts peak. Hertz includes a mesh grille in the box that can be rotated 90 degrees or removed entirely.\u003c\/p\u003e\n\u003cp\u003eBoth coil options are single voice coil, so impedance is fixed by the model you buy: 2 ohms on the \u003cstrong\u003eMPS 250 S2\u003c\/strong\u003e, 4 ohms on the \u003cstrong\u003eMPS 250 S4\u003c\/strong\u003e. There is no wiring decision at the driver. Hertz publishes its Thiele-Small measured with coils in parallel and states that Fs, Vas and Qts are unchanged in series wiring, with only Re, Le and BL moving, so one cabinet is correct either way.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.51 cubic feet net\u003c\/strong\u003e out of 0.58 cubic feet gross, which matches Hertz's own sealed recommendation of 14.2 liters. There is no argument with the manufacturer to have here: the volume they ask for is the volume the cabinet holds after panel thickness, bracing and driver displacement are accounted for.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eNote which coil is which here, because it is counterintuitive. On the MPS 250 the \u003cstrong\u003eS2 is the better damped driver\u003c\/strong\u003e, with a free-air Qts of 0.41 against the S4's 0.48. In this volume the S2 lands at \u003cstrong\u003eQtc 0.673 with F3 at 48.4 Hz\u003c\/strong\u003e and the S4 at \u003cstrong\u003eQtc 0.754 with F3 at 42.9 Hz\u003c\/strong\u003e. So the S2 is the tighter alignment and the S4 reaches lower and carries more motor force, 17.3 T·m against 14.7. That pattern reverses on the 12 inch MPS 300, where the S4 is the tighter of the pair, so do not assume it carries across sizes.\u003c\/p\u003e\n\u003cp\u003eWorth saying plainly: \u003cstrong\u003eHertz's published enclosure data reconciles with its own T\/S parameters.\u003c\/strong\u003e Running their Qts and Vas through standard sealed box math at their recommended volume lands within 0.03 of the Qtc they print. That is not true of every manufacturer in this category, and it means the numbers on this page and the numbers in the Hertz manual are the same numbers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance, which matters on a cabinet under five inches tall.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Bracing\u003c\/h4\u003e\n\u003cp\u003ePerimeter cross-bracing ties the long spans together on a wide, shallow cabinet where panel area is the main resonance risk. Polyfill is pre-installed and the driver mounts into 8\/32 threaded inserts with stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Firing Into the Floor\u003c\/h3\u003e\n\u003cp\u003eThe driver fires downward into the floor and the cabinet couples to the surface it sits on. No standoffs are required; the cabinet sits flat. The sealed rolloff meets rising cabin gain below 60 Hz, so in-car response extends well below the anechoic figures quoted above.\u003c\/p\u003e\n\u003cp\u003eFor sealed applications Hertz suggests a \u003cstrong\u003e15 Hz subsonic filter at 24 dB per octave\u003c\/strong\u003e and a 70 to 80 Hz low pass, also at 24 dB per octave. Those are the manufacturer's own recommended settings for this driver.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eThe MPS 250 is rated \u003cstrong\u003e500 watts RMS and 1000 watts peak\u003c\/strong\u003e on a 38mm voice coil. Since both models are single voice coil, the load your amplifier sees is decided when you choose the S2 or the S4. Check what your amplifier is stable into before you order the driver.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own MPS 250 S2 or MPS 250 S4; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eHertz asked for 14.2 liters, so that is what this cabinet holds, in the shortest package that will take the driver. Machined, assembled and inspected one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540397977689,"sku":"PO 10-S DF MPS","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10-SDFMPSInternal.jpg?v=1787383175"},{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-hertz-mille-pro-mps-300","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Hertz Mille Pro MPS 300","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Hertz Mille Pro MPS 300\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.80 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e16.8mm Xmax\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.80\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.812\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, S4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e39.5 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff, S4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e6.375 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Hertz Mille Pro MPS 300's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the MPS 300\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the Hertz \u003cstrong\u003e283mm cutout\u003c\/strong\u003e, which is 11.14 inches, and the internal height is set by the driver's \u003cstrong\u003e3.46 inch mounting depth\u003c\/strong\u003e. The result is a full 12 in a cabinet that stands \u003cstrong\u003e6.375 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint, measured in the down fire position.\u003c\/p\u003e\n\u003cp\u003eThe MPS 300 carries \u003cstrong\u003e16.8mm of Xmax\u003c\/strong\u003e, an unusually high figure for a shallow driver, on a polypropylene cone with a 38mm voice coil and a high density flux ferrite motor. It is rated 500 watts RMS and 1000 watts peak. Hertz includes a mesh grille in the box that can be rotated 90 degrees or removed entirely.\u003c\/p\u003e\n\u003cp\u003eWhat makes this driver reach is the suspension: a \u003cstrong\u003e24 Hz free-air resonance on the S2 paired with 64.9 liters of Vas\u003c\/strong\u003e, and 23 Hz with 62.1 liters on the S4. Both models are single voice coil, so impedance is fixed by the model you buy, 2 ohms on the \u003cstrong\u003eMPS 300 S2\u003c\/strong\u003e and 4 ohms on the \u003cstrong\u003eMPS 300 S4\u003c\/strong\u003e. Hertz publishes its Thiele-Small measured with coils in parallel and states that Fs, Vas and Qts are unchanged in series wiring, with only Re, Le and BL moving, so one cabinet is correct either way.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.80 cubic feet net\u003c\/strong\u003e out of 0.89 cubic feet gross, which matches Hertz's own sealed recommendation of 22.7 liters. The volume they ask for is the volume the cabinet holds after panel thickness, bracing and driver displacement are accounted for.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003ePay attention to the coil choice, because \u003cstrong\u003eit reverses from the 10 inch MPS 250\u003c\/strong\u003e. On the MPS 300 the S4 is the better damped driver, with a free-air Qts of 0.42 against the S2's 0.51, and it carries far more motor force at 18.7 T·m against 12.3. In this volume the \u003cstrong\u003eS4 lands at Qtc 0.812 with F3 at 39.5 Hz\u003c\/strong\u003e and the \u003cstrong\u003eS2 at Qtc 1.003 with F3 at 37.1 Hz\u003c\/strong\u003e. So the S4 is the controlled alignment and the S2 reaches about 2.4 Hz deeper with a modest lift at the corner. Both are usable; if your amplifier is happy either way, take the S4 for accuracy and the S2 for extension.\u003c\/p\u003e\n\u003cp\u003eThat \u003cstrong\u003e37.1 Hz F3 on the S2 is among the deepest in the Proline X Down Fire line\u003c\/strong\u003e, which is unusual for a cabinet this short. Worth saying plainly: \u003cstrong\u003eHertz's published enclosure data reconciles with its own T\/S parameters.\u003c\/strong\u003e Running their Qts and Vas through standard sealed box math at their recommended volume lands within 0.2 Hz of the corner frequency they print on both variants. That is not true of every manufacturer in this category.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance, which is what lets a 12 live in a 6.375 inch cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePerimeter Cross-Bracing\u003c\/h4\u003e\n\u003cp\u003ePerimeter cross-bracing ties the long spans together on a wide, shallow cabinet where panel area is the main resonance risk. Polyfill is pre-installed and the driver mounts into 8\/32 threaded inserts with stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Firing Into the Floor\u003c\/h3\u003e\n\u003cp\u003eThe driver fires downward into the floor and the cabinet couples to the surface it sits on. No standoffs are required; the cabinet sits flat. The sealed rolloff meets rising cabin gain below 60 Hz, so in-car response extends well below the anechoic figures quoted above.\u003c\/p\u003e\n\u003cp\u003eFor sealed applications Hertz suggests a \u003cstrong\u003e15 Hz subsonic filter at 24 dB per octave\u003c\/strong\u003e and a 70 to 80 Hz low pass, also at 24 dB per octave. Those are the manufacturer's own recommended settings for this driver.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eThe MPS 300 is rated \u003cstrong\u003e500 watts RMS and 1000 watts peak\u003c\/strong\u003e on a 38mm voice coil. Since both models are single voice coil, the load your amplifier sees is decided when you choose the S2 or the S4. Check what your amplifier is stable into before you order the driver.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own MPS 300 S2 or MPS 300 S4; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eHertz asked for 22.7 liters, so that is what this cabinet holds, in the shortest package that will take a 12 inch driver. Machined, assembled and inspected one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540398043225,"sku":"PO 12-S DF MPS","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12-SDFMPSFront.jpg?v=1787383490"},{"product_id":"performance-optimized-down-fire-sealed-dual-10-enclosure-hertz-mille-pro-mps-250","title":"Performance Optimized Down Fire Sealed Dual 10\" Enclosure | Hertz Mille Pro MPS 250","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire Dual 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of Hertz Mille Pro MPS 250\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.00 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eSeparate Chambers\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.00\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net total\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.754\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, S4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e42.9 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e7.6875 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Hertz Mille Pro MPS 250's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around a Pair of MPS 250s\u003c\/h3\u003e\n\u003cp\u003eBoth baffles are bored to the MPS 250's \u003cstrong\u003e232mm cutout\u003c\/strong\u003e, 9.13 inches, and the internal height is set by the driver's \u003cstrong\u003e3.25 inch mounting depth\u003c\/strong\u003e. The cabinet stands \u003cstrong\u003e7.6875 inches tall\u003c\/strong\u003e on the same 30 by 15 inch footprint as the single, and delivers roughly 6 dB more maximum output than one driver in the same alignment.\u003c\/p\u003e\n\u003cp\u003eEach MPS 250 carries \u003cstrong\u003e16.8mm of one way Xmax\u003c\/strong\u003e behind a 38mm voice coil and a high density flux ferrite motor, with a polypropylene cone. That is exceptional travel for a shallow 10, and two of them move a serious amount of air from a cabinet under 8 inches tall. Power handling is 500 watts RMS and 1000 watts peak per driver, \u003cstrong\u003e1000 watts RMS across the pair\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eEach driver is sold as the MPS 250 S2 at 2 ohms or the MPS 250 S4 at 4 ohms, both single voice coil. Use two of the same model. Mismatched drivers between the two chambers will not track each other.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eEach chamber is built at \u003cstrong\u003e0.50 cubic feet net per driver\u003c\/strong\u003e, \u003cstrong\u003e1.00 cubic foot net total\u003c\/strong\u003e, out of a 1.14 cubic foot gross cavity. That per driver figure matches Hertz's own sealed recommendation of 14.2 liters, so each chamber lands on the same alignment as the single driver cabinet: Qtc 0.673 with F3 at 48.4 Hz on the S2, or Qtc 0.754 with F3 at 42.9 Hz on the S4.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eNote which coil is which, because it is counterintuitive. On the MPS 250 the \u003cstrong\u003eS2 is the better damped driver\u003c\/strong\u003e, with a free air Qts of 0.41 against the S4's 0.48. The S4 reaches lower and carries more motor force, 17.3 T·m against 14.7. That pattern reverses on the 12 inch MPS 300, so do not assume it carries across sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eTwo Chambers, Not One Volume\u003c\/h3\u003e\n\u003cp\u003eThis enclosure follows the Proline X standing design rule for dual sealed builds: \u003cstrong\u003etwo fully separate chambers\u003c\/strong\u003e divided by a bonded full height 3\/4 inch MDF panel, giving each driver its own dedicated airspace and its own polyfill.\u003c\/p\u003e\n\u003cp\u003eTwo drivers sharing one sealed volume interact acoustically. Each driver's compression phase becomes the pressure environment the other is working against, which smears transient response and blurs the alignment each would have on its own. A full divider eliminates that entirely, and each MPS 250 sees exactly the 0.50 cubic feet Hertz specifies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps both chambers airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eBoth front baffles are \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so each driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance at each position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eOne\u003c\/strong\u003e Proline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals serves both chambers, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e to both driver positions in parallel. Side mounted so it stays accessible with the baffles facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSeparate Chambers\u003c\/h4\u003e\n\u003cp\u003eA \u003cstrong\u003efull height bonded 3\/4 inch MDF divider\u003c\/strong\u003e splits the cabinet into two sealed chambers of 0.50 cubic feet net each. Perimeter cross-bracing, polyfill in each chamber, and two sets of 8\/32 threaded inserts with stainless machine screws.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eEach driver is rated \u003cstrong\u003e500 watts RMS and 1000 watts peak\u003c\/strong\u003e, \u003cstrong\u003e1000 watts RMS combined\u003c\/strong\u003e. Both models are single voice coil, so there is no coil wiring decision at the driver; your final load is set by which model you install and how the pair resolves at the amplifier. Confirm that against your amplifier's minimum stable load before powering up.\u003c\/p\u003e\n\u003cp\u003eHertz publishes Thiele-Small measured with coils in parallel and states that Fs, Vas and Qts are identical in series wiring, and their published enclosure data reconciles with their own T\/S parameters, which is not true of every manufacturer in this category. Firing down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz. Hertz suggests a 15 Hz subsonic filter at 24 dB per octave and a 70 to 80 Hz low pass for sealed applications.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own pair of MPS 250 S2 or MPS 250 S4; the drivers are purchased separately. Assembled and inspected in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eOne cutout, one mounting depth, one published airspace per chamber. Every Performance Optimized cabinet is machined to a single driver's numbers and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540398108761,"sku":"PO 10D-S DF MPS","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10D-SDFMPSInternal.jpg?v=1787383820"},{"product_id":"performance-optimized-down-fire-sealed-dual-12-enclosure-hertz-mille-pro-mps-300","title":"Performance Optimized Down Fire Sealed Dual 12\" Enclosure | Hertz Mille Pro MPS 300","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#d99058;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire Dual 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of Hertz Mille Pro MPS 300\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.60 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eSeparate Chambers\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.60\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net total\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.812\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, S4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e39.5 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e10.75 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Hertz Mille Pro MPS 300's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around a Pair of MPS 300s\u003c\/h3\u003e\n\u003cp\u003eBoth baffles are bored to the MPS 300's \u003cstrong\u003e283mm cutout\u003c\/strong\u003e, 11.14 inches, and the internal height is set by the driver's \u003cstrong\u003e3.46 inch mounting depth\u003c\/strong\u003e. The cabinet stands \u003cstrong\u003e10.75 inches tall\u003c\/strong\u003e on the standard 30 by 15 inch footprint, and delivers roughly 6 dB more maximum output than a single driver in the same alignment.\u003c\/p\u003e\n\u003cp\u003eEach MPS 300 carries \u003cstrong\u003e16.8mm of one way Xmax\u003c\/strong\u003e behind a 38mm voice coil and a high density flux ferrite motor, with a polypropylene cone. Power handling is 500 watts RMS and 1000 watts peak per driver, \u003cstrong\u003e1000 watts RMS across the pair\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eAt 37.1 Hz per driver on the S2, this is among the deepest reaching enclosures in the Proline X Down Fire line, and here you get it twice. That depth comes from a \u003cstrong\u003e24 Hz free air resonance paired with a 64.9 liter Vas\u003c\/strong\u003e in a driver that mounts in 3.46 inches. Each driver is sold as the MPS 300 S2 at 2 ohms or the MPS 300 S4 at 4 ohms, both single voice coil. Use two of the same model; mismatched drivers between the two chambers will not track each other.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eEach chamber is built at \u003cstrong\u003e0.80 cubic feet net per driver\u003c\/strong\u003e, \u003cstrong\u003e1.60 cubic feet net total\u003c\/strong\u003e, out of a 1.78 cubic foot gross cavity. That per driver figure matches Hertz's own sealed recommendation of 22.7 liters, so each chamber lands on the same alignment as the single driver cabinet: Qtc 1.003 with F3 at 37.1 Hz on the S2, or Qtc 0.812 with F3 at 39.5 Hz on the S4.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003ePay attention to the coil choice, because \u003cstrong\u003eit reverses from the 10 inch model\u003c\/strong\u003e. On the MPS 300 the S4 is the better damped driver, with a free air Qts of 0.42 against the S2's 0.51, and it carries far more motor force, 18.7 T·m against 12.3. The S4 gives the more controlled alignment; the S2 reaches roughly 2.4 Hz lower. On the MPS 250 the pattern is the opposite. Same series, reversed between sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eTwo Chambers, Not One Volume\u003c\/h3\u003e\n\u003cp\u003eThis enclosure follows the Proline X standing design rule for dual sealed builds: \u003cstrong\u003etwo fully separate chambers\u003c\/strong\u003e divided by a bonded full height 3\/4 inch MDF panel, giving each driver its own dedicated airspace and its own polyfill.\u003c\/p\u003e\n\u003cp\u003eTwo drivers sharing one sealed volume interact acoustically. Each driver's compression phase becomes the pressure environment the other is working against, which smears transient response and blurs the alignment each would have on its own. A full divider eliminates that entirely, and each MPS 300 sees exactly the 0.80 cubic feet Hertz specifies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps both chambers airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cp\u003eBe realistic about size. At 10.75 inches this is the tallest cabinet in the Down Fire program. It is a cargo floor, rear wall or behind the bench build rather than an under seat one. The 30 by 15 inch footprint is unchanged, so it takes no more floor area than any other Down Fire cabinet, it simply stands taller to give each driver its full 0.80 cubic feet. Measure your vertical clearance before ordering.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eBoth front baffles are \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so each driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance at each position, and it matters with two 11 inch cutouts in one cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eOne\u003c\/strong\u003e Proline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals serves both chambers, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e to both driver positions in parallel. Side mounted so it stays accessible with the baffles facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSeparate Chambers\u003c\/h4\u003e\n\u003cp\u003eA \u003cstrong\u003efull height bonded 3\/4 inch MDF divider\u003c\/strong\u003e splits the cabinet into two sealed chambers of 0.80 cubic feet net each. Perimeter cross-bracing, polyfill in each chamber, and two sets of 8\/32 threaded inserts with stainless machine screws.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eEach driver is rated \u003cstrong\u003e500 watts RMS and 1000 watts peak\u003c\/strong\u003e, \u003cstrong\u003e1000 watts RMS combined\u003c\/strong\u003e. Both models are single voice coil, so there is no coil wiring decision at the driver; your final load is set by which model you install and how the pair resolves at the amplifier. Confirm that against your amplifier's minimum stable load before powering up.\u003c\/p\u003e\n\u003cp\u003eHertz publishes Thiele-Small measured with coils in parallel and states that Fs, Vas and Qts are identical in series wiring, and their published enclosure data reconciles with their own T\/S parameters, which is not true of every manufacturer in this category. Firing down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz. Hertz suggests a 15 Hz subsonic filter at 24 dB per octave and a 70 to 80 Hz low pass for sealed applications.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own pair of MPS 300 S2 or MPS 300 S4; the drivers are purchased separately. Assembled and inspected in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eOne cutout, one mounting depth, one published airspace per chamber. Every Performance Optimized cabinet is machined to a single driver's numbers and built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540398174297,"sku":"PO 12D-S DF MPS","price":319.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12D-SDFMPSFaceDown.jpg?v=1787384028"},{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-focal-flax-evo-p-25-fse","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Focal Flax Evo P 25 FSE","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Focal Flax Evo P 25 FSE\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.80 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eFlax Fiber Cone\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.80\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.131\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.6 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e6.125 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Focal Flax Evo P 25 FSE's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Focal P 25 FSE\u003c\/h3\u003e\n\u003cp\u003eThe baffle is bored for the P 25 FSE's \u003cstrong\u003e260mm, 10.24 inch\u003c\/strong\u003e frame and the cavity is machined to 0.80 cubic feet net around it. The finished cabinet stands 6.125 inches tall on a 30 by 15 inch footprint, measured in the down fire position, which fits under seats and in cargo wells that will not accept a conventional box.\u003c\/p\u003e\n\u003cp\u003eThe P 25 FSE is a \u003cstrong\u003e4 ohm single voice coil\u003c\/strong\u003e driver rated 280 watts RMS and 560 watts maximum, with 11mm of Xmax across 346 cm² of cone area. The construction is what separates Focal from the rest of this category: a \u003cstrong\u003eflax fiber cone\u003c\/strong\u003e in their Flax Evo layup, a rubber surround, and a 38mm four-layer copper voice coil on a glass fiber former.\u003c\/p\u003e\n\u003cp\u003eFlax is Focal's alternative to the polypropylene and treated paper used elsewhere in this class. The appeal is stiffness relative to mass combined with good internal damping, which helps a cone hold its shape under load without ringing. Focal has been refining the material across their range for years, and Flax Evo is the current version of it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eThe machined cavity measures \u003cstrong\u003e0.87 cubic feet gross\u003c\/strong\u003e. Focal publishes driver displacement at \u003cstrong\u003e0.07 cubic feet\u003c\/strong\u003e, which many manufacturers in this category omit entirely, so the net figure here is subtracted rather than estimated. The working airspace is \u003cstrong\u003e0.80 cubic feet net\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eBuilding larger changes very little. The driver's free-air Qts is 0.78, and system Qtc can never fall below the driver's Qts in any sealed enclosure, so this one is mildly underdamped no matter what you build. At 0.80 net it lands at \u003cstrong\u003eQtc 1.131 with F3 at 32.6 Hz\u003c\/strong\u003e, which produces a modest lift near the corner frequency. Going to a full cubic foot buys roughly one hertz of extension, which does not justify the extra cabinet height on an enclosure designed to fit under a seat. This driver is single voice coil, so there is no coil variant to choose between and no wiring decision at the driver.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eWhere Focal's Published Numbers Disagree\u003c\/h3\u003e\n\u003cp\u003eThe alignment figures above are \u003cstrong\u003ecomputed from the Thiele-Small parameters Focal publishes\u003c\/strong\u003e, Fs 30 Hz, Qts 0.78 and Vas 25 liters. They do not match the F3 values in Focal's suggested application table. That table lists 37.5 Hz at 12 liters and 34 Hz at 18 liters. Running Focal's own Qts and Vas through standard sealed box math at those same volumes gives roughly 49 and 46 Hz instead.\u003c\/p\u003e\n\u003cp\u003eThe deciding evidence is on the same technical sheet. \u003cstrong\u003eFocal's own published frequency response graph agrees with the computed figures\u003c\/strong\u003e rather than with the application table, showing output rolling away below roughly 45 Hz. Two of Focal's three data sources agree with each other and only the application table is the outlier, so we publish what the driver data and the measured response both indicate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSingle Cup, 4 Ohm Load\u003c\/h4\u003e\n\u003cp\u003eOne side mounted cup, pre-wired in 12 gauge OFC, presenting the driver's 4 ohm nominal load straight to the amplifier. No series or parallel decision to make. A perimeter cross-brace ties the long spans together and polyfill is pre-installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eFocal rates the P 25 FSE at \u003cstrong\u003e280 watts RMS with 560 watts maximum\u003c\/strong\u003e. Target 200 to 280 watts RMS of clean, unclipped power. Confirm your amplifier is comfortable at a 4 ohm load and set your gain to the 280 watt rating.\u003c\/p\u003e\n\u003cp\u003eDrivers mount to 8\/32 threaded inserts with stainless machine screws, included. The enclosure carries a 1 year limited warranty. Bring your own Focal Flax Evo P 25 FSE; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eOne driver, one volume, one set of machine files. Cut, assembled and inspected one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540414885977,"sku":"PO 10-S DF FSE","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10-SDFFSEFaceDown.jpg?v=1787382772"},{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-morel-ultimo-powerslim-ps104d","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Morel Ultimo PowerSlim PS104D","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#d99058;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Morel Ultimo PowerSlim PS104D\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.50 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e700W In 3.1 Inches\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.50\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.164\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.9 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e4.9375 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Morel Ultimo PowerSlim PS104D's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Morel PS104D\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the PS104D's \u003cstrong\u003e9.1 inch cutout\u003c\/strong\u003e, 231.5mm to Morel's spec, and the internal height is set by the driver's \u003cstrong\u003e3.1 inch mounting depth\u003c\/strong\u003e. The finished cabinet stands \u003cstrong\u003e4.9375 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint, measured in the down fire position, which fits under seats and in cargo wells that will not accept a conventional box.\u003c\/p\u003e\n\u003cp\u003eThe PS104D is a \u003cstrong\u003edual 4 ohm voice coil\u003c\/strong\u003e driver rated 700 watts RMS with 1800 watts maximum transient handling, working 346.4 square centimeters of cone with 11mm of Xmax in each direction. Free-air resonance is 29.1 Hz against a 25 liter Vas, and the motor is a double magnet EVC system behind a flat honeycomb Hexatech aluminium cone.\u003c\/p\u003e\n\u003cp\u003eWhat lets it take that much power in that little depth is the voice coil. Morel winds a \u003cstrong\u003e129.5mm coil\u003c\/strong\u003e, 5.1 inches, in four layers of carbon on an aluminium former. Most shallow 10s run a 2 to 2.5 inch coil, so this is more than twice the diameter and far more surface area to shed heat, which is what sets a continuous rating. The Ultimo PowerSlim series took the EISA Best In-Car Subwoofer award for 2023-2024.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eThe machined cavity measures \u003cstrong\u003e0.57 cubic feet gross\u003c\/strong\u003e. After the driver's own displacement the working airspace is \u003cstrong\u003e0.50 cubic feet net\u003c\/strong\u003e, which is Morel's published sealed recommendation of 12.7 liters.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eIn that volume the driver lands at \u003cstrong\u003eQtc 1.164 with a predicted F3 of 35.9 Hz\u003c\/strong\u003e, computed from Morel's published Fs of 29.1 Hz, Qts of 0.7 and Vas of 25 liters. Morel publishes 42 Hz at this volume.\u003c\/p\u003e\n\u003cp\u003eQts is 0.7, so system Qtc cannot fall below 0.7 in any sealed enclosure regardless of volume. The alignment here sits just above unity with a modest lift near the corner frequency. That is the driver's intended character, and Morel built their volume recommendation around it. Both coils are 4 ohm, so the wiring decision is made at the driver rather than by the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e700 Watts In 3.1 Inches\u003c\/h4\u003e\n\u003cp\u003eThe driver bolts through \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e set into the 1.5 inch baffle, so a 700 watt driver lands on stainless hardware rather than raw MDF. A perimeter cross-brace ties the long spans together and polyfill is pre-installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eMorel rates the PS104D at \u003cstrong\u003e700 watts RMS\u003c\/strong\u003e with 1800 watts maximum transient handling, and publishes a recommended range of 350 to 700 watts RMS. Set gains inside that range.\u003c\/p\u003e\n\u003cp\u003eThe coils are dual 4 ohm, so you set the final load at the driver: two coils in parallel for 2 ohms, in series for 8 ohms. Confirm your amplifier is stable at the load you choose.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own Morel Ultimo PowerSlim PS104D; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eEvery Performance Optimized cabinet is cut to one driver's cutout, mounting depth and displacement, then built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540421570649,"sku":"PO 10-S DF PS","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10-SDFPSInternal.jpg?v=1787536111"},{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-morel-ultimo-powerslim-ps124d","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Morel Ultimo PowerSlim PS124D","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica 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10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#3d2412;color:#e8b98d}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(184,115,51,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the Morel Ultimo PowerSlim PS124D\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e0.80 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eDeepest Single Driver In The Line\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.80\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.070\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.7 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e6.375 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Morel Ultimo PowerSlim PS124D's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the Morel PS124D\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is bored to the PS124D's \u003cstrong\u003e10.6 inch cutout\u003c\/strong\u003e, 268.6mm to Morel's spec, and the internal height is set by the driver's \u003cstrong\u003e3.4 inch mounting depth\u003c\/strong\u003e. The finished cabinet stands \u003cstrong\u003e6.375 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint, which puts a full 12 under a seat or behind a row.\u003c\/p\u003e\n\u003cp\u003eThe two numbers that matter most here are resonance and compliance. \u003cstrong\u003eFs is 24 Hz against a 49.4 liter Vas\u003c\/strong\u003e, and for a driver that mounts in 3.4 inches that pairing is unusual. Most shallow 12s sit in the low 30s for free-air resonance, which caps how low they go regardless of the box. This one reaches conventional driver territory in a shallow frame, and that is what produces the \u003cstrong\u003e34.2 Hz predicted F3\u003c\/strong\u003e in this cabinet, the deepest single driver figure in the Down Fire program.\u003c\/p\u003e\n\u003cp\u003eThe rest of the driver follows the same pattern. Flat honeycomb Hexatech aluminium cone, double magnet EVC motor system, and a \u003cstrong\u003e129.5mm voice coil\u003c\/strong\u003e, 5.1 inches, wound in four layers of carbon on an aluminium former. Most shallow 12s run a 2 to 3 inch coil. Nearly double the diameter gives far more surface area to shed heat, which is what sets continuous power handling and why this driver carries \u003cstrong\u003e700 watts RMS\u003c\/strong\u003e at 3.4 inches deep. The Ultimo PowerSlim series took the EISA Best In-Car Subwoofer award for 2023-2024.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.80 cubic feet net\u003c\/strong\u003e out of 0.89 gross, matching Morel's own sealed recommendation of 22.7 liters. In that volume the driver lands at \u003cstrong\u003eQtc 1.070 with a predicted F3 of 34.2 Hz\u003c\/strong\u003e, computed from Morel's published Fs of 24 Hz, Qts of 0.6 and Vas of 49.4 liters. Morel publishes 36 Hz for this volume, so their data and ours agree inside about 2 Hz, which is closer agreement than most manuals in this category manage.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eQts is 0.6, so system Qtc cannot fall below 0.6 in any sealed enclosure regardless of volume. At Morel's recommended airspace the alignment sits just under unity with a modest lift near the corner frequency. That is the driver's intended character, and Morel built their recommendation around it.\u003c\/p\u003e\n\u003cp\u003eAgainst the 10 inch PowerSlim cabinet, 1.4375 inches of extra height buys roughly 11 Hz of extension: 34.2 Hz here against 44.9 Hz there. Mounting depth is nearly identical at 3.4 inches versus 3.1. If the vertical clearance allows 6.375 inches, build the 12.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eThe front baffle is \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so the driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced For A 10.6 Inch Cutout\u003c\/h4\u003e\n\u003cp\u003eA \u003cstrong\u003e10.6 inch\u003c\/strong\u003e hole takes real material out of the baffle, so the panel is cross-braced around the perimeter and the driver bolts through 8\/32 threaded inserts. Polyfill is pre-installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eFiring Into the Floor\u003c\/h3\u003e\n\u003cp\u003eThe driver fires down into the floor and the cabinet couples to it. Sealed rolloff meets rising cabin gain below 60 Hz, so in-car response extends well below the anechoic figure, and this driver starts from the lowest anechoic figure in the line. All external dimensions are measured in the down fire position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eMorel rates the PS124D at \u003cstrong\u003e700 watts RMS\u003c\/strong\u003e with 2100 watts maximum transient handling, and publishes a recommended range of 350 to 700 watts RMS. Set gains inside that range.\u003c\/p\u003e\n\u003cp\u003eThe coils are dual 4 ohm, so you set the final load at the driver: two coils in parallel for 2 ohms, in series for 8 ohms. Most single driver builds run the 2 ohm configuration. Confirm your amplifier is stable at the load you choose.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own Morel Ultimo PowerSlim PS124D; the driver is purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eEvery Performance Optimized cabinet is cut to one driver's cutout, mounting depth and displacement, then built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540421636185,"sku":"PO 12-S DF PS","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12-SDFPSFaceDown.jpg?v=1787536498"},{"product_id":"performance-optimized-down-fire-sealed-dual-10-enclosure-morel-ultimo-powerslim-ps104d","title":"Performance Optimized Down Fire Sealed Dual 10\" Enclosure | Morel Ultimo PowerSlim PS104D","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica 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class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire Dual 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of Morel Ultimo PowerSlim PS104D\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e1.00 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eSeparate Chambers\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.00\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net total\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.164\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc per chamber\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.9 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e7.6875 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePerformance, Performance Optimized, and Micro\u003c\/h3\u003e\n\u003cp\u003eProline X builds three tiers of Down Fire enclosure. The difference is not finish or materials, it is whether the cabinet was designed for a category or for a driver, and how much of the fitting work is already done for you.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e \u003c\/th\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003cth class=\"on\"\u003ePerformance Optimized\u003c\/th\u003e\n\u003cth\u003eMicro Series\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eUniversal. Accepts any subwoofer that clears the published cutout and mounting depth.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eWoofer specific. Cut for one named subwoofer, with cutout, mounting depth, magnet clearance and displacement drawn in CAD from that driver.\u003c\/td\u003e\n\u003ctd\u003eWoofer specific. Cut for one named subwoofer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSized to the driver diameter. 24.5 by 13.5 inches on the 10 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eShared 30 by 15 inch platform on most builds, with cabinet height as the variable. A few drivers need a wider or deeper platform.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint. 21.5 by 14.5 inches on the 10 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eFront baffle\u003c\/td\u003e\n\u003ctd\u003eSingle, 3\/4 inch.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eDouble, 1.5 inch, outer layer machined as a flush recess.\u003c\/td\u003e\n\u003ctd\u003eDouble, 1.5 inch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eDriver mounting\u003c\/td\u003e\n\u003ctd\u003eSolid flange. You drill your own mounting holes.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003e8\/32 threaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eJoinery\u003c\/td\u003e\n\u003ctd\u003eV-groove and dado, CNC cut.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eV-groove and dado, CNC cut, perimeter cross brace.\u003c\/td\u003e\n\u003ctd\u003eStack fab, dowel reinforced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003ePublished alignment\u003c\/td\u003e\n\u003ctd\u003eModeled Qtc profiles across a range of drivers. No single response curve.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA real predicted Qtc and F3 for that exact driver, calculated from its own Thiele-Small parameters.\u003c\/td\u003e\n\u003ctd\u003eTarget alignment described in the listing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eCarpet\u003c\/td\u003e\n\u003ctd\u003eGray standard, black optional.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003ePlush black.\u003c\/td\u003e\n\u003ctd\u003ePlush black.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"a\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year limited.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003e1 year limited.\u003c\/td\u003e\n\u003ctd\u003e2 years.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFeet ship with every tier, uninstalled on purpose.\u003c\/strong\u003e Mount them where your floor wants them for a down fire install, or leave them off and run the cabinet front firing or up firing. The orientation is yours to choose.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eThis page is a Performance Optimized enclosure.\u003c\/strong\u003e The airspace, the cutout and the cabinet height all come from the Morel Ultimo PowerSlim PS104D's own published numbers. A Performance box fits your subwoofer. A Performance Optimized box was built for it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around a Pair of PS104D\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. Both baffles are bored to the PS104D's \u003cstrong\u003e9.1 inch cutout\u003c\/strong\u003e, 231.5mm to Morel's spec, and the internal height is set by the driver's \u003cstrong\u003e3.1 inch mounting depth\u003c\/strong\u003e. The finished cabinet stands \u003cstrong\u003e7.6875 inches tall\u003c\/strong\u003e on the same 30 by 15 inch footprint as the single, and returns roughly 6 dB more maximum output in the same alignment.\u003c\/p\u003e\n\u003cp\u003eEach PS104D is a dual 4 ohm voice coil subwoofer rated \u003cstrong\u003e700 watts RMS\u003c\/strong\u003e with 1800 watts maximum transient handling. Across the pair that is \u003cstrong\u003e1400 watts RMS combined\u003c\/strong\u003e and 692.8 square centimeters of cone. Flat honeycomb Hexatech aluminium cones, double magnet EVC motors, and 129.5mm voice coils, 5.1 inches, wound in four layers of carbon on aluminium formers. Most shallow 10s run a 2 to 2.5 inch coil, and that surface area difference is why these take 700 watts apiece continuously. The Ultimo PowerSlim series took the EISA Best In-Car Subwoofer award for 2023-2024.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eTwo Chambers, Not One Volume\u003c\/h3\u003e\n\u003cp\u003eThis enclosure follows the Proline X standing rule for dual sealed builds: \u003cstrong\u003etwo fully separate chambers\u003c\/strong\u003e split by a bonded full height 3\/4 inch MDF divider, each driver in its own airspace with its own polyfill.\u003c\/p\u003e\n\u003cp\u003eTwo drivers sharing one sealed volume interact acoustically. Each driver's compression phase becomes the pressure environment the other is working against, which smears transient response and blurs the alignment either would have on its own. A full divider removes that entirely. One shared side mounted terminal cup feeds both driver positions in parallel, so the cabinet stays a single connection point.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eEach chamber is built at \u003cstrong\u003e0.50 cubic feet net per driver\u003c\/strong\u003e, \u003cstrong\u003e1.00 cubic foot net total\u003c\/strong\u003e, out of 1.14 gross. That per chamber figure is Morel's own sealed recommendation of 12.7 liters, so each driver sees exactly the alignment it would get in the single driver cabinet: \u003cstrong\u003eQtc 0.986 with a predicted F3 of 44.9 Hz\u003c\/strong\u003e, computed from Morel's published Fs 29.1 Hz, Qts 0.7 and Vas 25 liters. Morel publishes 42 Hz at this volume.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eTrue net, not marketing net.\u003c\/strong\u003e Internal volume is calculated from the machined cavity dimensions and the driver's published displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eWith a free-air Qts of 0.7, system Qtc cannot fall below 0.7 in any sealed enclosure regardless of volume. The alignment sits just under unity with a modest lift near the corner frequency, which is the PS104D's intended character. Same voicing as the single cabinet, twice the cone and twice the power handling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps both chambers airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eDouble Baffle, Flush Recess\u003c\/h4\u003e\n\u003cp\u003eBoth front baffles are \u003cstrong\u003e1.5 inches\u003c\/strong\u003e, two bonded 3\/4 inch sheets, with the outer layer machined as a flush recess so each driver bolts to the inner layer. That recovers 3\/4 inch of internal clearance at both positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eOne Proline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e to both driver positions. Side mounted so it stays accessible with the baffles facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSeparate Chambers\u003c\/h4\u003e\n\u003cp\u003eA full height \u003cstrong\u003e3\/4 inch bonded MDF divider\u003c\/strong\u003e gives each driver its own sealed 0.50 cubic feet and its own polyfill. Perimeter cross-bracing runs the cabinet, and each driver bolts through its own set of 8\/32 threaded inserts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eFiring Into the Floor\u003c\/h3\u003e\n\u003cp\u003eBoth drivers fire down into the floor and the cabinet couples to it. Sealed rolloff meets rising cabin gain below 60 Hz, so in-car response extends well below the anechoic figure. All external dimensions are measured in the down fire position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eMorel rates each PS104D at \u003cstrong\u003e700 watts RMS\u003c\/strong\u003e with 1800 watts maximum transient handling, and publishes a recommended range of 350 to 700 watts RMS per driver. Combined that is 1400 watts RMS, the highest of any dual enclosure in this program.\u003c\/p\u003e\n\u003cp\u003eEach driver carries dual 4 ohm coils, so final impedance is set at the drivers, not at the cup. \u003cstrong\u003eWire both drivers identically\u003c\/strong\u003e, since mismatched wiring between chambers splits power unevenly. Confirm the resulting load against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own pair of Morel Ultimo PowerSlim PS104D; the drivers are purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-cta\"\u003e\n\u003ch3\u003eCut for the Driver, Not the Catalog\u003c\/h3\u003e\n\u003cp\u003eEvery Performance Optimized cabinet is cut to one driver's cutout, mounting depth and displacement, then built one at a time in Tullahoma, Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540421734489,"sku":"PO 10D-S DF PS","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10D-SDFPSFront.jpg?v=1787537143"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/collections\/proline-x-downfire-series-enclosures-8594584.webp?v=1779354931","url":"https:\/\/audiointensity.com\/collections\/downfire-subwoofer-box.oembed?page=4","provider":"Audio Intensity","version":"1.0","type":"link"}