{"title":"Dual 12 Inch Subwoofer Boxes","description":"\u003cdiv class=\"ai-collection-block\"\u003e\n\u003cp\u003eDual twelves are the size most people mean when they say a dual sub box: about the cone area of a single fifteen with the faster, tighter response of two smaller drivers, in a cabinet a normal trunk still takes.\u003c\/p\u003e\n\u003cp\u003eEvery cabinet here holds two 12 inch drivers. The driver-matched cabinets are cut to the parameters of the driver they name, and the universal cabinets take any pair that clears their cutout and depth. Each listing says whether the pair shares one chamber or gets one each, and gives the net volume for the whole box.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"proline-x-p12d-s-dual-12-sealed-subwoofer-enclosure-v3","title":"Proline X P12D-S | Dual 12\" Sealed Subwoofer Enclosure | V3","description":"\u003cstyle\u003e\n .px-desc {\n font-family: 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.8;\n color: #1e293b;\n max-width: 1200px;\n margin: 0 auto;\n background: #ffffff;\n }\n\n .px-hero {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-hero .px-title {\n font-size: 2.6em;\n font-weight: 800;\n text-transform: uppercase;\n letter-spacing: 2px;\n margin: 0 0 10px 0;\n color: white;\n }\n\n .px-hero .px-subtitle {\n font-size: 1.2em;\n font-weight: 300;\n opacity: 0.9;\n margin: 0 0 30px 0;\n }\n\n .px-badges {\n display: flex;\n justify-content: center;\n flex-wrap: wrap;\n gap: 12px;\n margin-top: 20px;\n }\n\n .px-badge {\n background: rgba(6, 182, 212, 0.2);\n border: 1px solid #06b6d4;\n color: #67e8f9;\n padding: 8px 20px;\n border-radius: 20px;\n font-size: 0.9em;\n font-weight: 600;\n letter-spacing: 0.5px;\n }\n\n .px-section {\n padding: 50px 40px;\n border-bottom: 1px solid #e2e8f0;\n background: #ffffff;\n }\n\n .px-section:nth-child(even) {\n background: #f0f9ff;\n }\n\n .px-section h2 {\n color: #0e7490;\n font-size: 2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n padding-bottom: 12px;\n border-bottom: 3px solid #06b6d4;\n }\n\n .px-section h3 {\n color: #0f172a;\n font-size: 1.4em;\n font-weight: 600;\n margin: 30px 0 15px 0;\n }\n\n .px-section p {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 18px;\n }\n\n .px-section ul {\n margin: 15px 0;\n padding-left: 25px;\n }\n\n .px-section li {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 10px;\n line-height: 1.7;\n }\n\n .px-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 24px;\n margin: 30px 0;\n }\n\n .px-card {\n background: #ffffff;\n border: 1px solid #e2e8f0;\n border-top: 4px solid #06b6d4;\n border-radius: 6px;\n padding: 24px;\n }\n\n .px-card h4 {\n color: #0e7490;\n font-size: 1.15em;\n font-weight: 700;\n margin: 0 0 12px 0;\n }\n\n .px-card p {\n font-size: 1em;\n color: #475569;\n margin: 0;\n line-height: 1.7;\n }\n\n .px-highlight {\n background: #f0f9ff;\n border-left: 5px solid #06b6d4;\n padding: 24px 28px;\n margin: 28px 0;\n border-radius: 0 6px 6px 0;\n }\n\n .px-highlight h3 {\n color: #0e7490;\n margin: 0 0 12px 0;\n font-size: 1.2em;\n }\n\n .px-highlight p {\n margin-bottom: 10px;\n color: #1e293b;\n }\n\n .px-cta {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-cta h2 {\n font-size: 2.2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n color: white;\n border: none;\n padding: 0;\n }\n\n .px-cta p {\n font-size: 1.15em;\n opacity: 0.92;\n max-width: 800px;\n margin: 0 auto 20px auto;\n color: white;\n }\n\n .px-driver-link {\n display: inline-block;\n background: #f0f9ff;\n border: 2px solid #06b6d4;\n border-radius: 6px;\n padding: 16px 24px;\n margin: 10px 10px 10px 0;\n text-decoration: none;\n color: #0e7490;\n font-weight: 700;\n font-size: 1em;\n transition: all 0.2s ease;\n }\n\n .px-driver-link:hover {\n background: #06b6d4;\n color: white;\n }\n\n @media (max-width: 768px) {\n .px-hero { padding: 40px 20px; }\n .px-hero .px-title { font-size: 1.8em; }\n .px-section { padding: 30px 20px; }\n .px-section h2 { font-size: 1.6em; }\n .px-grid { grid-template-columns: 1fr; }\n .px-cta { padding: 40px 20px; }\n .px-cta h2 { font-size: 1.6em; }\n }\n\u003c\/style\u003e\n\u003cdiv class=\"px-desc\"\u003e\n\u003c!-- Hero --\u003e\n\u003cdiv class=\"px-hero\"\u003e\n\u003cp class=\"px-title\"\u003eProline X P12D-S\u003c\/p\u003e\n\u003cp class=\"px-subtitle\"\u003eDual 12\" Sealed Subwoofer Enclosure | V3\u003c\/p\u003e\n\u003cdiv class=\"px-badges\"\u003e\n\u003cspan class=\"px-badge\"\u003e2.0 ft³ Net\u003c\/span\u003e \u003cspan class=\"px-badge\"\u003eSealed Alignment\u003c\/span\u003e \u003cspan class=\"px-badge\"\u003eShared Air Space\u003c\/span\u003e \u003cspan class=\"px-badge\"\u003e7\" Max Depth\u003c\/span\u003e \u003cspan class=\"px-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e \u003cspan class=\"px-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Introduction --\u003e\n\u003cdiv class=\"px-section\"\u003e\n\u003ch2\u003eTwo 12\" Drivers. One Sealed Enclosure. Wide Soundstage, Controlled Bass.\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eProline X P12D-S\u003c\/strong\u003e is a dual 12\" sealed enclosure built for installs that need the output and soundstage width of two drivers without the depth requirement of a large single-driver ported box. At \u003cstrong\u003e2.0 ft³ net\u003c\/strong\u003e in a shared air space with heavy internal bracing, and sealed alignment, this enclosure delivers controlled, accurate bass across a presentation that no single 12\" can replicate. Two 12\" drivers in sealed alignment produce combined cone area that approaches a single 18\" driver while maintaining the transient accuracy and flat response that sealed alignment delivers.\u003c\/p\u003e\n\u003cp\u003eAt \u003cstrong\u003e28\" wide, 14.5\" tall, and 12.5\" deep\u003c\/strong\u003e, the P12D-S fits across most full-size trunk floors without the depth commitment of a single 12\" ported box or a dual 12\" ported build. The \u003cstrong\u003e7\" max mounting depth\u003c\/strong\u003e covers the majority of standard 12\" drivers. Both drivers share a single terminal cup. Both must be run at the same impedance.\u003c\/p\u003e\n\u003cp\u003eEvery panel is CNC-cut from \u003cstrong\u003eLangboard Elite MDF\u003c\/strong\u003e to exact internal volume and assembled by hand in our Tennessee facility. Finish options are Dark Gray Trunkliner or Plush Black. Shipping is included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Why Dual Sealed --\u003e\n\u003cdiv class=\"px-section\"\u003e\n\u003ch2\u003eWhy Dual 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eTwo 12\" drivers in sealed alignment is one of the most capable bass configurations available in a compact depth profile. The combined cone area approaches a single 18\" driver, but at 12.5\" deep, the P12D-S fits across a full-size trunk floor where an 18\" ported box would require an entirely custom build to accommodate. The sealed alignment preserves the transient accuracy and flat response that makes the 12\" format valuable for musical listening, applied at a combined output level that fills large vehicles and pressurizes the cabin at moderate power levels.\u003c\/p\u003e\n\u003cp\u003eThe shared 2.0 ft³ air space with heavy internal bracing provides both drivers with a larger effective acoustic load than two individual 1.0 ft³ separated chambers, the drivers interact with a combined air mass that produces a more cohesive low-frequency response across the full 28\" baffle width.\u003c\/p\u003e\n\u003cdiv class=\"px-grid\"\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eCombined Cone Area\u003c\/h4\u003e\n\u003cp\u003eTwo 12\" drivers produce combined cone area approaching a single 18\" while maintaining the transient accuracy and flat response of sealed alignment. More output than any single 12\" at any power level, in a 12.5\" deep enclosure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eCompact Depth Profile\u003c\/h4\u003e\n\u003cp\u003eAt 12.5\" deep, the P12D-S fits across full-size trunk floors where a single 12\" ported or dual 12\" ported build would require significantly more depth. The output-to-depth ratio is the strongest argument for this configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eWide Bass Presentation\u003c\/h4\u003e\n\u003cp\u003eTwo drivers spaced across a 28\" baffle produce a wider, more even low-frequency field than any single point source. Bass is distributed more evenly across the full cabin width from driver seat to passenger seat.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eShared Air Space: Cohesive Response\u003c\/h4\u003e\n\u003cp\u003eThe shared 2.0 ft³ interior with heavy internal bracing provides a larger effective acoustic load per driver than separated chambers. Both drivers work the same combined air mass for a more cohesive low-frequency response across the full 28\" baffle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Construction --\u003e\n\u003cdiv class=\"px-section\" style=\"text-align: center;\"\u003e\n\u003ch2\u003eConstruction: Shared Air Space, Maximum Bracing, Single Terminal Cup\u003c\/h2\u003e\n\u003cp\u003eThe P12D-S uses the same Langboard Elite MDF and V-groove and dado joinery construction as every enclosure in the Proline X Performance Series. The interior is a single shared air space with heavy strategic bracing throughout, not two separated chambers. Two 12\" motors in a shared air space generate significant combined pressure on every panel simultaneously. The bracing strategy on the P12D-S is calculated to control panel resonance at the output levels two 12\" drivers can produce.\u003c\/p\u003e\n\u003ch3\u003eLangboard Elite MDF, Named, Verified, Documented\u003c\/h3\u003e\n\u003cp\u003eEvery panel is cut from \u003cstrong\u003eLangboard Elite MDF: 3\/4\" (18mm)\u003c\/strong\u003e, a named, mill-documented panel stock produced in the United States. The specifications below are pulled directly from Langboard's published mill data.\u003c\/p\u003e\n\u003cdiv class=\"px-highlight\"\u003e\n\u003ch3\u003eLangboard Elite: Published Mill Data\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDensity:\u003c\/strong\u003e 48.5 lbs\/ft³, higher density means less porosity, better screw retention, and reduced resonance\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal Bond:\u003c\/strong\u003e 200 psi, resistance to delamination under sustained bass pressure cycling\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eModulus of Elasticity:\u003c\/strong\u003e 410,000 psi, panel stiffness under load; less flex means less resonance\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFace Screw Holding:\u003c\/strong\u003e 325 lbs, baffle hardware stays locked under vibration\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEdge Screw Holding:\u003c\/strong\u003e 250 lbs, joint integrity at every panel edge connection\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eV-Groove and Dado Joinery\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"Pre Assembly showing dados and vcuts\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/P12D-S_III_Pre_Assembly.jpg?v=1742876131\" style=\"margin-bottom: 25px; float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003eEvery panel joint uses \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, CNC-cut interlocking grooves that mechanically lock panels before adhesive is applied. On an enclosure spanning 28\" wide with two 12\" motors generating combined pressure on every panel simultaneously, joint integrity and panel rigidity are not optional. They are the structural foundation the enclosure depends on to maintain acoustic performance over time.\u003c\/p\u003e\n\u003ch3\u003eSingle Terminal Cup: Same Impedance Required\u003c\/h3\u003e\n\u003cp\u003eThe P12D-S uses a single \u003cstrong\u003eABS\/Carbon Fiber Composite recessed terminal cup\u003c\/strong\u003e built in-house at our Tennessee facility. Both drivers are wired internally to the cup with stainless steel hardware, aluminum landing plates, and copper ring terminals, pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. Both drivers must be run at the same impedance. Confirm your amplifier output and driver impedances match before wiring.\u003c\/p\u003e\n\u003cdiv class=\"px-grid\"\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eShopSabre CNC Routers\u003c\/h4\u003e\n\u003cp\u003eEvery panel is machine-cut on ShopSabre industrial CNC routers. Both driver cutouts are machined to identical diameter and position across the 28\" baffle. Consistent geometry across every unit produced.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eHand-Assembled in Tennessee\u003c\/h4\u003e\n\u003cp\u003eEvery enclosure is hand-assembled at our Tennessee facility and inspected before it ships. No overseas manufacturing. No batch assembly shortcuts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eDark Gray Trunkliner or Plush Black\u003c\/h4\u003e\n\u003cp\u003eBoth finish options are professionally applied. Dark Gray Trunkliner blends with factory trunk materials. Plush Black delivers the traditional aftermarket look. Both are durably bonded for long-term wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eShipping Included\u003c\/h4\u003e\n\u003cp\u003eNo freight charges at checkout. The price you see is the price you pay. The enclosure ships assembled and ready to install.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Fitment --\u003e\n\u003cdiv class=\"px-section\"\u003e\n\u003ch2\u003eFitment Guide\u003c\/h2\u003e\n\u003cp\u003eThe P12D-S spans \u003cstrong\u003e28\" wide\u003c\/strong\u003e and sits at only \u003cstrong\u003e12.5\" deep\u003c\/strong\u003e: a compact depth profile for a dual 12\" enclosure. It fits across most full-size trunk floors without the depth commitment of any ported 12\" build.\u003c\/p\u003e\n\u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n\u003cdiv class=\"px-highlight\"\u003e\n\u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 28\" W x 14.5\" H x 12.5\" D\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 2.0 ft³, shared air space, heavily braced\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e N\/A, Sealed\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 11.15\"\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 7\"\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFront Panel Thickness:\u003c\/strong\u003e 0.75\" Single Baffle\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe P12D-S accommodates any 12\" subwoofer with a cutout diameter at or below \u003cstrong\u003e11.15\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e7\"\u003c\/strong\u003e. Both drivers must be the same model and impedance. Verify published specifications before ordering.\u003c\/p\u003e\n\u003ch3\u003eCompatible Drivers\u003c\/h3\u003e\n\u003cp\u003eThe following drivers are available from Audio Intensity and are compatible with the P12D-S:\u003c\/p\u003e\n\u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-12-inch-subwoofer-nb2-series\"\u003eProdigy NB2-12D4 \u003c\/a\u003e \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/image-dynamics-id12-v4-12-inch-subwoofer\"\u003eImage Dynamics ID12 V4 \u003c\/a\u003e \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-12-inch-subwoofer-nb3-series\"\u003eProdigy NB3-12D4 \u003c\/a\u003e \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/arc-audio-arc-series-12-subwoofer\"\u003eArc Audio ARC12 D2 \u003c\/a\u003e\n\u003cp style=\"font-size: 0.9em; color: #64748b; margin-top: 12px;\"\u003eAlways verify cutout diameter and mounting depth against your specific driver's published specifications before ordering. Both drivers must be run at the same impedance.\u003c\/p\u003e\n\u003ch3\u003eIdeal Install Applications\u003c\/h3\u003e\n\u003cdiv class=\"px-grid\"\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eFull Trunk Floor Build\u003c\/h4\u003e\n\u003cp\u003eAt 28\" wide and 12.5\" deep, the P12D-S spans a full-size trunk floor with less depth than most single 12\" ported enclosures. A dual 12\" sealed build that fits where ported builds of any size cannot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eSQ and DSP-Controlled Systems\u003c\/h4\u003e\n\u003cp\u003eTwo sealed 12\" drivers produce the combined output and wide bass presentation that SQ competition builds demand, with the flat sealed response that DSP-controlled systems can tune precisely. The most capable sealed configuration in the Performance Series lineup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eHigh-Output Daily Systems\u003c\/h4\u003e\n\u003cp\u003eCombined cone area approaching a single 18\" in sealed alignment produces output that fills large vehicles and pressurizes the cabin at moderate power levels. A strong platform for daily high-output builds that prioritize accuracy over raw SPL.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eStep Up From Single 12\" Sealed\u003c\/h4\u003e\n\u003cp\u003eFor builds running the P12-S that need more output and wider bass presentation without switching to a ported alignment, the P12D-S is the direct step up. Same driver compatibility, significantly more output and soundstage width.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- CTA --\u003e\n\u003cdiv class=\"px-cta\"\u003e\n\u003ch2\u003eDual 12\" Accuracy. Compact Depth. Tennessee-Built.\u003c\/h2\u003e\n\u003cp\u003eThe Proline X P12D-S delivers dual 12\" sealed performance in a 12.5\" deep enclosure that fits where larger builds cannot. Langboard Elite MDF. V-groove and dado joinery. Heavy internal bracing. In-house terminal cup. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n\u003cp\u003eTwo drivers. Sealed accuracy. Combined cone area approaching a single 18\", in a compact trunk floor footprint. \u003cstrong\u003e$219.99 Dark Gray Trunkliner. $229.99 Plush Black.\u003c\/strong\u003e Shipping included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":42257195303001,"sku":"P12D-S G","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":42257195335769,"sku":"P12D-S B","price":229.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-performance-p12d-s-dual-12-inch-sealed-subwoofer-boxsubwoofer-enclosuresproline-x-736180.jpg?v=1761969147"},{"product_id":"proline-x-p12d-p-dual-12-ported-subwoofer-enclosure-v3","title":"Proline X P12D-P | Dual 12\" Ported Subwoofer Enclosure | V3","description":"\u003cstyle\u003e\n .px-desc {\n font-family: 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.8;\n color: #1e293b;\n max-width: 1200px;\n margin: 0 auto;\n background: #ffffff;\n }\n\n .px-hero {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-hero .px-title {\n font-size: 2.6em;\n font-weight: 800;\n text-transform: uppercase;\n letter-spacing: 2px;\n margin: 0 0 10px 0;\n color: white;\n }\n\n .px-hero .px-subtitle {\n font-size: 1.2em;\n font-weight: 300;\n opacity: 0.9;\n margin: 0 0 30px 0;\n }\n\n .px-badges {\n display: flex;\n justify-content: center;\n flex-wrap: wrap;\n gap: 12px;\n margin-top: 20px;\n }\n\n .px-badge {\n background: rgba(6, 182, 212, 0.2);\n border: 1px solid #06b6d4;\n color: #67e8f9;\n padding: 8px 20px;\n border-radius: 20px;\n font-size: 0.9em;\n font-weight: 600;\n letter-spacing: 0.5px;\n }\n\n .px-section {\n padding: 50px 40px;\n border-bottom: 1px solid #e2e8f0;\n background: #ffffff;\n }\n\n .px-section:nth-child(even) {\n background: #f0f9ff;\n }\n\n .px-section h2 {\n color: #0e7490;\n font-size: 2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n padding-bottom: 12px;\n border-bottom: 3px solid #06b6d4;\n }\n\n .px-section h3 {\n color: #0f172a;\n font-size: 1.4em;\n font-weight: 600;\n margin: 30px 0 15px 0;\n }\n\n .px-section p {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 18px;\n }\n\n .px-section ul {\n margin: 15px 0;\n padding-left: 25px;\n }\n\n .px-section li {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 10px;\n line-height: 1.7;\n }\n\n .px-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 24px;\n margin: 30px 0;\n }\n\n .px-card {\n background: #ffffff;\n border: 1px solid #e2e8f0;\n border-top: 4px solid #06b6d4;\n border-radius: 6px;\n padding: 24px;\n }\n\n .px-card h4 {\n color: #0e7490;\n font-size: 1.15em;\n font-weight: 700;\n margin: 0 0 12px 0;\n }\n\n .px-card p {\n font-size: 1em;\n color: #475569;\n margin: 0;\n line-height: 1.7;\n }\n\n .px-highlight {\n background: #f0f9ff;\n border-left: 5px solid #06b6d4;\n padding: 24px 28px;\n margin: 28px 0;\n border-radius: 0 6px 6px 0;\n }\n\n .px-highlight h3 {\n color: #0e7490;\n margin: 0 0 12px 0;\n font-size: 1.2em;\n }\n\n .px-highlight p {\n margin-bottom: 10px;\n color: #1e293b;\n }\n\n .px-cta {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-cta h2 {\n font-size: 2.2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n color: white;\n border: none;\n padding: 0;\n }\n\n .px-cta p {\n font-size: 1.15em;\n opacity: 0.92;\n max-width: 800px;\n margin: 0 auto 20px auto;\n color: white;\n }\n\n .px-driver-link {\n display: inline-block;\n background: #f0f9ff;\n border: 2px solid #06b6d4;\n border-radius: 6px;\n padding: 16px 24px;\n margin: 10px 10px 10px 0;\n text-decoration: none;\n color: #0e7490;\n font-weight: 700;\n font-size: 1em;\n transition: all 0.2s ease;\n }\n\n .px-driver-link:hover {\n background: #06b6d4;\n color: white;\n }\n\n @media (max-width: 768px) {\n .px-hero { padding: 40px 20px; }\n .px-hero .px-title { font-size: 1.8em; }\n .px-section { padding: 30px 20px; }\n .px-section h2 { font-size: 1.6em; }\n .px-grid { grid-template-columns: 1fr; }\n .px-cta { padding: 40px 20px; }\n .px-cta h2 { font-size: 1.6em; }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"px-desc\"\u003e\n\n \u003c!-- Hero --\u003e\n \u003cdiv class=\"px-hero\"\u003e\n \u003cp class=\"px-title\"\u003eProline X P12D-P\u003c\/p\u003e\n \u003cp class=\"px-subtitle\"\u003eDual 12\" Ported Subwoofer Enclosure | V3\u003c\/p\u003e\n \u003cdiv class=\"px-badges\"\u003e\n \u003cspan class=\"px-badge\"\u003e2.75 ft³ Net\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e36Hz Tuning\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003ePorted Bass Reflex\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e7.125\" Max Depth\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Introduction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eDual 12\" Ported Output. The Highest Output Configuration in the Performance Series.\u003c\/h2\u003e\n \u003cp\u003eThe \u003cstrong\u003eProline X P12D-P\u003c\/strong\u003e is a dual 12\" slot-ported enclosure built for installs that demand maximum output and deep low-frequency extension. At \u003cstrong\u003e2.75 ft³ net\u003c\/strong\u003e and tuned to \u003cstrong\u003e36Hz\u003c\/strong\u003e, this enclosure gives two 12\" drivers the combined air space and port geometry to produce output at the top end of what the Performance Series delivers. Two 12\" drivers in ported alignment at 36Hz produce combined output that fills large vehicles and dedicated listening spaces. Output that requires custom fabrication or a purpose-built SPL setup to exceed.\u003c\/p\u003e\n \u003cp\u003eAt \u003cstrong\u003e32\" wide, 15\" tall, and 15.3\" deep\u003c\/strong\u003e, the P12D-P is a dedicated trunk build. Both the 32\" width and 15.3\" depth are critical dimensions. Measure your available trunk space carefully before ordering. The \u003cstrong\u003e7.125\" max mounting depth\u003c\/strong\u003e covers the majority of standard 12\" drivers. A single terminal cup handles both drivers internally. Both must be run at the same impedance.\u003c\/p\u003e\n \u003cp\u003eEvery panel is CNC-cut from \u003cstrong\u003eLangboard Elite MDF\u003c\/strong\u003e to exact internal volume and assembled by hand in our Tennessee facility. Port geometry is CNC-cut to exact dimensions. Tuning is consistent unit to unit. Finish options are Dark Gray Trunkliner or Plush Black. Shipping is included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- Why Ported --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eWhy Dual 12\" Ported at 36Hz\u003c\/h2\u003e\n \u003cp\u003eThe dual 12\" ported configuration at 36Hz is the highest-output enclosure in the Performance Series lineup. Two 12\" drivers in ported alignment produce combined output that exceeds what most single large-format drivers in ported enclosures can match at equivalent amplifier power levels. The 36Hz tuning point places the port output peak in the upper sub-bass range, where impact is most audible and where the combined efficiency of two ported drivers reaches its maximum.\u003c\/p\u003e\n \u003cp\u003eAt 2.75 ft³ net, each driver has adequate air space to operate efficiently in ported alignment. Port velocity is controlled at this volume, no chuffing, no audible port noise at real-world listening levels. Both drivers operate at the same correctly-sized acoustic load at the same tuning frequency, which produces consistent output and consistent port behavior across the full output range of the enclosure.\u003c\/p\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eMaximum Performance Series Output\u003c\/h4\u003e\n \u003cp\u003eTwo 12\" drivers in ported alignment at 36Hz represent the peak output configuration in the Performance Series. Combined efficiency at the tuning point produces bass output that no other enclosure in the lineup approaches.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e36Hz: Deep and Impactful\u003c\/h4\u003e\n \u003cp\u003e36Hz places the efficiency peak at the upper sub-bass range where bass impact is most audible. Strong output from the mid-30s through the upper bass range without port velocity issues at the 2.75 ft³ volume this enclosure provides.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e2.75 ft³: Room to Breathe\u003c\/h4\u003e\n \u003cp\u003eEach driver has adequate air space in ported alignment. Port velocity stays controlled at real-world listening levels. Both drivers operate efficiently at 36Hz without the enclosure working against them or port noise becoming audible.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eWide Bass Dispersion\u003c\/h4\u003e\n \u003cp\u003eTwo drivers spaced across a 32\" baffle produce the widest bass dispersion in the Performance Series ported lineup. Low-frequency output is distributed evenly across the full cabin width at output levels that demand it.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Construction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eConstruction: Maximum Volume, CNC-Cut Port Geometry, Single Terminal Cup\u003c\/h2\u003e\n \u003cp\u003eThe P12D-P uses the same Langboard Elite MDF and V-groove and dado joinery construction as every enclosure in the Proline X Performance Series. At 32\" wide and 15.3\" deep, this is the largest enclosure in the Performance Series lineup. Joint integrity and panel rigidity across every panel are critical at this scale. Port geometry is CNC-cut to exact dimensions. A single terminal cup handles both drivers internally.\u003c\/p\u003e\n\n \u003ch3\u003eLangboard Elite MDF, Named, Verified, Documented\u003c\/h3\u003e\n \u003cp\u003eEvery panel is cut from \u003cstrong\u003eLangboard Elite MDF: 3\/4\" (18mm)\u003c\/strong\u003e, a named, mill-documented panel stock produced in the United States. The specifications below are pulled directly from Langboard's published mill data.\u003c\/p\u003e\n\n \u003cdiv class=\"px-highlight\"\u003e\n \u003ch3\u003eLangboard Elite: Published Mill Data\u003c\/h3\u003e\n \u003cp\u003e\u003cstrong\u003eDensity:\u003c\/strong\u003e 48.5 lbs\/ft³, higher density means less porosity, better screw retention, and reduced resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eInternal Bond:\u003c\/strong\u003e 200 psi, resistance to delamination under sustained bass pressure cycling\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eModulus of Elasticity:\u003c\/strong\u003e 410,000 psi, panel stiffness under load; less flex means less resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFace Screw Holding:\u003c\/strong\u003e 325 lbs, baffle hardware stays locked under vibration\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eEdge Screw Holding:\u003c\/strong\u003e 250 lbs, joint integrity at every panel edge connection\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eV-Groove and Dado Joinery\u003c\/h3\u003e\n \u003cp\u003eEvery panel joint uses \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, CNC-cut interlocking grooves that mechanically lock panels before adhesive is applied. On the largest enclosure in the Performance Series lineup, joint integrity across 32\" wide panels and 15.3\" deep side walls is the difference between an enclosure that holds its acoustic performance over years of sustained high-output use and one that does not. Every joint on the P12D-P is mechanically locked before adhesive is applied.\u003c\/p\u003e\n\n \u003ch3\u003eSingle Terminal Cup: Same Impedance Required\u003c\/h3\u003e\n \u003cp\u003eThe P12D-P uses a single \u003cstrong\u003eABS\/Carbon Fiber Composite recessed terminal cup\u003c\/strong\u003e built in-house at our Tennessee facility. Both drivers are wired internally to the cup with stainless steel hardware, aluminum landing plates, and copper ring terminals, pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. Both drivers must be run at the same impedance. Confirm your amplifier output and driver impedances before wiring.\u003c\/p\u003e\n\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eCNC-Cut Port Geometry\u003c\/h4\u003e\n \u003cp\u003ePort length, cross-section, and position are machine-cut to exact dimensions on ShopSabre CNC routers. Tuning frequency is consistent unit to unit. No hand-cut variance in port dimensions across the largest enclosure in the lineup.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHand-Assembled in Tennessee\u003c\/h4\u003e\n \u003cp\u003eEvery enclosure is hand-assembled at our Tennessee facility and inspected before it ships. No overseas manufacturing. No batch assembly shortcuts. Regardless of enclosure size.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDark Gray Trunkliner or Plush Black\u003c\/h4\u003e\n \u003cp\u003eBoth finish options are professionally applied. Dark Gray Trunkliner blends with factory trunk materials. Plush Black delivers the traditional aftermarket look. Both are durably bonded for long-term wear.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShipping Included\u003c\/h4\u003e\n \u003cp\u003eNo freight charges at checkout. The price you see is the price you pay. The enclosure ships assembled and ready to install.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Fitment --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eFitment Guide\u003c\/h2\u003e\n \u003cp\u003eThe P12D-P is the largest enclosure in the Performance Series. At \u003cstrong\u003e32\"W x 15\"H x 15.3\"D\u003c\/strong\u003e, both the width and depth are critical dimensions. This is a dedicated trunk build. Measure both dimensions carefully before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n \u003cdiv class=\"px-highlight\"\u003e\n \u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 32\" W x 15\" H x 15.3\" D\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 2.75 ft³\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e 36Hz\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 11.15\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 7.125\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFront Panel Thickness:\u003c\/strong\u003e 0.75\" Single Baffle\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n \u003cp\u003eThe P12D-P accommodates any 12\" subwoofer with a cutout diameter at or below \u003cstrong\u003e11.15\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e7.125\"\u003c\/strong\u003e. Both drivers must be the same model and impedance. Verify published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eCompatible Drivers\u003c\/h3\u003e\n \u003cp\u003eThe following drivers are available from Audio Intensity and are compatible with the P12D-P:\u003c\/p\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-12-inch-subwoofer-nb2-series\"\u003eProdigy NB2-12D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/image-dynamics-id12-v4-12-inch-subwoofer\"\u003eImage Dynamics ID12 V4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-12-inch-subwoofer-nb3-series\"\u003eProdigy NB3-12D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/arc-audio-arc-series-12-subwoofer\"\u003eArc Audio ARC12 D2 \u003c\/a\u003e\n \u003cp style=\"font-size:0.9em; color:#64748b; margin-top:12px;\"\u003eAlways verify cutout diameter and mounting depth against your specific driver's published specifications before ordering. Both drivers must be run at the same impedance.\u003c\/p\u003e\n\n \u003ch3\u003eIdeal Install Applications\u003c\/h3\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDedicated Trunk Build\u003c\/h4\u003e\n \u003cp\u003eAt 32\" wide and 15.3\" deep, the P12D-P requires a dedicated trunk installation with adequate space for both dimensions. Measure your available trunk width and depth before ordering. Both are critical.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eMaximum Performance Series Output\u003c\/h4\u003e\n \u003cp\u003eThe P12D-P is the highest-output enclosure in the Performance Series lineup. For builds where maximum output from a production enclosure is the goal: this is the correct choice.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eLarge Vehicle High-Output Systems\u003c\/h4\u003e\n \u003cp\u003eFull-size sedans, trucks, and SUVs with adequate trunk dimensions are the natural home for the P12D-P. The combined output of two 12\" drivers in ported alignment fills large acoustic spaces that smaller configurations cannot pressurize effectively.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eStep Up From Sealed\u003c\/h4\u003e\n \u003cp\u003eFor builds running the P12D-S that need significantly more output and lower frequency extension, the P12D-P is the direct step up. Same driver compatibility, the full output advantage of ported alignment at 36Hz.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- CTA --\u003e\n \u003cdiv class=\"px-cta\"\u003e\n \u003ch2\u003eMaximum Dual 12\" Output. Tennessee-Built. Shipping Included.\u003c\/h2\u003e\n \u003cp\u003eThe Proline X P12D-P is the highest-output enclosure in the Performance Series. Langboard Elite MDF. V-groove and dado joinery. CNC-cut port geometry. In-house terminal cup. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n \u003cp\u003eTwo drivers. Ported efficiency. The peak output configuration in the Proline X Performance Series lineup. \u003cstrong\u003e$269.99 Dark Gray Trunkliner. $279.99 Plush Black.\u003c\/strong\u003e Shipping included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":43157680455769,"sku":"P12D-P G","price":269.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":43157680488537,"sku":"P12D-P B","price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/products\/proline-x-performance-p12d-p-ported-enclosure-for-dual-12-subwooferssubwoofer-enclosuresproline-x-723960.jpg?v=1761969165"},{"product_id":"jeep-jk-subwoofer-box","title":"Jeep JK Subwoofer Box 2007-2017 4 Door","description":"\u003ch2 data-mce-fragment=\"1\"\u003eUpgrade Your Jeep Wrangler Audio\u003c\/h2\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\n\u003cspan\u003eThe Proline X VS \u003c\/span\u003e\u003cem\u003eCustom Subwoofer Enclosure\u003c\/em\u003e\u003cspan\u003e for \u003c\/span\u003e\u003cem\u003eJeep JK Tailored\u003c\/em\u003e\u003cspan\u003e Bass Solutions for Jeep Enthusiasts\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp\u003eElevate your Jeep Wrangler's sound system with the Proline X VS Jeep 12-S, meticulously crafted for the 2007-2017 JK series 4-door Jeep Wrangler and also fitting the Jeep Wrangler JK 4-door. This custom subwoofer enclosure is not merely an addition but a transformative element for your off-road escapades and city drives, striking the perfect balance between immersive sound and efficient use of space.\u003c\/p\u003e\n\u003cp\u003eDesigned to provide deep, resonant bass without sacrificing your Wrangler's cargo area functionality or design, the Proline X VS Jeep 12-S features:\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpace-Efficient Design:\u003c\/strong\u003e It integrates flawlessly within the cargo space, preserving your Jeep's practicality and sleek appearance, making it an ideal Jeep JK 2-Door\u003cem data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/audiointensity.com\/collections\/subwoofer-box\" target=\"_blank\" rel=\"noopener\"\u003e Subwoofer Box\u003c\/a\u003e\u003c\/em\u003e\u003cspan\u003e data-mce-fragment=\"1\"\u0026gt;.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eOptimized for Rich Bass:\u003c\/strong\u003e  \u003cspan data-mce-fragment=\"1\"\u003eAccommodates any standard 10\" or 12\" subwoofer, with a sealed air space of 1.1ft³ and up to 9\" mounting depth, ensuring premium bass performance for the \u003c\/span\u003e\u003cem data-mce-fragment=\"1\"\u003eJeep JK Subwoofer Enclosure\u003c\/em\u003e\u003cspan data-mce-fragment=\"1\"\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eDurable Construction: \u003c\/strong\u003eConstructed from robust 100% MDF, this enclosure is as rugged as your Jeep, with a bed liner interior coating for superior sound quality and longevity, perfect for a \u003cem data-mce-fragment=\"1\"\u003eJKU Subwoofer Box\u003c\/em\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eExceptional Sound for Every Journey | Proudly Made in the USA\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eThe Proline X VS Jeep 12-S is a custom-built subwoofer enclosure designed to enhance your driving experience, whether navigating urban streets or tackling the great outdoors. Its features include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan\u003e\u003cstrong\u003eCustom Fit for Your Jeep\u003c\/strong\u003e: Engineered for both driver and passenger-side installations, these durable, Jeep-specific sub-boxes are customizable to your sound preferences, making them suitable as a \u003c\/span\u003e\u003cem\u003eJeep Wrangler JK 4 Door Subwoofer Box\u003c\/em\u003e\u003cspan\u003e. \u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cstrong\u003eBroad Compatibility\u003c\/strong\u003e: It is ideal for the 4-door Jeep Wrangler JK and Unlimited models, with upcoming versions for the Jeep Wrangler JL.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFAQs\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWill this subwoofer box fit my Jeep?\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eWe specifically tailored for 2007-2017 JK series 4-door Jeep Wrangler and Wrangler Unlimited models, with a Jeep Wrangler JL variant on the way. This makes it a perfect fit for those searching for a \u003c\/span\u003e\u003cem data-mce-fragment=\"1\"\u003eJeep JK 2 Door Subwoofer Box\u003c\/em\u003e\u003cspan data-mce-fragment=\"1\"\u003e or a \u003c\/span\u003e\u003cem data-mce-fragment=\"1\"\u003eJeep JK 4 Door Subwoofer Box\u003c\/em\u003e\u003cspan data-mce-fragment=\"1\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eCan this be used with a soft-top Jeep Wrangler?\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes, its design ensures seamless integration without interfering with soft-top functionality, ideal for those with a \u003c\/span\u003e\u003cem\u003eJeep JK Subwoofer Enclosure\u003c\/em\u003e\u003cspan\u003e in mind.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat about installing dual sub-boxes for enhanced sound?\u003c\/h3\u003e\n\u003cp\u003eAbsolutely, installing a subwoofer enclosure on each side is possible for those seeking superior bass depth, especially for a \u003cem\u003eJKU Subwoofer Box\u003c\/em\u003e setup.\u003cbr\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eKey Features at a Glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan\u003e\u003cstrong\u003eJeep JK and Unlimited Specific:\u003c\/strong\u003e Custom-designed for the 2007-2017 JK series 4-door Jeep Wrangler, also suitable as a \u003c\/span\u003e\u003cem\u003eJeep Wrangler JK 4 Door Subwoofer Box\u003c\/em\u003e\u003cspan\u003e. \u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan\u003e\u003cstrong\u003eOptimal Space and Sound Balance:\u003c\/strong\u003e It delivers powerful bass without compromising cargo space, making it an ideal choice for a Jeep JK 2-Door Subwoofer\u003c\/span\u003e\u003cem\u003e Box\u003c\/em\u003e\u003cspan\u003e. \u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan\u003e\u003cstrong\u003eSuperior Bass Performance:\u003c\/strong\u003e This enclosure supports 10\" or 12\" subwoofers for exceptional sound, making it a must-have for any \u003c\/span\u003e\u003cem\u003eJeep JK Subwoofer Enclosure\u003c\/em\u003e\u003cspan\u003e. \u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan\u003e\u003cstrong\u003eSturdy and Durable:\u003c\/strong\u003e It has a 100% MDF construction and an interior bed liner for enhanced sound, perfect for \u003c\/span\u003e\u003cem\u003eJKU Subwoofer Box\u003c\/em\u003e\u003cspan\u003e enthusiasts. \u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan\u003e\u003cstrong\u003eFlexible Installation:\u003c\/strong\u003e Fits both sides of the Jeep and is compatible with soft-top models, offering versatility for \u003c\/span\u003e\u003cem\u003eJeep Wrangler JK 4 Door Subwoofer Box\u003c\/em\u003e\u003cspan\u003e installations. \u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cstrong\u003eElegant Plush Black Carpet:\u003c\/strong\u003e This carpet comes standard for a sophisticated look and added protection, enhancing the aesthetic of your Jeep JK Subwoofer Box.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan\u003e\u003cstrong\u003e Option for Extra Durability\u003c\/strong\u003e: An exterior\u003c\/span\u003e\u003cspan\u003e bed liner coating is available for increased toughness, ideal for rugged \u003c\/span\u003e\u003cem\u003eJeep JK Subwoofer Enclosures\u003c\/em\u003e\u003cspan\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan\u003e\u003cstrong\u003e Customization Options:\u003c\/strong\u003e Acrylic inserts are available for a personalized aesthetic, adding a unique touch to your \u003c\/span\u003e\u003cem\u003eJKU Subwoofer Box\u003c\/em\u003e\u003cspan\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eTransform the sound experience in your Jeep Wrangler with the Proline X Custom Subwoofer Enclosure for Jeep JK, offering rugged durability, exceptional audio performance, and the perfect fit for your lifestyle. Enjoy the added perk of free shipping in the lower 48 US states and the convenience of included mounting hardware for straightforward installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e***Does Not include a subwoofer. \u003c\/p\u003e","brand":"Proline X","offers":[{"title":"12\" \/ Driver Side \/ No","offer_id":40911379333209,"sku":"VS JK 12-S D","price":599.99,"currency_code":"USD","in_stock":false},{"title":"12\" \/ Driver Side \/ Yes","offer_id":40911379267673,"sku":"VS JK 12-S D Acr","price":679.99,"currency_code":"USD","in_stock":false},{"title":"12\" \/ Passenger Side \/ No","offer_id":40911379365977,"sku":"VS JK 12-S P","price":599.99,"currency_code":"USD","in_stock":false},{"title":"12\" \/ Passenger Side \/ Yes","offer_id":40911379300441,"sku":"VS JK 12-S P Acr","price":679.99,"currency_code":"USD","in_stock":false},{"title":"10\" \/ Driver Side \/ No","offer_id":40911379202137,"sku":"VS JK 10-S D","price":599.99,"currency_code":"USD","in_stock":false},{"title":"10\" \/ Driver Side \/ Yes","offer_id":40911379136601,"sku":"VS JK 10-S D Acr","price":679.99,"currency_code":"USD","in_stock":false},{"title":"10\" \/ Passenger Side \/ No","offer_id":40911379234905,"sku":"VS JK 10-S P","price":599.99,"currency_code":"USD","in_stock":false},{"title":"10\" \/ Passenger Side \/ Yes","offer_id":40911379169369,"sku":"VS JK 10-S P Acr","price":679.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/products\/jeep-jk-subwoofer-box-2007-2017-4-doorproline-x-295493.jpg?v=1761970108"},{"product_id":"proline-x-micro-series-sealed-dual-12-enclosure-loaded-wavtech-thinpro-12","title":"Proline X Dual Shallow 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 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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 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 0 680 300\" 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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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":1899.99,"currency_code":"USD","in_stock":true},{"title":"4 ohm \/ Yes- Contact me for details","offer_id":42347680104537,"sku":"Micro 12D-S thinPRO12 4ohm","price":1999.99,"currency_code":"USD","in_stock":true},{"title":"1 ohm \/ No Thanks","offer_id":42347678302297,"sku":"M12D-S Wav Loaded 1 ohm final","price":1899.99,"currency_code":"USD","in_stock":true},{"title":"1 ohm \/ Yes- Contact me for details","offer_id":42347680170073,"sku":"Micro 12D-S thinPRO12 1ohm","price":1999.99,"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-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; 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}\n  .vs-hero p {\n    color: #cbd5e1;\n    font-size: 0.97em;\n    margin: 0;\n    max-width: 620px;\n    line-height: 1.7;\n  }\n  .vs-hero p strong { color: #ffffff; }\n\n  \/* ── Fitment Alert ── *\/\n  .vs-fitment-alert {\n    background: #eff6ff;\n    border: 1px solid #bfdbfe;\n    border-left: 5px solid #2563eb;\n    border-radius: 0 6px 6px 0;\n    padding: 18px 24px;\n    margin-bottom: 28px;\n    display: flex;\n    align-items: flex-start;\n    gap: 16px;\n  }\n  .vs-fitment-alert-icon {\n    background: #2563eb;\n    color: #ffffff;\n    font-size: 0.75em;\n    font-weight: 800;\n    letter-spacing: 0.08em;\n    text-transform: uppercase;\n    padding: 5px 10px;\n    border-radius: 3px;\n    white-space: nowrap;\n    margin-top: 2px;\n  }\n  .vs-fitment-alert p { color: #1e3a8a; font-size: 0.93em; margin: 0; line-height: 1.6; }\n  .vs-fitment-alert strong { color: #1e40af; }\n\n  \/* ── Section ── *\/\n  .vs-section {\n    background: #ffffff;\n    border-radius: 6px;\n    padding: 24px 28px;\n    margin-bottom: 32px;\n  }\n  .vs-section h3 {\n    color: #1e40af;\n    font-size: 1.1em;\n    font-weight: 800;\n    margin: 0 0 14px 0;\n    padding-bottom: 10px;\n    border-bottom: 2px solid #bfdbfe;\n  }\n  .vs-section p {\n    color: #334155;\n    font-size: 0.97em;\n    margin: 0 0 12px 0;\n  }\n  .vs-section p:last-child { margin-bottom: 0; }\n\n  \/* ── Why Cards ── *\/\n  .vs-card-grid {\n    display: grid;\n    grid-template-columns: repeat(2, 1fr);\n    gap: 16px;\n    margin-bottom: 32px;\n  }\n  @media (max-width: 600px) { .vs-card-grid { grid-template-columns: 1fr; } }\n  .vs-card {\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-top: 3px solid #2563eb;\n    border-radius: 6px;\n    padding: 22px;\n  }\n  .vs-card-label {\n    display: inline-block;\n    background: #2563eb;\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  .vs-card h4 { color: #1e40af; font-size: 1em; font-weight: 700; margin: 0 0 10px 0; }\n  .vs-card-divider { height: 2px; background: #2563eb; width: 32px; margin-bottom: 12px; border-radius: 2px; }\n  .vs-card p { font-size: 0.93em; color: #475569; margin: 0; line-height: 1.65; }\n  .vs-card p strong { color: #1e40af; }\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-dual-12-enclosure-wavtech-thinpro-12-enclosure-only","title":"Proline-X Micro Series Shallow 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-dual-12-sealed-enclosure-fits-resonix-gus-12","title":"Proline X Micro Series Dual Shallow 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 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.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-enclosure-x-series-fits-dual-kicker-solo-x-12-subwoofer","title":"Proline X Enclosure | X Series | Fits Dual Kicker Solo X 12\" Subwoofer","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica 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class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Enclosure | X Series | Fits Dual Kicker Solo X 12\" Subwoofer\u003c\/h2\u003e\n  \u003cp\u003eAudio Intensity and Proline X are not affiliated with Kicker. This enclosure is built to the published parameters of the Kicker Solo-Baric L7X.\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e6.00 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 31.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTriple 2.25\" baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker Solo-Baric L7X 12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 31.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eTwo Solo-Baric L7X 12 drivers share this cabinet's airspace: 6.00 cubic feet net total, vented at 31.0 Hz through a 91.0 square inch slot. The per-driver conditions match the single-twelve box; only the total airspace and port area double.\u003c\/p\u003e\n  \u003cp\u003eF3 lands at 26.5 Hz on this pair, and passband ripple holds at 2.61 dB, comfortably inside the ceiling we hold new designs to. The port stays under the chuff threshold up to 707 W combined, above which the mouth velocity crosses Kicker's own reference. Set the subsonic filter at 24 Hz and leave it there below tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e44.00\" W x 16.00\" H x 27.50\" D external, internally braced. It ships as a UPS parcel; the price includes shipping in the 48 states.\u003c\/p\u003e\n  \u003cp\u003eThis is our dual-twelve envelope, sized for two L7X 12 drivers on one shared chamber. The baffle cutouts are machined to the L7X's square frame, which is not cross-compatible with round-frame drivers of the same nominal size. You source the driver. We handle the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \u003cp\u003eKicker's own Klippel rig measured the L7X 12 under SKU 49L7X122, the same parameters carried into both drivers in this dual cabinet; the Dual 2 Ohm coil is the one they publish, and the cabinet fits either the D1 or D2 version of the driver. Kicker publishes no outer frame dimension for the L7X, so the frame OD used here, 12.5625 inches, is estimated from the published cutout. This cabinet's shipping weight is estimated from its shell rather than measured on the dock. Scott's Q2 catalog sheet lists two different dual-twelve forms; the wider, shallower form actually on the store is the one this alignment is built to. Audio Intensity and Proline X are not affiliated with Kicker.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is 6.00 cubic feet net, with a slot port of 91.0 square inches tuned to 31.0 Hz; the port stays under the chuff threshold up to 707 W; above that the air at the mouth moves faster than the 17 metres per second where a slot starts to chuff.\u003c\/p\u003e\n  \u003cp\u003eSet a 24 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 16.3 mm of its 31.2 mm at 3000 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Standard - Hex and Flag","offer_id":43278391378009,"sku":"Pro12D-P KIK HEX","price":1249.99,"currency_code":"USD","in_stock":true},{"title":"None - Carpet Only","offer_id":43278391345241,"sku":"Pro12D-P KIK NA","price":1229.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-enclosure-x-series-fits-dual-kicker-solo-x-12-subwoofersubwoofer-enclosuresproline-x-9144715.webp?v=1779355146"},{"product_id":"performance-optimized-dual-sealed-12-enclosure-image-dynamics-idq-12","title":"Performance Optimized Dual Sealed 12\" Enclosure | Image Dynamics IDQ 12","description":"\u003cdiv class=\"po-desc\"\u003e\n\u003cstyle\u003e\n  .po-desc {\n    --po-dark: #0f172a;\n    --po-deep: #0e7490;\n    --po-accent: #06b6d4;\n    --po-tint: #f0f9ff;\n    --po-line: #cfe8f3;\n    --po-text: #1a2233;\n    --po-muted: #4a5568;\n    max-width: 1200px;\n    margin: 0 auto;\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: var(--po-text) !important;\n    line-height: 1.6;\n  }\n  .po-desc * { box-sizing: border-box; }\n  .po-hero {\n    background: linear-gradient(135deg, var(--po-dark) 0%, #134e63 55%, var(--po-deep) 100%);\n    color: #fff !important;\n    padding: 56px 44px;\n    border-radius: 14px;\n    text-align: center;\n  }\n  .po-hero .po-eyebrow {\n    display: inline-block;\n    font-size: 13px;\n    letter-spacing: 2.5px;\n    text-transform: uppercase;\n    color: #7dd3fc !important;\n    font-weight: 700;\n    margin-bottom: 16px;\n  }\n  .po-hero h2 {\n    font-size: 34px;\n    line-height: 1.2;\n    margin: 0 0 14px;\n    color: #fff !important;\n    font-weight: 800;\n  }\n  .po-hero p {\n    font-size: 18px;\n    color: #d6f0fa !important;\n    max-width: 760px;\n    margin: 0 auto;\n  }\n  .po-badges {\n    display: flex;\n    flex-wrap: wrap;\n    justify-content: center;\n    gap: 10px;\n    margin-top: 22px;\n  }\n  .po-badge {\n    background: rgba(255,255,255,0.12);\n    border: 1px solid rgba(125,211,252,0.5);\n    color: #d6f0fa !important;\n    font-size: 12.5px;\n    font-weight: 700;\n    letter-spacing: 1px;\n    text-transform: uppercase;\n    padding: 7px 14px;\n    border-radius: 999px;\n  }\n  .po-section {\n    background: #ffffff;\n    padding: 40px 44px;\n    margin-top: 26px;\n    border-radius: 14px;\n    border: 1px solid var(--po-line);\n  }\n  .po-section.tint { background: var(--po-tint); }\n  .po-section h3 {\n    font-size: 25px;\n    margin: 0 0 18px;\n    color: var(--po-deep) !important;\n    font-weight: 800;\n  }\n  .po-section p {\n    font-size: 16.5px;\n    color: var(--po-text) !important;\n    margin: 0 0 16px;\n  }\n  .po-section p:last-child { margin-bottom: 0; }\n  .po-highlight {\n    border-left: 4px solid var(--po-accent);\n    background: #ecfbff;\n    padding: 20px 24px;\n    border-radius: 0 10px 10px 0;\n    margin: 22px 0 0;\n  }\n  .po-highlight p { margin: 0; font-size: 16px; }\n  .po-grid {\n    display: grid;\n    grid-template-columns: 1fr 1fr;\n    gap: 20px;\n    margin-top: 24px;\n  }\n  @media (max-width: 720px) { .po-grid { grid-template-columns: 1fr; } }\n  .po-card {\n    background: #ffffff;\n    border: 1px solid var(--po-line);\n    border-radius: 12px;\n    padding: 26px;\n  }\n  .po-card-label {\n    display: inline-block;\n    font-size: 11.5px;\n    letter-spacing: 1.5px;\n    text-transform: uppercase;\n    color: var(--po-accent) !important;\n    font-weight: 700;\n    margin-bottom: 10px;\n  }\n  .po-card h4 {\n    font-size: 18.5px;\n    margin: 0 0 12px;\n    color: var(--po-deep) !important;\n    font-weight: 700;\n  }\n  .po-card-divider {\n    width: 42px;\n    height: 3px;\n    background: var(--po-accent);\n    border-radius: 2px;\n    margin: 0 0 14px;\n  }\n  .po-card p { font-size: 15.5px; color: var(--po-muted) !important; margin: 0; }\n  .po-stats {\n    display: grid;\n    grid-template-columns: repeat(3, 1fr);\n    gap: 16px;\n    margin-top: 22px;\n  }\n  @media (max-width: 720px) { .po-stats { grid-template-columns: 1fr; } }\n  .po-stat-cell {\n    background: linear-gradient(160deg, #134e63, var(--po-deep));\n    color: #fff !important;\n    border-radius: 12px;\n    padding: 24px 20px;\n    text-align: center;\n  }\n  .po-stat-cell .num {\n    display: block;\n    font-size: 30px;\n    font-weight: 800;\n    line-height: 1.1;\n    color: #fff !important;\n  }\n  .po-stat-cell .unit {\n    display: block;\n    font-size: 13px;\n    letter-spacing: 1px;\n    text-transform: uppercase;\n    color: #a5e3f7 !important;\n    margin-top: 8px;\n  }\n  .po-cta {\n    background: linear-gradient(135deg, var(--po-deep) 0%, #134e63 50%, var(--po-dark) 100%);\n    color: #fff !important;\n    padding: 44px;\n    border-radius: 14px;\n    text-align: center;\n    margin-top: 26px;\n  }\n  .po-cta h3 { color: #fff !important; font-size: 24px; margin: 0 0 12px; font-weight: 800; }\n  .po-cta p { color: #d6f0fa !important; font-size: 16.5px; margin: 0 auto; max-width: 680px; }\n\u003c\/style\u003e\n\n  \u003cdiv class=\"po-hero\"\u003e\n    \u003cspan class=\"po-eyebrow\"\u003eProline X Performance Optimized Series\u003c\/span\u003e\n    \u003ch2\u003eDual Sealed 12\" Enclosure | Image Dynamics IDQ12 V4\u003c\/h2\u003e\n    \u003cp\u003eTwo IDQ12 V4 subwoofers. One precision airspace. This driver-specific sealed enclosure is CNC-cut around the IDQ12's published parameters, so a pair of the most musical 12s in car audio gets exactly the box they were engineered for.\u003c\/p\u003e\n    \u003cdiv class=\"po-badges\"\u003e\n      \u003cspan class=\"po-badge\"\u003eDriver-Specific\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eCNC-Cut in Tennessee\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003ePre-Wired\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003e1-Year Warranty\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch3\u003eEngineered Around the IDQ12 V4\u003c\/h3\u003e\n    \u003cp\u003eThe Image Dynamics IDQ12 V4 is a sealed-box subwoofer by design, with an EBP of 40 that tells you exactly where it belongs. This enclosure gives a pair of them the airspace Image Dynamics' parameters call for: approximately 2.8 cubic feet of net internal volume in a shared common chamber, roughly 1.4 cubic feet per driver after displacement. That sits in the extended range of the IDQ12's sealed window, trading a touch of box punch for deeper extension while preserving the transient accuracy that wins sound quality lanes.\u003c\/p\u003e\n    \u003cp\u003eThe baffle is cut for the IDQ12 V4's 10.87 inch cutout on both positions, and the 15 inch depth swallows the driver's 5.91 inch mounting depth with room to breathe. Polyfill comes pre-installed, so the enclosure performs as modeled the day it arrives.\u003c\/p\u003e\n    \u003cdiv class=\"po-stats\"\u003e\n      \u003cdiv class=\"po-stat-cell\"\u003e\n\u003cspan class=\"num\"\u003e2.8 ft³\u003c\/span\u003e\u003cspan class=\"unit\"\u003eNet Volume, Common Chamber\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"po-stat-cell\"\u003e\n\u003cspan class=\"num\"\u003e30x15x15\u003c\/span\u003e\u003cspan class=\"unit\"\u003eExternal Inches (WxHxD)\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"po-stat-cell\"\u003e\n\u003cspan class=\"num\"\u003e1000W\u003c\/span\u003e\u003cspan class=\"unit\"\u003eSystem RMS (2 x 500W)\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section tint\"\u003e\n    \u003ch3\u003ePerformance Optimized Construction\u003c\/h3\u003e\n    \u003cp\u003eEvery Performance Optimized enclosure is CNC-cut from Langboard Elite MDF on our ShopSabre routers in Tullahoma, Tennessee, with precision V-groove and dado joinery for panel alignment and long-term sealed integrity. The baffle carries 8\/32 threaded inserts matched to the IDQ12 V4's published mounting pattern, with stainless steel machine screws included, so the drivers bolt down with real hardware instead of wood screws.\u003c\/p\u003e\n    \u003cp\u003eConnections run through the Proline X ABS and carbon fiber composite terminal cup with stainless hardware and copper ring terminals, pre-wired with 12-gauge OFC to both driver positions. Drop the subs in, land two wires at the cup, and the install is done.\u003c\/p\u003e\n    \u003cdiv class=\"po-highlight\"\u003e\n      \u003cp\u003eThis is the same driver-specific approach as our Professional Series: airspace, cutouts, and hardware locked to one driver, the Image Dynamics IDQ12 V4, rather than averaged across a class of 12s.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch3\u003eFinish It Your Way\u003c\/h3\u003e\n    \u003cp\u003eThe enclosure comes wrapped in Dark Gray Trunkliner as standard, with Plush Black carpet available as an upgrade. The front baffle accepts a colored acrylic insert in Black, Blue, Red, or White to match the build, or can be ordered without the insert for a clean, blacked-out face at a reduced price.\u003c\/p\u003e\n    \u003cp\u003eOrder the box on its own if you already have your drivers, or bundle it with a matched pair of IDQ12 V4 subwoofers in Dual 2-ohm or Dual 4-ohm, and we ship everything together. A pair of Dual 2-ohm drivers wires to a 2-ohm final load; a pair of Dual 4-ohm drivers wires to 1 ohm or 4 ohms.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-grid\"\u003e\n    \u003cdiv class=\"po-card\"\u003e\n      \u003cspan class=\"po-card-label\"\u003eAirspace\u003c\/span\u003e\n      \u003ch4\u003eDriver-Matched Volume\u003c\/h4\u003e\n      \u003cdiv class=\"po-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eApproximately 1.4 cubic feet per driver in a common chamber, set against the IDQ12 V4's published sealed parameters.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"po-card\"\u003e\n      \u003cspan class=\"po-card-label\"\u003eJoinery\u003c\/span\u003e\n      \u003ch4\u003eV-Groove + Dado Construction\u003c\/h4\u003e\n      \u003cdiv class=\"po-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eCNC-cut Langboard Elite MDF with precision joinery for rigid panels and an airtight sealed cabinet that stays that way.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"po-card\"\u003e\n      \u003cspan class=\"po-card-label\"\u003eHardware\u003c\/span\u003e\n      \u003ch4\u003e8\/32 Threaded Inserts\u003c\/h4\u003e\n      \u003cdiv class=\"po-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eMatched to the IDQ12 V4 mounting pattern with stainless machine screws included. Real fasteners, repeatable torque.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"po-card\"\u003e\n      \u003cspan class=\"po-card-label\"\u003eWiring\u003c\/span\u003e\n      \u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n      \u003cdiv class=\"po-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in 12-gauge OFC to both positions.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"po-card\"\u003e\n      \u003cspan class=\"po-card-label\"\u003eStyle\u003c\/span\u003e\n      \u003ch4\u003eAcrylic Insert Options\u003c\/h4\u003e\n      \u003cdiv class=\"po-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eBlack, Blue, Red, or White front acrylic to match the build, or skip the insert for a blacked-out baffle.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"po-card\"\u003e\n      \u003cspan class=\"po-card-label\"\u003eBundles\u003c\/span\u003e\n      \u003ch4\u003eBox Only or Loaded\u003c\/h4\u003e\n      \u003cdiv class=\"po-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eOrder the enclosure alone or bundled with a matched pair of IDQ12 V4 drivers in Dual 2-ohm or Dual 4-ohm.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-cta\"\u003e\n    \u003ch3\u003eThe Box Two IDQ12s Deserve\u003c\/h3\u003e\n    \u003cp\u003ePrecision airspace, real hardware, and pre-wired connections, built around one driver and cut on CNC in Tennessee. Pair it with 1000 clean watts and let a dual IDQ12 V4 sealed stage do what it was engineered to do.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Plush Black \/ Black \/ Box Only","offer_id":43382076997721,"sku":"PO ID 12D-S IDQ BB none","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Black \/ Add 2 Dual 2ohm IDQ 12\"","offer_id":43382077030489,"sku":"PO ID 12D-S IDQ BB 2ohm","price":949.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Black \/ Add 2 Dual 4ohm IDQ 12\"","offer_id":43382077063257,"sku":"PO ID 12D-S IDQ BB 4ohm","price":949.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Blue \/ Box Only","offer_id":43382077096025,"sku":"PO ID 12D-S IDQ BBL none","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Blue \/ Add 2 Dual 2ohm IDQ 12\"","offer_id":43382077128793,"sku":"PO ID 12D-S IDQ BBL 2ohm","price":949.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Blue \/ Add 2 Dual 4ohm IDQ 12\"","offer_id":43382077161561,"sku":"PO ID 12D-S IDQ BBL 4ohm","price":949.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Red \/ Box Only","offer_id":43382077194329,"sku":"PO ID 12D-S IDQ BR none","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Red \/ Add 2 Dual 2ohm IDQ 12\"","offer_id":43382077227097,"sku":"PO ID 12D-S IDQ BR 2ohm","price":949.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Red \/ Add 2 Dual 4ohm IDQ 12\"","offer_id":43382077259865,"sku":"PO ID 12D-S IDQ BR 4ohm","price":949.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ White \/ Box Only","offer_id":43382077292633,"sku":"PO ID 12D-S IDQ  BW none","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ White \/ Add 2 Dual 2ohm IDQ 12\"","offer_id":43382077325401,"sku":"PO ID 12D-S IDQ BW 2ohm","price":949.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ White \/ Add 2 Dual 4ohm IDQ 12\"","offer_id":43382077358169,"sku":"PO ID 12D-S IDQ BW 4ohm","price":949.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ None \/ Box Only","offer_id":43382077390937,"sku":"PO ID 12D-S IDQ B none","price":369.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ None \/ Add 2 Dual 2ohm IDQ 12\"","offer_id":43382077423705,"sku":"PO ID 12D-S IDQ B 2ohm","price":929.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ None \/ Add 2 Dual 4ohm IDQ 12\"","offer_id":43382077456473,"sku":"PO ID 12D-S IDQ B 4ohm","price":929.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Black \/ Box Only","offer_id":43382077489241,"sku":"PO ID 12D-S IDQ GB None","price":379.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Black \/ Add 2 Dual 2ohm IDQ 12\"","offer_id":43382077522009,"sku":"PO ID 12D-S IDQ GB 2ohm","price":939.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Black \/ Add 2 Dual 4ohm IDQ 12\"","offer_id":43382077554777,"sku":"PO ID 12D-S IDQ GB 4ohm","price":949.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Blue \/ Box Only","offer_id":43382077587545,"sku":"PO ID 12D-S IDQ GBL None","price":379.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Blue \/ Add 2 Dual 2ohm IDQ 12\"","offer_id":43382077620313,"sku":"PO ID 12D-S IDQ GBL 2ohm","price":939.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Blue \/ Add 2 Dual 4ohm IDQ 12\"","offer_id":43382077653081,"sku":"PO ID 12D-S IDQ GBL 4ohm","price":939.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Red \/ Box Only","offer_id":43382077685849,"sku":"PO ID 12D-S IDQ GR None","price":379.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Red \/ Add 2 Dual 2ohm IDQ 12\"","offer_id":43382077718617,"sku":"PO ID 12D-S IDQ GR 2ohm","price":939.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Red \/ Add 2 Dual 4ohm IDQ 12\"","offer_id":43382077751385,"sku":"PO ID 12D-S IDQ GR 4ohm","price":939.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ White \/ Box Only","offer_id":43382077784153,"sku":"PO ID 12D-S IDQ GW None","price":379.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ White \/ Add 2 Dual 2ohm IDQ 12\"","offer_id":43382077816921,"sku":"PO ID 12D-S IDQ GW 2ohm","price":939.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ White \/ Add 2 Dual 4ohm IDQ 12\"","offer_id":43382077849689,"sku":"PO ID 12D-S IDQ GW 4ohm","price":939.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ None \/ Box Only","offer_id":43382077882457,"sku":"PO ID 12D-S IDQ G None","price":359.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ None \/ Add 2 Dual 2ohm IDQ 12\"","offer_id":43382077915225,"sku":"PO ID 12D-S IDQ G 2ohm","price":919.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ None \/ Add 2 Dual 4ohm IDQ 12\"","offer_id":43382077947993,"sku":"PO ID 12D-S IDQ G 4ohm","price":919.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/performance-optimized-dual-sealed-10-enclosure-image-dynamics-idq-10subwoofer-enclosuresproline-x-6919893.webp?v=1779355145"},{"product_id":"proline-x-performance-wedge-p12-wds-iii-sealed-enclosure-for-dual-12-subwoofers","title":"Proline X Performance Wedge P12-WDS III Sealed Enclosure for Dual 12\" Subwoofers","description":"\u003cstyle\u003e\n  .ps-wrap { font-family: 'Helvetica Neue', Arial, sans-serif; line-height: 1.8; color: #1e293b; max-width: 1200px; margin: 0 auto; background: #ffffff; }\n  .ps-hero { background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%); padding: 60px 40px; text-align: center; color: white; }\n  .ps-hero .ps-title { font-size: 2.6em; font-weight: 800; text-transform: uppercase; letter-spacing: 2px; margin: 0 0 10px 0; color: white; }\n  .ps-hero .ps-subtitle { font-size: 1.2em; font-weight: 300; opacity: 0.9; margin: 0 0 20px 0; color: white; }\n  .ps-hero .ps-meta { font-size: 0.95em; color: #67e8f9; margin: 0; letter-spacing: 1px; }\n  .ps-section { padding: 50px 40px; border-bottom: 1px solid #e2e8f0; background: #ffffff; }\n  .ps-section-alt { background: #ecfeff; }\n  .ps-section h2 { color: #155e75; font-size: 2em; font-weight: 700; margin: 0 0 20px 0; padding-bottom: 12px; border-bottom: 3px solid #06b6d4; }\n  .ps-section h3 { color: #0f172a; font-size: 1.4em; font-weight: 600; margin: 30px 0 15px 0; }\n  .ps-section p { font-size: 1.05em; margin: 0 0 18px 0; color: #334155; }\n  .ps-section strong { color: #0f172a; font-weight: 700; }\n  .ps-mdf-table { width: 100%; border-collapse: collapse; margin: 25px 0; background: #0f172a; color: #e2e8f0; border-radius: 8px; overflow: hidden; }\n  .ps-mdf-table td { padding: 14px 18px; border-bottom: 1px solid #1e293b; vertical-align: top; }\n  .ps-mdf-table tr:nth-child(even) { background: #0a1120; }\n  .ps-mdf-table tr:last-child td { border-bottom: none; }\n  .ps-mdf-table td:first-child { color: #06b6d4; font-weight: 700; white-space: nowrap; width: 25%; }\n  .ps-mdf-table td:nth-child(2) { color: white; font-weight: 700; width: 20%; }\n  .ps-mdf-table td:nth-child(3) { color: #cbd5e1; font-size: 0.95em; }\n\u003c\/style\u003e\n\u003cdiv class=\"ps-wrap\"\u003e\n\u003cdiv class=\"ps-hero\"\u003e\n\u003ch2 class=\"ps-title\"\u003eProline X P12-WDS III\u003c\/h2\u003e\n\u003cp class=\"ps-subtitle\"\u003eDual 12\" Wedge Sealed Enclosure | V3\u003c\/p\u003e\n\u003cp class=\"ps-subtitle\"\u003eEnclosure Only!\u003c\/p\u003e\n\u003cp class=\"ps-meta\"\u003e2.0 ft³ Net | Common Sealed Chamber | Wedge Profile | 8.5\" Max Depth | Langboard Elite MDF | Built in Tennessee\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ps-section\"\u003e\n\u003ch2\u003eTwo 12\" Drivers. Wedge Geometry. Common Sealed Chamber.\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eProline X P12-WDS III\u003c\/strong\u003e is the third-generation dual 12\" sealed wedge enclosure, built for installs where two drivers are required and trunk space is still a constraint. At \u003cstrong\u003e2.0 ft³ net sealed\u003c\/strong\u003e in a common chamber with a tapered profile that hugs the rear seat contour, this enclosure delivers the combined output of a dual 12\" system in a footprint that reclaims inches of upper trunk space compared to a rectangular alternative.\u003c\/p\u003e\n\u003cp\u003eThe wedge tapers from \u003cstrong\u003e13.75\" deep at the bottom to 8.5\" deep at the top\u003c\/strong\u003e, matching the natural recline angle of most modern rear seats. Position the shallow edge against the seatback and the deep edge on the trunk floor, the enclosure nestles flush against the seat naturally, eliminating the wasted triangular void that forms behind a rectangular enclosure. The \u003cstrong\u003e28\" width\u003c\/strong\u003e accommodates both drivers at correct baffle spacing. \u003cstrong\u003eInternal bracing\u003c\/strong\u003e runs throughout the common chamber to control panel resonance across the full enclosure width.\u003c\/p\u003e\n\u003cp\u003eEvery panel is CNC-cut from \u003cstrong\u003eLangboard Elite MDF\u003c\/strong\u003e to exact internal volume and assembled by hand in our Tennessee facility. Available in \u003cstrong\u003eDark Gray Trunkliner\u003c\/strong\u003e at $229.99 or \u003cstrong\u003ePlush Black\u003c\/strong\u003e at $239.99. Shipping is included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ps-section ps-section-alt\"\u003e\n\u003ch2\u003eWhy Wedge Geometry\u003c\/h2\u003e\n\u003ch3\u003eThe Problem With Rectangular Enclosures\u003c\/h3\u003e\n\u003cp\u003eModern sedan and coupe rear seats recline at 20 to 30 degrees from vertical. When a rectangular enclosure is placed against that angled surface, the bottom edge sits flush against the seat while the top edge extends straight up into the trunk, leaving a triangular air gap behind the enclosure that serves no acoustic purpose. That wasted space typically measures 2 to 4 inches at the top edge, and at 28\" wide, a dual driver rectangular enclosure wastes significantly more of your trunk than a single driver alternative.\u003c\/p\u003e\n\u003ch3\u003eThe Solution\u003c\/h3\u003e\n\u003cp\u003eThe P12-WDS III's back panel angles at approximately 20 degrees, closely matching typical rear seat recline. Position the shallow edge (8.5\") against the seatback and the deep edge (13.75\") on the trunk floor, the enclosure fills the available space correctly with no wasted void behind it. The full \u003cstrong\u003e2.0 ft³ internal airspace\u003c\/strong\u003e is preserved through optimized width and height dimensions. No acoustic compromise. Space savings only.\u003c\/p\u003e\n\u003ch3\u003eWhere The Wedge Pays Off\u003c\/h3\u003e\n\u003cp\u003eFull-size sedans running dual 12\" drivers where trunk depth is the limiting factor. Coupes and sports cars with aggressive seat recline angles and enough trunk width for a 28\" enclosure. Any dual driver install where the rectangular alternative consumes too much of the upper trunk space. The wedge format is the correct solution when you need two drivers and you still need to use your trunk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ps-section\"\u003e\n\u003ch2\u003eConstruction: Langboard Elite MDF, V-Groove And Dado Joinery\u003c\/h2\u003e\n\u003ch3\u003eLangboard Elite MDF, Named And Mill-Documented\u003c\/h3\u003e\n\u003cp\u003eEvery panel is cut from \u003cstrong\u003eLangboard Elite MDF, 3\/4\" (18mm)\u003c\/strong\u003e, a named, mill-documented panel stock produced in the United States. The specifications below are pulled directly from Langboard's published mill data.\u003c\/p\u003e\n\u003ctable class=\"ps-mdf-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDensity\u003c\/td\u003e\n\u003ctd\u003e48.5 lbs\/ft³\u003c\/td\u003e\n\u003ctd\u003eHigher density means less porosity, better screw retention, reduced resonance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Bond\u003c\/td\u003e\n\u003ctd\u003e200 psi\u003c\/td\u003e\n\u003ctd\u003eResistance to delamination under sustained bass pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModulus of Elasticity\u003c\/td\u003e\n\u003ctd\u003e410,000 psi\u003c\/td\u003e\n\u003ctd\u003ePanel stiffness under load; less flex means less resonance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFace Screw Holding\u003c\/td\u003e\n\u003ctd\u003e325 lbs\u003c\/td\u003e\n\u003ctd\u003eBaffle hardware stays locked under vibration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEdge Screw Holding\u003c\/td\u003e\n\u003ctd\u003e250 lbs\u003c\/td\u003e\n\u003ctd\u003eJoint integrity at every panel edge connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eV-Groove And Dado Joinery\u003c\/h3\u003e\n\u003cp\u003eEvery panel joint uses \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, CNC-cut interlocking grooves that mechanically lock panels before adhesive is applied. The angled back panel on a wedge enclosure presents joint geometry that simple butt joints cannot handle reliably over time. V-groove and dado joinery provides the mechanical interlocking and increased glue surface area that keeps angled joints airtight under bass pressure cycling.\u003c\/p\u003e\n\u003ch3\u003eInternal Bracing\u003c\/h3\u003e\n\u003cp\u003eAt 28\" wide, the P12-WDS III has significant unsupported panel spans. \u003cstrong\u003eInternal bracing runs throughout the common chamber\u003c\/strong\u003e to control panel resonance independently of joinery. Every structural flex point is addressed before it becomes an acoustic problem: the result is an enclosure that stays rigid and acoustically inert under sustained output from two drivers.\u003c\/p\u003e\n\u003ch3\u003eProline X Terminal Cup\u003c\/h3\u003e\n\u003cp\u003eBuilt in-house at our Tennessee facility. \u003cstrong\u003eProline X ABS\/carbon fiber terminal cup with stainless hardware and copper ring terminals\u003c\/strong\u003e, pre-wired 12g OFC speaker wire. Recessed mount keeps the cup protected from cargo contact.\u003c\/p\u003e\n\u003ch3\u003eHand-Assembled In Tennessee\u003c\/h3\u003e\n\u003cp\u003eEvery enclosure is CNC-cut on ShopSabre industrial routers and hand-assembled at our facility in Tullahoma, Tennessee. Inspected before it ships. No overseas manufacturing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ps-section ps-section-alt\"\u003e\n\u003ch2\u003eFitment Guide\u003c\/h2\u003e\n\u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 28\" W x 14.5\" H x 8.5\" D (top) \/ 13.75\" D (bottom)\u003cbr\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 2.0 ft³, common chamber\u003cbr\u003e\u003cstrong\u003eAlignment:\u003c\/strong\u003e Sealed\u003cbr\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 11.13\" x2\u003cbr\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 8.5\"\u003cbr\u003e\u003cstrong\u003eFront Panel Thickness:\u003c\/strong\u003e 0.75\" Single Baffle\u003c\/p\u003e\n\u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe P12-WDS III accommodates any 12\" subwoofer with a cutout diameter at or below \u003cstrong\u003e11.13\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e8.5\"\u003c\/strong\u003e. Both drivers share a common \u003cstrong\u003e2.0 ft³ sealed chamber\u003c\/strong\u003e. Verify published driver specs before ordering. If you need help confirming compatibility with a specific driver, contact us before purchasing.\u003c\/p\u003e\n\u003ch3\u003eInstallation Orientation\u003c\/h3\u003e\n\u003cp\u003ePosition the \u003cstrong\u003eshallow edge (8.5\") against the rear seat\u003c\/strong\u003e, with the \u003cstrong\u003edeep edge (13.75\") on the trunk floor\u003c\/strong\u003e. This is the orientation that produces the space-saving benefit, the taper follows the angle of the rear seatback, eliminating the triangular void that forms behind a rectangular enclosure. Installing with the deep edge against the seat defeats the purpose of the wedge geometry entirely. Verify orientation before final installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ps-section\"\u003e\n\u003ch2\u003eDual 12\" Sealed. Wedge Geometry. Tennessee-Built.\u003c\/h2\u003e\n\u003cp\u003eThe Proline X P12-WDS III delivers dual 12\" sealed alignment in a \u003cstrong\u003ecommon 2.0 ft³ chamber\u003c\/strong\u003e in a footprint that works with your vehicle's rear seat geometry instead of against it. \u003cstrong\u003eLangboard Elite MDF. V-groove and dado joinery. Internal bracing throughout. Proline X ABS\/carbon fiber terminal cup\u003c\/strong\u003e with stainless hardware and copper ring terminals. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n\u003cp\u003eTwo drivers. Common sealed chamber. Wedge profile. Shipping included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Grey Trunk Liner","offer_id":43491170189401,"sku":"P12D-S W G","price":229.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black Carpet","offer_id":43491170222169,"sku":"P12D-S W B","price":239.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/dual-arc-audio-x2-12-matching-proline-x-enclosure-bundle-box-50-offsubwoofer-enclosuresproline-x-6825767.png?v=1783112229"},{"product_id":"proline-x-p12d-s-w-dual-12-sealed-wedge-subwoofer-enclosure-loaded-with-arc-audio-x2v2-12","title":"Proline X P12D-S W | Dual 12\" Sealed Wedge Subwoofer Enclosure | Loaded with Arc Audio X2V2 12","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 P12D-S W Dual Chamber Sealed Wedge, Loaded\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of Arc Audio X2V2 12 drivers\u003c\/p\u003e\n\u003cdiv class=\"pl-badges\"\u003e\n\u003cspan class=\"pl-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003e2.00 cu ft Net\u003c\/span\u003e\n\u003cspan class=\"pl-badge\"\u003eFits Arc Audio X2V2 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\"\u003e2.00\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\"\u003e0.918\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 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\"\u003e6.75 in\u003c\/span\u003e\u003cspan class=\"l\"\u003eX2V2 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 Arc Audio X2V2 12\u003c\/h3\u003e\n\u003cp\u003eNothing about this box is generic. Every layer is cut to the X2V2 12's published sealed target, with the baffle bored to the X2V2 12's 11.11 in cutout, and clearance cut for its 6.75 in mounting depth.\u003c\/p\u003e\n\u003cp\u003eThe X2V2 12 carries a published \u003cstrong\u003eFs of 25.57 Hz, Qts of 0.471 and Vas of 79.36 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\u003eTwo Drivers, Two Sealed Chambers\u003c\/h3\u003e\n\u003cp\u003eA full divider splits this cabinet down the middle. Each X2V2 12 gets its own \u003cstrong\u003e1.00 cubic foot\u003c\/strong\u003e sealed volume, 2.00 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 Performance Series Construction\u003c\/h3\u003e\n\u003cp\u003eThis enclosure is cut with V-groove and dado joinery 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.\nThe panels are V-grooved and folded on the seam, then dadoed where the internal bracing lands, so every joint is a mechanical lock rather than a glue line under load.\u003c\/p\u003e\n\u003cdiv class=\"pl-grid\"\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 X2V2 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 Arc Audio X2V2 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\"\u003eArc Audio X2V2 12 D2  |  Qts 0.471  |  Fs 25.57 Hz  |  Vas 79.36 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\u003e1.00 cu ft \u003cspan class=\"pl-char\"\u003eper chamber, 2.00 cu ft total\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.918\u003c\/td\u003e\n\u003ctd\u003e49.9 Hz\u003c\/td\u003e\n\u003ctd\u003e40.9 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\"\u003eArc Audio X2V2 12 Frequency Response | Sealed, 1.00 cu ft\u003c\/p\u003e\n\u003csvg viewbox=\"0 0 680 300\" 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583.1,63.6 585.2,63.7 587.3,63.7 589.4,63.8 591.4,63.8 593.5,63.9 595.6,63.9 597.7,64.0 599.7,64.0 601.8,64.1 603.9,64.1 605.9,64.2 608.0,64.2 610.1,64.3 612.2,64.3 614.2,64.3 616.3,64.4 618.4,64.4 620.5,64.5 622.5,64.5 624.6,64.5 626.7,64.6 628.8,64.6 630.8,64.7 632.9,64.7 635.0,64.7 637.0,64.8 639.1,64.8 641.2,64.8 643.3,64.9 645.3,64.9 647.4,64.9 649.5,65.0 651.6,65.0 653.6,65.0 655.7,65.1 657.8,65.1 659.9,65.1 661.9,65.2 664.0,65.2\" 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\u003e1.00 cu ft (Qtc 0.918)\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 D2 set. The D4 X2V2 12 carries Qts 0.543 and Vas 82.65 litres, which in this same 1.00 cubic foot volume lands at \u003cstrong\u003eQtc 1.075, Fc 50.6 Hz and F3 38.6 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 1 year limited warranty, built one at a time in Tullahoma, Tennessee. Ordered loaded, the X2V2 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":"Dual 4ohm \/ Grey","offer_id":43491239690329,"sku":"P12D-S W ARC X2V2 D4 G","price":599.99,"currency_code":"USD","in_stock":true},{"title":"Dual 4ohm \/ Plush Black","offer_id":43491239723097,"sku":"P12D-S W ARC X2V2 D4 B","price":599.99,"currency_code":"USD","in_stock":true},{"title":"Dual 2 ohm \/ Grey","offer_id":43491239755865,"sku":"P12D-S W ARC X2V2 D2 G","price":599.99,"currency_code":"USD","in_stock":true},{"title":"Dual 2 ohm \/ Plush Black","offer_id":43491239788633,"sku":"P12D-S W ARC X2V2 D2 B","price":599.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/dual-arc-audio-x2-12-matching-proline-x-enclosure-bundle-box-50-offsubwoofer-enclosuresproline-x-6825767.png?v=1783112229"},{"product_id":"performance-optimized-dual-sealed-12-enclosure-arc-audio-12-arc-series","title":"Performance Optimized Dual Sealed 12\" Enclosure | Arc Audio 12\" Arc Series","description":"\u003cstyle\u003e\n  .po-wrap { font-family: 'Helvetica Neue', Arial, sans-serif; line-height: 1.8; color: #1e293b; max-width: 1200px; margin: 0 auto; background: #ffffff; }\n  .po-hero { background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%); padding: 60px 40px; text-align: center; color: white; }\n  .po-hero .po-title { font-size: 2.6em; font-weight: 800; text-transform: uppercase; letter-spacing: 2px; margin: 0 0 10px 0; color: white; }\n  .po-hero .po-subtitle { font-size: 1.2em; font-weight: 300; opacity: 0.9; margin: 0 0 30px 0; }\n  .po-badges { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 20px; }\n  .po-badge { background: rgba(6, 182, 212, 0.2); border: 1px solid #06b6d4; color: #67e8f9; padding: 8px 20px; border-radius: 20px; font-size: 0.9em; font-weight: 600; letter-spacing: 0.5px; }\n  .po-section { padding: 50px 40px; border-bottom: 1px solid #e2e8f0; background: #ffffff; }\n  .po-section:nth-child(even) { background: #f0f9ff; }\n  .po-section h2 { color: #0e7490; font-size: 2em; font-weight: 700; margin: 0 0 20px 0; padding-bottom: 12px; border-bottom: 3px solid #06b6d4; }\n  .po-section h3 { color: #0f172a; font-size: 1.4em; font-weight: 600; margin: 30px 0 15px 0; }\n  .po-section p { font-size: 1.05em; color: #334155; margin-bottom: 18px; }\n  .po-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin: 30px 0; }\n  .po-card { background: #ffffff; border: 1px solid #e2e8f0; border-top: 4px solid #06b6d4; padding: 25px; border-radius: 4px; }\n  .po-card h4 { color: #0e7490; font-size: 1.15em; font-weight: 700; margin: 0 0 12px 0; text-transform: uppercase; letter-spacing: 1px; }\n  .po-card p { font-size: 0.98em; color: #475569; margin: 0; }\n  .po-highlight { background: #f0f9ff; border-left: 4px solid #06b6d4; padding: 25px 30px; margin: 30px 0; border-radius: 4px; }\n  .po-highlight p { color: #1e293b; margin: 0; font-size: 1.05em; }\n  .po-cta { background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%); padding: 60px 40px; text-align: center; color: white; }\n  .po-cta h2 { font-size: 2.2em; font-weight: 700; margin: 0 0 20px 0; color: white; border: none; padding: 0; }\n  .po-cta p { font-size: 1.15em; opacity: 0.92; max-width: 800px; margin: 0 auto 20px auto; color: white; }\n  @media (max-width: 768px) {\n    .po-hero { padding: 40px 20px; }\n    .po-hero .po-title { font-size: 1.8em; }\n    .po-section { padding: 30px 20px; }\n    .po-section h2 { font-size: 1.6em; }\n    .po-grid { grid-template-columns: 1fr; }\n    .po-cta { padding: 40px 20px; }\n    .po-cta h2 { font-size: 1.6em; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"po-wrap\"\u003e\n\n  \u003cdiv class=\"po-hero\"\u003e\n    \u003cp class=\"po-title\"\u003ePerformance Optimized | Dual Arc Audio ARC 12\u003c\/p\u003e\n    \u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Enclosure | Driver-Specific for the Arc Audio ARC Series 12\u003c\/p\u003e\n    \u003cdiv class=\"po-badges\"\u003e\n      \u003cspan class=\"po-badge\"\u003e2.2 ft³ Net\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eCommon Chamber\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eDriver-Specific\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003e32\" × 15\" × 12\"\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eTwo Arc ARC 12s in One Engineered Cabinet\u003c\/h2\u003e\n    \u003cp\u003eThe Performance Optimized Dual Sealed 12 is a 2.2 cubic foot common-chamber sealed enclosure engineered around a pair of Arc Audio ARC Series 12\" subwoofers. Total internal airspace, baffle geometry, and bracing layout are all tuned to the ARC 12's linear excursion characteristics and 350-watt RMS power handling. Same driver-specific approach as the single Performance Optimized boxes, scaled to a properly loaded pair.\u003c\/p\u003e\n    \u003cp\u003eThe ARC Series is Arc Audio's balanced-performance line, enough motor to hit hard, enough refinement to stay musical. Two of them in a properly sized cabinet doesn't just double the output. It cuts the workload on each driver in half, drops distortion, extends thermal headroom, and gives you the effortless midbass presentation that separates a serious system from a loud one.\u003c\/p\u003e\n    \u003cdiv class=\"po-highlight\"\u003e\n      \u003cp\u003e2.2 cubic feet of net internal volume, sized specifically for a pair of Arc Audio ARC 12 drivers operating in a shared sealed environment. Each driver effectively operates against 1.1 cubic feet of airspace, the middle of Arc's specified sealed range of 0.9 to 1.25 cubic feet per driver.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eWhy More Cone Area Sounds Better, Not Just Louder\u003c\/h2\u003e\n    \u003cp\u003eDoubling the driver count isn't about hitting bigger numbers on a meter. It's about each driver doing less work to produce the same output. Two 12s playing at moderate excursion will always sound cleaner than a single 12 working hard to hit the same SPL. Lower distortion, lower thermal compression, and a presentation that sounds easier on the ears even at high listening levels.\u003c\/p\u003e\n    \u003cdiv class=\"po-grid\"\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003eTwice the Cone Area\u003c\/h4\u003e\n        \u003cp\u003eTwo Arc ARC 12s deliver roughly twice the radiating area of a single 12. That extra surface area means each driver moves less to produce the same SPL, which translates directly to lower mechanical and thermal stress on each woofer.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003e700 Watts RMS System Rating\u003c\/h4\u003e\n        \u003cp\u003eEach Arc ARC 12 handles 350 watts RMS. Power split across two drivers generates less heat per voice coil than the same total power into a single coil. Less heat means less thermal compression across long listening sessions.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003eEffortless Midbass\u003c\/h4\u003e\n        \u003cp\u003eArc Audio's linear excursion philosophy is designed for consistent performance across all volume levels. Two ARC 12s sharing the workload push that consistency further. Kick drums, bass guitar fundamentals, and vocal warmth all sit cleaner because neither driver is straining.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003eSound Quality at Volume\u003c\/h4\u003e\n        \u003cp\u003eThe biggest practical difference between one Arc ARC 12 and two: you can listen at higher volumes without the system starting to sound stressed. At any given SPL, the pair is operating well below either driver's mechanical or thermal limits.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eEngineered Around the Arc ARC 12's Parameters\u003c\/h2\u003e\n    \u003cp\u003eArc Audio specifies the ARC Series 12 for sealed enclosures between 0.9 and 1.25 cubic feet per driver. The Performance Optimized Dual Sealed 12 delivers 2.2 cubic feet total, which gives each ARC 12 access to 1.1 cubic feet of effective airspace, the middle of Arc's specified range, where the driver's linear excursion behavior and thermal characteristics both perform optimally.\u003c\/p\u003e\n    \u003ch3\u003eVolume Selection\u003c\/h3\u003e\n    \u003cp\u003e2.2 cubic feet net is the total internal volume after material thickness, bracing, and driver displacement. With two ARC 12s sharing the cabinet, each driver effectively operates against 1.1 cubic feet of air spring, the SQ-oriented middle of the ARC 12's sealed range, where Qtc lands near the ideal target for clean transient response and controlled low-end extension.\u003c\/p\u003e\n    \u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n    \u003cp\u003eBoth baffles are cut to the Arc ARC 12's exact mounting specification. Arc Audio's proprietary four-spoke stamped steel basket with compound-curve construction and integrated cooling vents drops in cleanly, with adequate internal clearance behind both magnet structures inside the 12\" deep cabinet.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n    \u003cdiv class=\"po-grid\"\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n        \u003cp\u003ePremium 3\/4\" MDF panels milled to documented spec: denser and more dimensionally stable than commodity MDF. Less panel resonance, tighter joints, and a longer service life under daily use at real power levels.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n        \u003cp\u003eCNC-cut V-grooves at every panel intersection let the cabinet fold into shape with maximum glue surface. Dado joints lock the baffle and rear panel into the side walls. No fasteners visible from outside.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003e8\/32 Threaded Inserts\u003c\/h4\u003e\n        \u003cp\u003eThreaded inserts pressed into both baffle backsides accept stainless steel mounting screws. No stripped pilot holes, no MDF damage from drywall screws, no surprises when the next driver upgrade rolls around.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n        \u003cp\u003eProline X ABS\/carbon fiber composite terminal cup, pre-wired with 12-gauge OFC inside the cabinet, with stainless steel hardware accepting both spade and banana terminations on the input side.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cp\u003eEvery panel is cut on ShopSabre CNC routers in our Tullahoma, TN facility. Tolerances that manual fabrication can't hold. Joints close cleanly, baffle concentricity stays accurate, and internal volume is consistent unit to unit. The finished cabinet weighs 45 pounds, the mass that comes from real MDF, honest construction, and no hollow corners.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eCustomize Your Build\u003c\/h2\u003e\n    \u003ch3\u003eCarpet Finish\u003c\/h3\u003e\n    \u003cp\u003e\u003cstrong\u003eDark Gray Trunkliner\u003c\/strong\u003e is the standard durable wrap, matched to most factory trunk and cargo-area carpet tones. \u003cstrong\u003ePlush Black\u003c\/strong\u003e (+$10) is a deeper, more luxurious nap that pairs well with blacked-out interiors and show builds.\u003c\/p\u003e\n    \u003ch3\u003eAcrylic Insert Color\u003c\/h3\u003e\n    \u003cp\u003eChoose \u003cstrong\u003eBlack, Blue, Red, or White\u003c\/strong\u003e for the baffle inserts to match your build. Or skip the inserts entirely (-$40) for a clean, understated look. The inserts are purely cosmetic. Performance is identical across colors.\u003c\/p\u003e\n    \u003ch3\u003eBox-Only or Loaded Pair\u003c\/h3\u003e\n    \u003cp\u003eAdd a matched pair of \u003cstrong\u003eDual 2-ohm\u003c\/strong\u003e or \u003cstrong\u003eDual 4-ohm\u003c\/strong\u003e Arc Audio ARC 12 drivers directly to your order and we'll ship the complete loaded system, ready to wire to your amplifier. Already own your ARC 12s? Order the enclosure box-only and drop in the drivers you have.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eWiring Two Arc ARC 12s to Your Amplifier\u003c\/h2\u003e\n    \u003cp\u003eBoth drivers share a single terminal cup, pre-wired with 12-gauge OFC for clean signal transfer. The wiring configuration depends on the impedance version of the ARC 12s you run and what your amplifier is stable at.\u003c\/p\u003e\n    \u003ch3\u003eTwo Dual 2-Ohm Arc ARC 12s\u003c\/h3\u003e\n    \u003cp\u003eEach driver's coils in parallel = 1 ohm per driver. Two 1-ohm drivers in series = 2 ohms combined. Two 1-ohm drivers in parallel = 0.5 ohm combined (most monoblock amps won't handle this. Verify your amp's stable load).\u003c\/p\u003e\n    \u003ch3\u003eTwo Dual 4-Ohm Arc ARC 12s\u003c\/h3\u003e\n    \u003cp\u003eEach driver's coils in parallel = 2 ohms per driver. Two 2-ohm drivers in parallel = 1 ohm combined. Two 2-ohm drivers in series = 4 ohms combined. The Dual 4-ohm version is the more flexible option for most amplifier setups.\u003c\/p\u003e\n    \u003cp\u003eArc Audio manufactures monoblock amplifiers engineered to pair specifically with their subwoofer lineup, the Arc Audio XD Series and Mini Series monoblocks in the 700-800 watt RMS range give you a fully matched system. Any quality monoblock stable at your chosen impedance will also work well.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n    \u003cp\u003eEvery Performance Optimized enclosure is CNC-cut, assembled, and finished in our Tullahoma, TN facility. Components are pulled from inventory after your order is placed, then bonded and wrapped, a 2 to 5 business day assembly window before the box ships. No pre-built inventory sitting in warehouses, warping in storage. Each unit is built to order.\u003c\/p\u003e\n    \u003cp\u003eBacked by a 1-year limited warranty against structural failure and hardware defects. Questions on fitment, wiring, or amplifier pairing? \u003ca href=\"\/pages\/contact-us\"\u003eContact us\u003c\/a\u003e, we install this gear ourselves, in our own vehicles.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-cta\"\u003e\n    \u003ch2\u003eTwo Arc ARC 12s, Done Right\u003c\/h2\u003e\n    \u003cp\u003eDriver-specific airspace sized for a pair, Performance Series construction, and the option to bundle a matched pair of Arc Audio ARC 12 drivers in one order. The Performance Optimized Dual Sealed 12 is the cabinet Arc's ARC Series 12s were engineered to live in.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Plush Black \/ Black","offer_id":43493596823641,"sku":"PO ARC 12D-S BB none","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Blue","offer_id":43493596921945,"sku":"PO ARC 12D-S BBL none","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Red","offer_id":43493597020249,"sku":"PO ARC 12D-S BR none","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ White","offer_id":43493597118553,"sku":"PO ARC 12D-S  BW none","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ None","offer_id":43493597216857,"sku":"PO ARC 12D-S B none","price":369.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Black","offer_id":43493597315161,"sku":"PO ARC 12D-S GB None","price":379.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Blue","offer_id":43493597413465,"sku":"PO ARC 12D-S GBL None","price":379.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ Red","offer_id":43493597511769,"sku":"PO ARC 12D-S GR None","price":379.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ White","offer_id":43493597610073,"sku":"PO ARC 12D-S GW None","price":379.99,"currency_code":"USD","in_stock":true},{"title":"Dark Gray Trunkliner \/ None","offer_id":43493597708377,"sku":"PO ARC 12D-S G None","price":359.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/performance-optimized-dual-sealed-10-enclosure-arc-audio-10-arc-seriessubwoofer-enclosuresproline-x-4109294.webp?v=1783112230"},{"product_id":"performance-optimized-sealed-dual-12-enclosure-stereo-integrity-12-sql-series","title":"Performance Optimized Sealed Dual 12\" Enclosure | Stereo Integrity SQL-12","description":"\u003cstyle\u003e\n  .po-wrap { font-family: 'Helvetica Neue', Arial, sans-serif; line-height: 1.8; color: #1e293b; max-width: 1200px; margin: 0 auto; background: #ffffff; }\n  .po-hero { background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%); padding: 60px 40px; text-align: center; color: white; }\n  .po-hero .po-title { font-size: 2.6em; font-weight: 800; text-transform: uppercase; letter-spacing: 2px; margin: 0 0 10px 0; color: white; }\n  .po-hero .po-subtitle { font-size: 1.2em; font-weight: 300; opacity: 0.9; margin: 0 0 30px 0; }\n  .po-badges { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 20px; }\n  .po-badge { background: rgba(6, 182, 212, 0.2); border: 1px solid #06b6d4; color: #67e8f9; padding: 8px 20px; border-radius: 20px; font-size: 0.9em; font-weight: 600; letter-spacing: 0.5px; }\n  .po-section { padding: 50px 40px; border-bottom: 1px solid #e2e8f0; background: #ffffff; }\n  .po-section:nth-child(even) { background: #f0f9ff; }\n  .po-section h2 { color: #0e7490; font-size: 2em; font-weight: 700; margin: 0 0 20px 0; padding-bottom: 12px; border-bottom: 3px solid #06b6d4; }\n  .po-section h3 { color: #0f172a; font-size: 1.4em; font-weight: 600; margin: 30px 0 15px 0; }\n  .po-section p { font-size: 1.05em; color: #334155; margin-bottom: 18px; }\n  .po-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin: 30px 0; }\n  .po-card { background: #ffffff; border: 1px solid #e2e8f0; border-top: 4px solid #06b6d4; padding: 25px; border-radius: 4px; }\n  .po-card h4 { color: #0e7490; font-size: 1.15em; font-weight: 700; margin: 0 0 12px 0; text-transform: uppercase; letter-spacing: 1px; }\n  .po-card p { font-size: 0.98em; color: #475569; margin: 0; }\n  .po-highlight { background: #f0f9ff; border-left: 4px solid #06b6d4; padding: 25px 30px; margin: 30px 0; border-radius: 4px; }\n  .po-highlight p { color: #1e293b; margin: 0; font-size: 1.05em; }\n  .po-cta { background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%); padding: 60px 40px; text-align: center; color: white; }\n  .po-cta h2 { font-size: 2.2em; font-weight: 700; margin: 0 0 20px 0; color: white; border: none; padding: 0; }\n  .po-cta p { font-size: 1.15em; opacity: 0.92; max-width: 800px; margin: 0 auto 20px auto; color: white; }\n  @media (max-width: 768px) {\n    .po-hero { padding: 40px 20px; }\n    .po-hero .po-title { font-size: 1.8em; }\n    .po-section { padding: 30px 20px; }\n    .po-section h2 { font-size: 1.6em; }\n    .po-grid { grid-template-columns: 1fr; }\n    .po-cta { padding: 40px 20px; }\n    .po-cta h2 { font-size: 1.6em; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"po-wrap\"\u003e\n\n  \u003cdiv class=\"po-hero\"\u003e\n    \u003cp class=\"po-title\"\u003ePerformance Optimized | Dual Stereo Integrity SQL 12\u003c\/p\u003e\n    \u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Enclosure | Isolated Chambers | Dual Mounting Face for the SQL 12 Series 2\u003c\/p\u003e\n    \u003cdiv class=\"po-badges\"\u003e\n      \u003cspan class=\"po-badge\"\u003e2.0 ft³ Net Total\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eIsolated Chambers\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003e1.0 ft³ Per Chamber\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003e31\" × 15\" × 13.625\"\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eDouble Baffle\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eV-Groove \/ Dado\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eTwo Stereo Integrity SQL 12s, Each in Their Own Engineered Chamber\u003c\/h2\u003e\n    \u003cp\u003eThe Performance Optimized Dual Sealed 12 for the Stereo Integrity SQL 12 is a fully chambered sealed enclosure engineered around a pair of SQL 12 Series 2 subwoofers. Two isolated 1.0 cubic foot chambers, separated by a center divider, each tuned to the SQL 12's published Thiele-Small parameters. Dual mounting face design gives each driver its own dedicated baffle. No shared airspace, no acoustic crosstalk between drivers, no compromise from doubling up in a common chamber.\u003c\/p\u003e\n    \u003cp\u003eThis is not the same construction as our common-chamber PO duals. The SQL 12 is a serious high-power driver. 1000 watts RMS per unit, 26mm one-way linear Xmax, and enough motor force to move meaningful air. At those power and excursion levels, isolated chambers stop being nice-to-have and become the correct engineering answer. Each SQL 12 operates in its own dedicated acoustic environment, unaffected by what the other driver is doing at any given moment.\u003c\/p\u003e\n    \u003cdiv class=\"po-highlight\"\u003e\n      \u003cp\u003eEach SQL 12 gets its own sealed 1.0 cubic foot chamber, the maximum sealed volume Stereo Integrity specifies for the SQL 12 Series 2. The chambered design means each driver operates as if it were in its own dedicated single enclosure, with a center divider that also serves as structural bracing.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eWhy Isolated Chambers Matter at This Power Level\u003c\/h2\u003e\n    \u003cp\u003eFor lower-power dual subwoofer systems in the 300-500 watt per driver range, a common chamber works fine. Matched driver pairs load symmetrically, and shared airspace introduces minimal interaction. At the SQL 12's 1000 watt RMS per driver rating, the calculation changes. Higher power means more cone excursion, more thermal load, and more asymmetric behavior between the two drivers as they respond to different thermal and mechanical states in real time. Isolated chambers eliminate that variable entirely.\u003c\/p\u003e\n    \u003cdiv class=\"po-grid\"\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003eSymmetric Loading Under Real Power\u003c\/h4\u003e\n        \u003cp\u003eEach SQL 12 operates against its own dedicated 1.0 cubic foot airspace. If one driver's voice coil resistance rises from heat faster than the other, or if one driver breaks in at a slightly different rate, the pair still performs consistently because they aren't coupled through shared air.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003eForce Cancellation Benefits\u003c\/h4\u003e\n        \u003cp\u003eThe dual mounting face design creates opposing forces that partially cancel through the cabinet structure. Less mechanical energy transferred to the vehicle chassis, less rattle in trim panels, and cleaner perceived output because the cabinet itself is doing less unwanted work.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003eStructural Rigidity\u003c\/h4\u003e\n        \u003cp\u003eThe center divider acts as a full-length brace in addition to its acoustic role. The 31\" cabinet width is split into two 15.5\" panel sections structurally, dramatically reducing panel flex compared to an unbraced wide interior at the power levels the SQL 12 delivers.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003ePredictable Behavior at Full Excursion\u003c\/h4\u003e\n        \u003cp\u003eThe SQL 12's 26mm one-way Xmax means significant air displacement per stroke. Isolated chambers guarantee each driver's air spring stays consistent through the full excursion range, without pressure variations from the second driver influencing the first.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eEngineered Around the SQL 12's Parameters\u003c\/h2\u003e\n    \u003cp\u003eStereo Integrity specifies the SQL 12 Series 2 for sealed enclosures between 0.65 and 1.0 cubic feet per driver. The Performance Optimized Dual Sealed 12 delivers 1.0 cubic foot per chamber, the upper end of SI's specified range, where the SQL's deep low-end extension characteristics fully develop. In a properly sized cabinet, the SQL 12 plays down to F3 points in single-digit territory, delivering the low-frequency response that makes SI's SQL series unmatched at its price point.\u003c\/p\u003e\n    \u003ch3\u003eVolume Selection\u003c\/h3\u003e\n    \u003cp\u003e1.0 cubic foot per chamber is the maximum of SI's recommended sealed volume range. Smaller volumes tighten Qtc and lose some low-end extension. Larger volumes fall outside SI's specification and compromise transient control. 1.0 cubic foot per driver is where the SQL 12 delivers on its full low-end capability while staying inside the driver's engineered operating window.\u003c\/p\u003e\n    \u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n    \u003cp\u003eBoth baffles are cut to the SQL 12's exact 11.33\" cutout specification and doubled to 1.5\" total thickness at the mounting position. The SQL 12's 7\" mounting depth leaves comfortable internal clearance inside the 13.625\" deep cabinet. Each driver has its own dedicated mounting face, a true dual-face design that separates the two drivers acoustically and mechanically, with 8\/32 threaded inserts pressed into the doubled baffle stock for secure, full-depth mounting.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n    \u003cdiv class=\"po-grid\"\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003eDouble Baffle Mounting Faces\u003c\/h4\u003e\n        \u003cp\u003eEach of the two mounting faces uses a doubled 1.5\" total baffle thickness: two layers of 3\/4\" Langboard Elite MDF bonded together at the driver mounting position. Doubled baffle stock resists baffle flex and mounting screw pullout at the power levels the SQL 12 delivers.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003e8\/32 Threaded Inserts Into Double Baffle\u003c\/h4\u003e\n        \u003cp\u003eBoth baffles use 8\/32 threaded inserts pressed into the doubled 1.5\" MDF backside, providing full-depth thread engagement for the supplied stainless steel mounting screws. No stripped pilot holes, no MDF damage from drywall screws, and secure retention at high excursion levels.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n        \u003cp\u003eCNC-cut V-grooves at every panel intersection let the cabinet fold into shape with maximum glue surface. Dado joints lock the doubled baffles, rear panel, and center divider into the side walls, no fasteners visible from outside, no exposed end grain at joints.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003ePre-Wired Terminal Cups (×2)\u003c\/h4\u003e\n        \u003cp\u003eOne Proline X ABS\/carbon fiber composite terminal cup per chamber, each pre-wired with 12-gauge OFC. Wire each driver to its own amp channel for maximum control, or jumper the cups externally for a single-channel pair.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cp\u003eEvery panel is cut on ShopSabre CNC routers in our Tullahoma, TN facility. The center divider is dadoed into the top, bottom, and rear panels for maximum mechanical lock, not just glued in. Both mounting baffles are doubled to 1.5\" total thickness at the mounting positions. Internal volume is verified per chamber on every unit.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eCustomize Your Build\u003c\/h2\u003e\n    \u003ch3\u003eCarpet Finish\u003c\/h3\u003e\n    \u003cp\u003e\u003cstrong\u003eDark Gray Trunkliner\u003c\/strong\u003e is the standard durable wrap, matched to most factory trunk and cargo-area carpet tones. \u003cstrong\u003ePlush Black\u003c\/strong\u003e (+$10) is a deeper, more luxurious nap that pairs well with blacked-out interiors and show builds.\u003c\/p\u003e\n    \u003ch3\u003eAcrylic Insert Color\u003c\/h3\u003e\n    \u003cp\u003eChoose \u003cstrong\u003eBlack, Blue, Red, or White\u003c\/strong\u003e for the baffle inserts to match your build. Or skip the inserts entirely (-$40) for a clean, understated look. The inserts are purely cosmetic. Performance is identical across colors.\u003c\/p\u003e\n    \u003ch3\u003eBox-Only or Loaded Pair\u003c\/h3\u003e\n    \u003cp\u003eAdd a matched pair of Stereo Integrity SQL 12 Series 2 drivers directly to your order in \u003cstrong\u003eDual 2-ohm or Dual 4-ohm\u003c\/strong\u003e and \u003cstrong\u003ePaper or Carbon Fiber\u003c\/strong\u003e dust cap configurations. Already own your SQL 12s? Order the enclosure box-only and drop in the drivers you have.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eWiring Two SQL 12s to Your Amplifier\u003c\/h2\u003e\n    \u003cp\u003eEach chamber has its own dedicated terminal cup, pre-wired with 12-gauge OFC. The two cups can be jumpered externally for a single-amp installation, or wired independently for dual monoblock or multi-channel amplifier setups.\u003c\/p\u003e\n    \u003ch3\u003eTwo Dual 2-Ohm SQL 12s\u003c\/h3\u003e\n    \u003cp\u003eEach driver's coils in parallel = 1 ohm per driver. Two 1-ohm drivers in parallel = 0.5 ohm combined (most monoblocks won't handle this. Verify your amp). Two 1-ohm drivers in series = 2 ohms combined. Each driver on its own monoblock at 1 ohm gives you the cleanest high-power setup.\u003c\/p\u003e\n    \u003ch3\u003eTwo Dual 4-Ohm SQL 12s\u003c\/h3\u003e\n    \u003cp\u003eEach driver's coils in parallel = 2 ohms per driver. Two 2-ohm drivers in parallel = 1 ohm combined. Two 2-ohm drivers in series = 4 ohms combined. Dual 4-ohm is the more flexible option for most amplifier setups at these power levels.\u003c\/p\u003e\n    \u003cp\u003eThe SQL 12 pair is rated for 2000 watts RMS combined. Aim for a clean, well-regulated amplifier or amplifier pair delivering 1500 to 2000 watts total at your chosen impedance. At this power level, amplifier quality matters more than headline numbers, regulated power supply, low THD, and honest RMS ratings.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n    \u003cp\u003eEvery Performance Optimized enclosure is CNC-cut, assembled, and finished in our Tullahoma, TN facility. Components are pulled from inventory after your order is placed, then bonded and wrapped, a 2 to 5 business day assembly window before the box ships. No pre-built inventory sitting in warehouses, warping in storage. Each unit is built to order.\u003c\/p\u003e\n    \u003cp\u003eBacked by a 1-year limited warranty against structural failure and hardware defects. Questions on fitment, wiring, or amplifier pairing? \u003ca href=\"\/pages\/contact-us\"\u003eContact us\u003c\/a\u003e, we install this gear ourselves, in our own vehicles.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-cta\"\u003e\n    \u003ch2\u003eTwo SQL 12s, Engineered Correctly\u003c\/h2\u003e\n    \u003cp\u003eIsolated chamber design, dual mounting face, driver-specific 1.0 cubic foot chambers, and Performance Series construction built for the power levels the SQL 12 delivers. The correct cabinet for a serious pair of SIs.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Plush Black \/ Black","offer_id":43786903289945,"sku":"PO12D-S SI BB","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Blue","offer_id":43786903322713,"sku":"PO12D-S SI BBL","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Red","offer_id":43786903355481,"sku":"PO12D-S SI BR","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ White","offer_id":43786903388249,"sku":"PO12D-S SI BW","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ None","offer_id":43786903421017,"sku":"PO12D-S SI B","price":359.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/performance-optimized-sealed-dual-12-enclosure-stereo-integrity-12-sql-seriessubwoofer-enclosuresproline-x-3250530.png?v=1784976188"},{"product_id":"proline-x-po-12d-s-w-gus-dual-12-sealed-wedge-subwoofer-enclosure-built-for-resonix-gus-12","title":"Performance Optimized Wedge Sealed Dual 12\" Shallow Sub Enclosure | ResoNix GUS-12","description":"\u003cdiv class=\"pow-wrap\"\u003e\n\u003cstyle\u003e\n.pow-wrap{font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Helvetica,Arial,sans-serif;line-height:1.7;color:#cbd5e1 !important;}\n.pow-wrap p{color:#cbd5e1 !important;margin:0 0 14px 0;}\n.pow-wrap strong{color:#d99058 !important;}\n.pow-wrap a{color:#c68a4a !important;font-weight:700;text-decoration:underline;}\n.pow-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%) !important;border-radius:8px;padding:32px 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!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.pow-warn h3{color:#fbbf24 !important;margin:0 0 10px 0;}\n.pow-warn p{color:#fde68a !important;margin:0 0 10px 0;}\n.pow-warn p:last-child{margin-bottom:0;}\n.pow-warn strong{color:#fbbf24 !important;}\n.pow-card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:24px 0;}\n@media(max-width:600px){.pow-card-grid{grid-template-columns:1fr;}}\n.pow-card{background:#1a2740 !important;border:1px solid #4a3520 !important;border-top:3px solid #b87333 !important;border-radius:6px;padding:22px;}\n.pow-card-label{display:inline-block;background:#b87333 !important;color:#2a1608 !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.pow-card h4{margin:0 0 10px 0;}\n.pow-card-divider{height:2px;background:#b87333 !important;width:32px;margin-bottom:12px;border-radius:2px;}\n.pow-card p{font-size:0.93em;color:#b6c4d6 !important;margin:0;line-height:1.65;}\n.pow-card p strong{color:#d99058 !important;}\n.pow-table{width:100% !important;border-collapse:collapse;margin:22px 0;font-size:0.94em;}\n.pow-table th{background:#8b5a2b !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 #3a2818 !important;}\n.pow-table td{padding:10px 14px;border-bottom:1px solid #3a2818 !important;color:#dbe4ef !important;background:#111c30 !important;}\n.pow-table tr:nth-child(even) td{background:#1a2740 !important;}\n.pow-table td:first-child{font-weight:600;color:#d99058 !important;width:30%;}\n.pow-chartbox{display:block !important;width:100% !important;max-width:100% !important;margin:22px 0 !important;}\n.pow-chart{display:block !important;width:100% !important;max-width:100% !important;height:auto !important;}\n.pow-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%) !important;border-radius:8px;padding:28px 26px;margin:32px 0 0 0;text-align:center;}\n.pow-cta h3{color:#ffffff !important;margin:0 0 10px 0;}\n.pow-cta p{color:#e2e8f0 !important;margin:0;font-size:0.97em;}\n\u003c\/style\u003e\n\n\u003cdiv class=\"pow-hero\"\u003e\n\u003cspan class=\"pow-eyebrow\"\u003eProline X | Performance Optimized Wedge\u003c\/span\u003e\n\u003ch2\u003eTwo GUS-12s, Each in Its Own 0.75 Cubic Feet.\u003c\/h2\u003e\n\u003cp\u003eA dual chamber sealed wedge cut for the ResoNix GUS-12 and nothing else. It sits in the trunk with the tall face against the back of the rear seat and the drivers firing rearward, using the length of the trunk instead of standing in the middle of it.\u003c\/p\u003e\n\u003cdiv class=\"pow-badges\"\u003e\n\u003cspan class=\"pow-badge\"\u003e0.75 CU FT NET PER DRIVER\u003c\/span\u003e\n\u003cspan class=\"pow-badge\"\u003eDUAL CHAMBER\u003c\/span\u003e\n\u003cspan class=\"pow-badge\"\u003eQTC 0.719\u003c\/span\u003e\n\u003cspan class=\"pow-badge\"\u003eTRUNK MOUNT, REAR FIRING\u003c\/span\u003e\n\u003cspan class=\"pow-badge\"\u003e1600W RMS COMBINED\u003c\/span\u003e\n\u003cspan class=\"pow-badge\"\u003eBUILT IN TULLAHOMA, TN\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pow-warn\"\u003e\n\u003cspan class=\"pow-warn-label\"\u003eRead This First\u003c\/span\u003e\n\u003ch3\u003eThis Is Not a Down Fire Enclosure\u003c\/h3\u003e\n\u003cp\u003eThe wedge works in one orientation: tall face flat against the rear seat back, taper running out toward the trunk lid, drivers firing rearward. There are no feet, no baffle clearance gap, and \u003cstrong\u003eno down fire option on this cabinet\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIt is cut direct fit to the GUS-12 at a 283.6mm opening. \u003cstrong\u003eA standard 12 will not fit\u003c\/strong\u003e, and would not see the correct airspace if it did.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pow-section\"\u003e\n\u003ch3\u003eBuilt Backward From One Published Number\u003c\/h3\u003e\n\u003cp\u003eResoNix specifies \u003cstrong\u003e0.75 cubic feet of net acoustic airspace\u003c\/strong\u003e per GUS-12, the volume that produces a maximally flat sealed alignment. Each chamber here is built at \u003cstrong\u003e0.80 cubic feet gross\u003c\/strong\u003e. Subtract the driver's 0.046 cubic feet of displacement and each GUS-12 sees 0.754 cubic feet.\u003c\/p\u003e\n\u003cp\u003eThat is not close to the target. That is the target. Total gross volume across both chambers is 1.60 cubic feet, 1.508 net acoustic.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pow-section-alt\"\u003e\n\u003ch3\u003eWhy a Wedge\u003c\/h3\u003e\n\u003cdiv class=\"pow-card-grid\"\u003e\n\u003cdiv class=\"pow-card\"\u003e\n\u003cspan class=\"pow-card-label\"\u003ePackaging\u003c\/span\u003e\u003cdiv class=\"pow-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eIt Uses the Trunk Lengthwise\u003c\/h4\u003e\n\u003cp\u003eTall face against the rear seat, tapering down as it runs out toward the lid. The cabinet claims the deep space at the base of the trunk and gives height back where the lid closes, so \u003cstrong\u003eyou keep usable trunk\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-card\"\u003e\n\u003cspan class=\"pow-card-label\"\u003eLoading\u003c\/span\u003e\u003cdiv class=\"pow-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eThe Trunk Is Part of the System\u003c\/h4\u003e\n\u003cp\u003eFiring rearward means output loads into the trunk volume and reaches the cabin through the rear seat and deck. That path is what gives a trunk mounted subwoofer its weight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-card\"\u003e\n\u003cspan class=\"pow-card-label\"\u003eLocalization\u003c\/span\u003e\u003cdiv class=\"pow-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eHarder to Point At\u003c\/h4\u003e\n\u003cp\u003eBecause the drivers do not radiate straight into the cabin, the low end arrives through the structure rather than as a beam from behind your head, which makes \u003cstrong\u003ekeeping the stage forward\u003c\/strong\u003e easier.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-card\"\u003e\n\u003cspan class=\"pow-card-label\"\u003eSeparation\u003c\/span\u003e\u003cdiv class=\"pow-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eTwo Sealed Chambers\u003c\/h4\u003e\n\u003cp\u003eA full divider gives each GUS-12 its own airspace. \u003cstrong\u003eNeither cone loads against the other\u003c\/strong\u003e, so the pair stays predictable when both are working hard.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pow-section\"\u003e\n\u003ch3\u003eDual Chamber, Not Common Chamber\u003c\/h3\u003e\n\u003cp\u003eEach GUS-12 loads into its own sealed 0.80 cubic foot chamber, isolated by a full divider. With separate chambers, one driver's cone motion does not modulate the air load the other driver sees, so the two stay acoustically independent under hard excursion.\u003c\/p\u003e\n\u003cp\u003eThe GUS-12 is rated at \u003cstrong\u003e800 watts RMS each in its suggested enclosure\u003c\/strong\u003e, so this cabinet is built around a 1600 watt pair. A single Proline X terminal cup is side mounted and pre wired with 12 gauge OFC. This is a raw enclosure, so how you wire the drivers from that cup is your call.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pow-section-alt\"\u003e\n\u003ch3\u003eHow It Is Built\u003c\/h3\u003e\n\u003cdiv class=\"pow-highlight\"\u003e\n\u003ch3\u003eCabinet\u003c\/h3\u003e\n\u003cp\u003eCut on our ShopSabre CNC from Langboard Elite MDF and assembled with \u003cstrong\u003edado and V groove joinery\u003c\/strong\u003e over 0.75 inch panels, with a \u003cstrong\u003edouble baffle at 1.5 inches\u003c\/strong\u003e and a full chamber divider. Angled panel meets are cut as V joints so the faces close on a machined bevel rather than a filled seam.\u003c\/p\u003e\n\u003ch3\u003eMounting Pattern\u003c\/h3\u003e\n\u003cp\u003eThe GUS-12 is in the Proline X CAD library, drawn from the manufacturer's own STEP file. The 283.6mm cutout and the nutsert locations are machined in the same operation from the same origin, so the holes cannot drift relative to each other. \u003cstrong\u003e8\/32 threaded inserts installed at both driver positions\u003c\/strong\u003e with stainless machine screws supplied, matched to the driver's 304mm bolt circle and its eight 6.5mm holes.\u003c\/p\u003e\n\u003ch3\u003eWiring and Damping\u003c\/h3\u003e\n\u003cp\u003eOne Proline X ABS and carbon fiber composite terminal cup, side mounted, pre wired with 12 gauge OFC to both driver positions. Polyfill is installed as a light wall lining to control internal reflections without altering the acoustic volume, because adding fill density would shift the alignment off the 0.75 target.\u003c\/p\u003e\n\u003ch3\u003eFinish\u003c\/h3\u003e\n\u003cp\u003ePlush black carpet with a black acrylic badge on the woofer face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pow-section\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eExternal dimensions are \u003cstrong\u003e30.25 inches wide by 15 inches tall\u003c\/strong\u003e, with depth running \u003cstrong\u003e13.5 inches at the base tapering to 8 inches at the top\u003c\/strong\u003e. Maximum driver mounting depth is 7.5 inches, comfortable for the GUS-12's 115.3mm requirement.\u003c\/p\u003e\n\u003cdiv class=\"pow-alert\"\u003e\u003cp\u003e\u003cstrong\u003eFront clearance.\u003c\/strong\u003e ResoNix specifies 28mm minimum clearance in front of each GUS-12. At more than 20mm of Klippel verified one way excursion that is the operational envelope of the suspension, not optional headroom. Since the drivers fire rearward into the trunk, anything you load behind the box has to stay outside that envelope. Verify both positions independently.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pow-section\"\u003e\n\u003ch3\u003eEnclosure Performance\u003c\/h3\u003e\n\u003cp\u003eCalculated from ResoNix's published Klippel measured parameters for the GUS-12 D4 coil: \u003cstrong\u003eFs 14.54 Hz, Qts 0.28, Vas 119.35 litres\u003c\/strong\u003e. Nothing here is estimated.\u003c\/p\u003e\n\u003ctable class=\"pow-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eNet Volume Per Driver\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003cth\u003eCharacter\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.45 cu ft, ResoNix minimum\u003c\/td\u003e\n\u003ctd\u003e0.901\u003c\/td\u003e\n\u003ctd\u003e46.8 Hz\u003c\/td\u003e\n\u003ctd\u003e38.8 Hz\u003c\/td\u003e\n\u003ctd\u003ePunchier, more upper bass\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;\"\u003e0.75 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;\"\u003e0.719\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e37.3 Hz\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e36.7 Hz\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003eMaximally flat. The target.\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.50 cu ft, ResoNix maximum\u003c\/td\u003e\n\u003ctd\u003e0.547\u003c\/td\u003e\n\u003ctd\u003e28.4 Hz\u003c\/td\u003e\n\u003ctd\u003e38.9 Hz\u003c\/td\u003e\n\u003ctd\u003eBelow Butterworth, xmax limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv class=\"pow-chartbox\"\u003e\n\u003csvg class=\"pow-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=\"#4a3520\" stroke-width=\"1\"\u003e\u003c\/rect\u003e\n\u003cline x1=\"210\" y1=\"50\" x2=\"210\" y2=\"350\" stroke=\"#3a2818\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003cline x1=\"379\" y1=\"50\" x2=\"379\" y2=\"350\" stroke=\"#3a2818\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003cline x1=\"592\" y1=\"50\" x2=\"592\" y2=\"350\" stroke=\"#3a2818\" stroke-width=\"1\"\u003e\u003c\/line\u003e\n\u003cline x1=\"881\" y1=\"50\" x2=\"881\" y2=\"350\" stroke=\"#3a2818\" 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=\"90,350 112,350 135,350 158,350 180,344 202,329 225,314 248,300 270,285 292,271 315,256 338,242 360,227 382,213 405,200 428,187 450,174 472,162 495,151 518,141 540,132 562,124 585,118 608,112 630,108 652,105 675,103 698,101 720,100 742,100 765,100 788,100 810,100 832,100 855,101 878,102 900,102 922,103 945,103 968,104 990,104 1012,105 1035,105 1058,106 1080,106 1102,106 1125,107 1148,107 1170,107\" fill=\"none\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/polyline\u003e\n\u003cpolyline points=\"90,301 112,289 135,278 158,267 180,257 202,247 225,237 248,228 270,219 292,210 315,202 338,195 360,187 382,181 405,174 428,169 450,163 472,158 495,154 518,149 540,146 562,142 585,139 608,136 630,133 652,131 675,129 698,127 720,125 742,124 765,122 788,121 810,120 832,119 855,118 878,117 900,116 922,116 945,115 968,115 990,114 1012,114 1035,113 1058,113 1080,113 1102,112 1125,112 1148,112 1170,112\" fill=\"none\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/polyline\u003e\n\u003cpolyline points=\"90,349 112,335 135,322 158,308 180,295 202,281 225,268 248,255 270,243 292,231 315,219 338,207 360,197 382,186 405,177 428,168 450,160 472,152 495,146 518,140 540,135 562,130 585,127 608,124 630,121 652,119 675,117 698,116 720,114 742,113 765,113 788,112 810,112 832,111 855,111 878,111 900,110 922,110 945,110 968,110 990,110 1012,110 1035,110 1058,110 1080,110 1102,110 1125,110 1148,110 1170,110\" fill=\"none\" stroke=\"#c68a4a\" stroke-width=\"4.5\"\u003e\u003c\/polyline\u003e\n\u003ctext x=\"202\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e20\u003c\/text\u003e\n\u003ctext x=\"371\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e30\u003c\/text\u003e\n\u003ctext x=\"584\" y=\"375\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e50\u003c\/text\u003e\n\u003ctext x=\"869\" 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=\"#c68a4a\" 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=\"#d99058\" font-family=\"sans-serif\" font-weight=\"700\"\u003eResoNix GUS-12, per driver. Anechoic half-space, no cabin gain.\u003c\/text\u003e\n\u003cline x1=\"800\" y1=\"255\" x2=\"850\" y2=\"255\" stroke=\"#c68a4a\" stroke-width=\"4.5\"\u003e\u003c\/line\u003e\n\u003ctext x=\"862\" y=\"261\" font-size=\"16\" fill=\"#e2e8f0\" font-family=\"sans-serif\" font-weight=\"700\"\u003e0.75 cu ft, this enclosure\u003c\/text\u003e\n\u003cline x1=\"800\" y1=\"287\" x2=\"850\" y2=\"287\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/line\u003e\n\u003ctext x=\"862\" y=\"293\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e0.45 cu ft and 1.50 cu ft\u003c\/text\u003e\n\u003c\/svg\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pow-alert\"\u003e\u003cp\u003e\u003cstrong\u003eLook at the F3 column, not the Qtc column.\u003c\/strong\u003e Across the entire usable range, from ResoNix's minimum 0.45 up to their maximum 1.5 cubic feet, \u003cstrong\u003eF3 never leaves the 36 to 39 Hz band\u003c\/strong\u003e. Enclosure volume on this driver changes the shape of the response, not how deep it plays. That falls straight out of a 14.5 Hz Fs paired with a 0.28 Qts, which is an unusually low pair for a 12.\u003c\/p\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"pow-alert\"\u003e\u003cp\u003e\u003cstrong\u003eWhy not build bigger.\u003c\/strong\u003e ResoNix notes that at their 1.5 cubic foot maximum, the GUS-12 reaches xmax at 20 Hz with only 500 watts, well under its 800 watt rating. The larger box trades away power handling for damping and gains nothing on the bottom end. At 0.75 the driver takes its full rated power.\u003c\/p\u003e\u003c\/div\u003e\n\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=\"pow-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=\"pow-cta\"\u003e\n\u003ch3\u003eCut for the GUS-12. Built in Tennessee.\u003c\/h3\u003e\n\u003cp\u003eEnclosure only. The ResoNix GUS-12 drivers are purchased separately from ResoNix Sound Solutions. Built to order in Tullahoma, Tennessee on our own CNC equipment. Questions on fitment or amplifier matching, call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Plush Black","offer_id":44493052379225,"sku":"PO 12D-S W GUS","price":399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12D-SGUSFront.jpg?v=1787515047"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-prodigy-nb5-12","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | Prodigy NB5-12","description":"\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-wrap\"\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Prodigy NB5-12 Dual\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge | Two Separate Chambers | Rear-Firing Trunk-Load\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e1.76 ft³ Gross\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e0.67 ft³ Net\/Ch\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eDual Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e29.25\" × 14.5\" × 9.5\/14.75\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eV-Groove \/ Dado\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eThe Prodigy NB5-12 in a Dual-Driver Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eTwo NB5-12s in a single trunk-loading wedge with fully independent sealed chambers. 1200W RMS per driver, +6dB of headroom over single-driver setup. Standing Proline X design rule: dual sealed enclosures always get full-height chamber dividers.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e1.76 cu ft total gross, split into 0.88 cu ft per-chamber gross, 0.67 cu ft per-chamber net after driver displacement. Same per-chamber alignment as the single-driver PO Wedge for NB5-12.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eFull-height, full-depth 3\/4\" MDF divider between the two chambers. Each driver sees its own dedicated air volume and its own terminal cup. Eliminates cross-chamber acoustic coupling between drivers.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003eAll Proline X dual-driver sealed enclosures use this separate-chamber architecture. Each driver produces its own clean sealed alignment, independent of the other.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eBoth NB5-12s mount on the vertical trunk-lid-side face and fire rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches ~20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofers\u003c\/h4\u003e\n\u003cp\u003eBoth drivers on vertical face, firing rearward into trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eTrunk acts as acoustic extension for smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eWedge tucks against seat back; cargo space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the Prodigy NB5-12\u003c\/h2\u003e\n\u003cp\u003ePer-chamber 0.67 cubic feet net gives D4 Qtc 0.71 (essentially Butterworth), D2 Qtc 0.57 (extended musical). Same per-chamber alignment as the single-driver PO Wedge for NB5-12.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers (Per Chamber)\u003c\/h3\u003e\n\u003cp\u003eD2 Qtc: 0.57 · D4 Qtc: 0.71 · Fc: ~47 Hz · F3: 48-58 Hz depending on coil\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4\" MDF panels + 3\/4\" chamber divider.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC-cut V-grooves at every panel intersection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4\" MDF sheets at both driver mounting positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTwo Pre-Wired Terminal Cups\u003c\/h4\u003e\n\u003cp\u003eOne Proline X ABS\/carbon-fiber composite terminal cup per chamber.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eCustomize Your Build\u003c\/h2\u003e\n\u003ch3\u003eCarpet Finish\u003c\/h3\u003e\n\u003cp\u003eCharcoal gray trunk liner standard; plush black +$10.\u003c\/p\u003e\n\u003ch3\u003eAcrylic Insert Color\u003c\/h3\u003e\n\u003cp\u003eBlack, Blue, Red, White, or none (-$40).\u003c\/p\u003e\n\u003ch3\u003eBox-Only or Loaded\u003c\/h3\u003e\n\u003cp\u003eBox-only: bring your own pair of matched NB5-12 drivers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring the NB5-12 Pair to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eTwo independent terminal cups let you wire in series or parallel externally at the amp. Run matched impedance drivers only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eManufactured in Tullahoma, Tennessee. 1-year limited warranty. Call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eProdigy NB5-12 Dual, Two Chambers, Two Cups, One Wedge\u003c\/h2\u003e\n\u003cp\u003e0.67 cubic feet net per chamber, essentially Butterworth on D4, extended musical on D2. Doubled up for +6dB of headroom.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44533145698393,"sku":"PO 12D-S W NB5 BB","price":379.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44589872545881,"sku":"PO 12D-S W NB5 B","price":359.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12D-SWNB5Front.jpg?v=1787513348"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-alpine-r2-w12","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | Alpine R2-W12","description":"\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-wrap\"\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Alpine R2-W12 Dual\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge | Two Separate Chambers | Rear-Firing Trunk-Load\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e1.70 ft³ Gross\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e0.75 ft³ Net\/Ch\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eDual Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e29.5\" × 15\" × 8.57\/14\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eV-Groove \/ Dado\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eThe Alpine R2-W12 in a Dual-Driver Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eTwo R2-W12s in a single trunk-loading wedge with fully independent sealed chambers. 750W RMS per driver, +6dB headroom over single.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e1.70 cu ft total gross, split into 0.85 cu ft per-chamber gross, 0.75 cu ft per-chamber net. Same per-chamber alignment as the single-driver PO Wedge for R2-W12.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eFull-height, full-depth 3\/4\" MDF divider. Each driver sees its own dedicated air volume and terminal cup.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003eAll Proline X dual-driver sealed enclosures use this architecture. Each driver produces its own clean sealed alignment.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eBoth R2-W12s mount on the vertical trunk-lid-side face and fire rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches ~20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofers\u003c\/h4\u003e\n\u003cp\u003eBoth drivers on vertical face, firing rearward.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eTrunk acts as acoustic extension.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eWedge tucks against seat back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the Alpine R2-W12\u003c\/h2\u003e\n\u003cp\u003ePer-chamber 0.75 cubic feet net gives D2 Qtc 0.68 (near-Butterworth), D4 Qtc 0.81 (punchy). Matches Alpine's own recommended sealed volume per driver.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers (Per Chamber)\u003c\/h3\u003e\n\u003cp\u003eD2 Qtc: 0.68 · D4 Qtc: 0.81 · Fc: ~48 Hz · F3: 43-50 Hz\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4\" MDF panels + 3\/4\" chamber divider.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC-cut V-grooves at every panel intersection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4\" MDF sheets at both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTwo Pre-Wired Terminal Cups\u003c\/h4\u003e\n\u003cp\u003eOne per chamber, 12g OFC pre-wired.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eCustomize Your Build\u003c\/h2\u003e\n\u003ch3\u003eCarpet Finish\u003c\/h3\u003e\n\u003cp\u003eCharcoal gray trunk liner standard; plush black +$10.\u003c\/p\u003e\n\u003ch3\u003eAcrylic Insert Color\u003c\/h3\u003e\n\u003cp\u003eBlack, Blue, Red, White, or none (-$40).\u003c\/p\u003e\n\u003ch3\u003eBox-Only or Loaded\u003c\/h3\u003e\n\u003cp\u003eBox-only: bring your own pair of matched R2-W12 drivers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring the R2-W12 Pair to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eTwo independent terminal cups let you wire in series or parallel externally at the amp. Run matched impedance drivers only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eManufactured in Tullahoma, Tennessee. 1-year limited warranty. Call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eAlpine R2-W12 Dual, Alpine's Own Sealed Spec, Doubled\u003c\/h2\u003e\n\u003cp\u003e0.75 cubic feet net per chamber, Alpine's published sealed volume, doubled up for +6dB of headroom.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44536358273113,"sku":"PO 12D-S W R2 BB","price":369.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44589872480345,"sku":"PO 12D-S W R2 B","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12D-SWR2Front.jpg?v=1787513874"},{"product_id":"performance-optimized-down-fire-sealed-dual-12-enclosure-alpine-rs-w-shallow","title":"Performance Optimized Down Fire Sealed Dual 12\" Shallow Sub Enclosure | Alpine RSW12","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 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-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-dual-12-enclosure-morel-ultimo-powerslim-ps124d","title":"Performance Optimized Down Fire Sealed Dual 12\" Enclosure | Morel Ultimo PowerSlim PS124D","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 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of 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\"\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\"\u003e1.070\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\"\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\"\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 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 a Pair of PS124D\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. Both baffles are bored to the PS124D's \u003cstrong\u003e10.6 inch cutout\u003c\/strong\u003e, 268.6mm to Morel's spec, and the internal height of each chamber is set by the driver's \u003cstrong\u003e3.4 inch mounting depth\u003c\/strong\u003e and the volume it needs. This is the deepest reaching cabinet in the Proline X Down Fire line, and it does it twice.\u003c\/p\u003e\n\u003cp\u003eThe reason is the driver's \u003cstrong\u003e24 Hz free-air resonance against a 49.4 liter Vas\u003c\/strong\u003e. In a 3.4 inch mounting depth those are conventional driver numbers rather than shallow driver numbers, and most shallow 12s sit in the low 30s for free-air resonance, which caps how low they go regardless of the box. Here it produces a \u003cstrong\u003epredicted F3 of 34.2 Hz per driver\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eEach PS124D is a dual 4 ohm voice coil subwoofer rated \u003cstrong\u003e700 watts RMS\u003c\/strong\u003e with 2100 watts maximum transient handling, so the pair carries \u003cstrong\u003e1400 watts RMS combined\u003c\/strong\u003e across 904.8 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 12s run a 2 to 3 inch coil, and that surface area difference is what sets the 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\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\u003e0.80 cubic feet net per driver\u003c\/strong\u003e, \u003cstrong\u003e1.60 cubic feet net total\u003c\/strong\u003e, out of 1.78 gross. That per chamber figure is Morel's own sealed recommendation of 22.7 liters, so each driver sees the same alignment it would get on its own: \u003cstrong\u003eQtc 0.966 with a predicted F3 of 34.2 Hz\u003c\/strong\u003e, computed from Morel's published Fs 24 Hz, Qts 0.6 and Vas 49.4 liters. Morel publishes 36 Hz at this volume, agreement inside about 2 Hz.\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. The alignment sits just under unity with a modest lift near the corner frequency, which is the driver's intended character.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBe Realistic About the Size\u003c\/h3\u003e\n\u003cp\u003eAt \u003cstrong\u003e10.75 inches tall\u003c\/strong\u003e this is one of the two tallest cabinets in the Down Fire line. It is a cargo floor, rear wall, or behind the bench build, not an under seat one. The footprint stays the standard \u003cstrong\u003e30 by 15 inches\u003c\/strong\u003e, so it occupies 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\u003cp\u003eIf clearance is the constraint, the single 12 inch PowerSlim cabinet at 6.375 inches and the dual 10 inch at 7.6875 inches are the alternatives.\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. Both drivers fire down into the floor, and all external dimensions are 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\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 10.6 inch openings.\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 0.80 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\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eMorel rates each 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 per driver. Combined that is 1400 watts RMS, which asks for a serious amplifier.\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 PS124D; 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":44540421767257,"sku":"PO 12D-S DF PS","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12D-SDFPSInternal.jpg?v=1787536831"},{"product_id":"performance-optimized-down-fire-sealed-dual-12-enclosure-jl-audio-12tw3-d4","title":"Performance Optimized Down Fire Sealed Dual 12\" Shallow Sub Enclosure | JL Audio 12TW3","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 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of JL Audio 12TW3-D4 subwoofers\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\"\u003e0.943\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc per driver\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e38.0 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\"\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 JL Audio 12TW3-D4'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 12TW3-D4\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. Both baffle positions are bored to the 12TW3-D4's \u003cstrong\u003e11.625 inch cutout\u003c\/strong\u003e, the chamber depth is set by the driver's \u003cstrong\u003e3.50 inch mounting depth\u003c\/strong\u003e, and each chamber lands exactly on the 0.80 cubic feet JL Audio publishes as the sealed optimum for this driver.\u003c\/p\u003e\n\u003cp\u003eEach 12TW3-D4 is a dual 4-ohm subwoofer rated \u003cstrong\u003e400 watts RMS and 800 watts peak\u003c\/strong\u003e, with \u003cstrong\u003e15.2mm of one-way linear excursion\u003c\/strong\u003e. Across the pair that is \u003cstrong\u003e800 watts RMS combined\u003c\/strong\u003e and 1078 cm² of cone area. Mica-injected polypropylene cones, rubber surrounds, aluminum-alloy heat-dissipating dust caps, cast alloy frames, and 2.5 inch aluminum voice coils. JL Audio's patented Thin-Line architecture and Concentric Tube Suspension are what keep those cones traveling straight through that much excursion in frames three and a half inches deep.\u003c\/p\u003e\n\u003cp\u003eThe published parameters are unusual for a shallow driver: \u003cstrong\u003eFs of 26.46 Hz, Qts of 0.531, and 48.73 liters of Vas\u003c\/strong\u003e per driver. A low free-air resonance and a genuinely low Qts in the same short frame are rare, and together they are why each chamber predicts an F3 of 38.0 Hz, the deepest figure anywhere in the Down Fire program, delivered here twice over.\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 cabinet measures \u003cstrong\u003e1.78 cubic feet gross\u003c\/strong\u003e and \u003cstrong\u003e1.60 cubic feet net total\u003c\/strong\u003e, which is \u003cstrong\u003e0.80 cubic feet net per driver\u003c\/strong\u003e. Net is what each driver actually sees, after panel thickness, the chamber divider, perimeter cross-bracing and the driver's own displacement are subtracted, and 0.80 is JL Audio's own published sealed optimum for the 12TW3-D4.\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\u003eAt 0.80 net per chamber each driver lands at \u003cstrong\u003eQtc 0.943\u003c\/strong\u003e, above the 0.707 maximally flat reference, so there is a little lift near the corner rather than a textbook flat curve. Predicted F3 is \u003cstrong\u003e38.0 Hz\u003c\/strong\u003e per driver, anechoic. Firing down into the floor, that 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\u003eTwo Chambers, Not One\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 split by a bonded full-height 3\/4 inch MDF divider, so each driver gets its own dedicated airspace and its own polyfill. Two drivers sharing one sealed volume interact acoustically, with each driver's compression phase becoming the pressure environment the other works against. That smears transient response and blurs the alignment each driver would have on its own. A full divider removes the interaction completely.\u003c\/p\u003e\n\u003cp\u003eBe realistic about the size. At \u003cstrong\u003e10.75 inches tall\u003c\/strong\u003e this is among the tallest cabinets in the Down Fire line, a cargo floor or rear wall build rather than an under-seat one. The 30 by 15 inch footprint is unchanged, so it occupies no more floor area than any other Down Fire cabinet; it simply stands taller because halving the width means each chamber has to gain height to hold its full 0.80 cubic feet. Measure your vertical clearance before ordering. 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\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 carries the panels and polyfill is pre-installed in each chamber. Both drivers land on 8\/32 threaded inserts, and two sets of stainless steel machine screws are included.\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, which matters with two 11.625 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\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 bonded 3\/4 inch MDF divider\u003c\/strong\u003e gives each 12TW3-D4 its own 0.80 cubic feet net and its own polyfill, so neither driver is working against the other's compression stroke.\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\u003eJL Audio rates each 12TW3-D4 at \u003cstrong\u003e400 watts RMS and 800 watts peak\u003c\/strong\u003e, \u003cstrong\u003e800 watts RMS combined\u003c\/strong\u003e across the pair, and recommends 200 to 400 watts of amplifier power per driver. Aim at the top of that range. Sensitivity is 82 dB at 1 watt, which is low, and that is the price of getting 15.2mm of excursion and a 26.46 Hz resonance into a 3.50 inch frame.\u003c\/p\u003e\n\u003cp\u003eOne side-mounted cup feeds both driver positions in parallel. Each driver has dual 4-ohm coils, so final impedance is set at the drivers. Wire both drivers identically, since mismatched wiring between chambers splits power unevenly, and 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 JL Audio 12TW3-D4 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 cutouts, two chambers, one volume target taken straight from JL Audio's own sealed optimum. Machined on ShopSabre CNC 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":44540641411161,"sku":"PO 12D-S DF TW3","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12D-SDFTW3Front.png?v=1787246771"},{"product_id":"performance-optimized-down-fire-sealed-dual-12-enclosure-wavtech-thinpro12","title":"Performance Optimized Down Fire Sealed Dual 12\" Shallow Sub Enclosure | Wavtech thinPRO12","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\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 Wāvtech thinPRO12 subwoofers\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\"\u003e1.20 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\"\u003e1.20\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\"\u003e0.912\u003c\/span\u003e\u003cspan class=\"l\"\u003eQtc per chamber, 2 ohm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e38.3 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff, 2 ohm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e8.4375 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 Wāvtech thinPRO12'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 thinPRO12\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. Both baffle positions are bored to the thinPRO12's \u003cstrong\u003e11.125 inch, 282mm cutout\u003c\/strong\u003e, and the internal height is set by its \u003cstrong\u003e3.0 inch, 76.2mm mounting depth\u003c\/strong\u003e. That shallow frame is what lets a two chamber cabinet holding a pair of 750 watt 12s finish at 8.4375 inches tall on a 30 by 15 inch footprint.\u003c\/p\u003e\n\u003cp\u003eEach driver is offered as the \u003cstrong\u003ethinPRO12-2\u003c\/strong\u003e (2 ohm SVC) or the \u003cstrong\u003ethinPRO12-4\u003c\/strong\u003e (4 ohm SVC), rated \u003cstrong\u003e750 watts RMS and 2250 watts peak\u003c\/strong\u003e with 20mm of one way linear excursion and 54mm of peak to peak mechanical travel. Across the pair that is \u003cstrong\u003e1500 watts RMS combined\u003c\/strong\u003e and 1021.4 cm squared of cone area, roughly 6 dB more maximum output than a single driver in the same alignment.\u003c\/p\u003e\n\u003cp\u003eThe engineering is unusual for a driver that mounts in three inches. 5 inch, 127mm four layer high temp voice coils ride on vented polyimide composite formers. Cones are honeycomb Nomex and glass fiber composite, suspensions pair high excursion double roll NBR surrounds with \u003cstrong\u003edual internal mirrored NBR spiders\u003c\/strong\u003e, and the motors are FEA optimized dual gap structures with double stacked strontium magnets. Free air resonance is \u003cstrong\u003e25 Hz on the -2 and 26 Hz on the -4\u003c\/strong\u003e, which is low for any 12 inch driver and unusual for one this shallow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eTwo Chambers, Not One\u003c\/h3\u003e\n\u003cp\u003eThis enclosure follows the Proline X standing design rule for dual sealed builds. The cabinet is split into \u003cstrong\u003etwo fully separate chambers\u003c\/strong\u003e by a bonded full height 3\/4 inch MDF divider, so each driver gets its own dedicated airspace.\u003c\/p\u003e\n\u003cp\u003eTwo drivers sharing one sealed volume interact acoustically. Each driver's compression phase becomes the other's pressure environment, which smears transient response and blurs the alignment either would have on its own. A full divider eliminates that. Both chambers are damped individually with pre-installed polyfill, and \u003cstrong\u003eone shared side mounted terminal cup\u003c\/strong\u003e feeds both driver positions in parallel with 12 gauge OFC.\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\u003e0.60 cubic feet net per chamber, 1.20 cubic feet net total\u003c\/strong\u003e, from a 1.29 cubic foot gross cavity. That per chamber figure is Wāvtech's own preferred sealed volume for the thinPRO12, matched exactly rather than approximated.\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\u003eBecause the chambers are separate, the alignment is stated per driver, not per box. With the \u003cstrong\u003ethinPRO12-2\u003c\/strong\u003e, Fs 25 Hz and Qts 0.49, each chamber lands at \u003cstrong\u003eQtc 0.912 with F3 at 38.3 Hz\u003c\/strong\u003e. With the \u003cstrong\u003ethinPRO12-4\u003c\/strong\u003e, Fs 26 Hz and Qts 0.46, each chamber lands at \u003cstrong\u003eQtc 0.856 with F3 at 41.4 Hz\u003c\/strong\u003e. Both variants share the same 42 liter Vas and the same 0.042 cubic feet of driver displacement, so the cabinet itself does not change between them.\u003c\/p\u003e\n\u003cp\u003eWorth stating plainly: Wāvtech's published enclosure data is the most accurate we have encountered in this program. They list Qtc 0.91 with F3 at 39 Hz for the -2 and Qtc 0.86 with F3 at 42 Hz for the -4 at this exact volume. Computed independently from their own published parameters, our figures land within a hertz on both variants. That is why we build their preferred volume exactly rather than adjusting it. If you want to check the math against another airspace, the \u003ca class=\"df-link\" href=\"\/pages\/sealed-box-calculator\"\u003esealed box calculator\u003c\/a\u003e uses the same published parameters.\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. The cabinet is perimeter cross-braced and finishes at 40 pounds. 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. 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 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 \u003cstrong\u003e3\/4 inch MDF full bonded divider\u003c\/strong\u003e splits the cabinet into two independent sealed volumes, 0.60 cubic feet net each. Neither driver sees the other's pressure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Firing Into the Floor\u003c\/h3\u003e\n\u003cp\u003eBoth drivers fire downward into the floor and the cabinet is floor coupled. The sealed rolloff meets rising cabin gain below 60 Hz, so in car response extends well below the anechoic figure. All external dimensions are stated \u003cstrong\u003emeasured in the down fire position\u003c\/strong\u003e: 30 inches wide, 15 inches deep, 8.4375 inches tall.\u003c\/p\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\u003eEach thinPRO12 is rated \u003cstrong\u003e750 watts RMS and 2250 watts peak\u003c\/strong\u003e, \u003cstrong\u003e1500 watts RMS combined\u003c\/strong\u003e across the pair. Wāvtech's own recommended power range is \u003cstrong\u003e250 to 750 watts RMS per driver\u003c\/strong\u003e. Sensitivity is 83 dB on the -2 and 84 dB on the -4, which is the tradeoff for 20mm of excursion in a 3 inch frame, so give them the upper half of that range.\u003c\/p\u003e\n\u003cp\u003eBoth variants are single voice coil, so there is no coil configuration decision at the driver. A pair of thinPRO12-2 drivers presents 1 ohm at the shared cup and a pair of thinPRO12-4 presents 2 ohms. Use two of the same model and confirm the resulting load against your amplifier's minimum stable impedance.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own pair of thinPRO12-2 or thinPRO12-4 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, two thinPRO12s, each one sitting at the exact volume Wāvtech asked for. Cut on ShopSabre CNC routers from Langboard Elite MDF 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":44540853977177,"sku":"PO 12D-S DF thinPRO","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12D-SDFthinPROInternal.jpg?v=1787537804"},{"product_id":"performance-optimized-down-fire-sealed-dual-12-enclosure-resonix-gus-12","title":"Performance Optimized Down Fire Sealed Dual 12\" Shallow Sub Enclosure | ResoNix GUS-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 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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 ResoNix GUS-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\"\u003e1.50 cu ft Net\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eStandoffs Included\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\"\u003e1.50\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\"\u003e0.716\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\"\u003e36.7-36.7 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\"\u003e9.875 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height, excludes standoffs\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 ResoNix GUS-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 ResoNix GUS-12\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. Both baffle positions are bored to the GUS-12's \u003cstrong\u003e283.57mm cutout\u003c\/strong\u003e, 11.164 inches, the internal height is set by its \u003cstrong\u003e4.539 inch mounting depth\u003c\/strong\u003e, and each chamber lands exactly on the \u003cstrong\u003e0.75 cubic feet\u003c\/strong\u003e ResoNix publishes for a 0.707 Qtc alignment.\u003c\/p\u003e\n\u003cp\u003eThe parameter that makes this driver worth building around is a \u003cstrong\u003efree-air resonance of 14.5 Hz\u003c\/strong\u003e paired with a \u003cstrong\u003eQts of 0.28\u003c\/strong\u003e. A sealed enclosure always raises the system corner above the driver's own Fs, so a low starting point is what makes deep extension possible in a small box. Most shallow 12s sit in the high 20s or low 30s. This one reaches \u003cstrong\u003e36.7 Hz per driver\u003c\/strong\u003e, twice over, from a pair that each mount in four and a half inches.\u003c\/p\u003e\n\u003cp\u003eThe motor is a patent pending FEA optimized overhung design with high motor force and very low inductance. Copper and aluminum shorting rings plus a \u003cstrong\u003efull length copper shorting sleeve\u003c\/strong\u003e positioned outside the gap keep inductance stable across stroke while pulling heat out of the coil. The cone is a Nomex honeycomb core with carbon fiber facing, driven by a \u003cstrong\u003e3 inch copper voice coil on a titanium former\u003c\/strong\u003e. Cone area is 490.87 cm² per driver, 981.7 cm² across the pair.\u003c\/p\u003e\n\u003cp\u003eThe excursion figures are published the way they should be. ResoNix quotes \u003cstrong\u003e20.69mm of Klippel verified one way excursion at 70% BL\u003c\/strong\u003e, a measured number under a stated criterion, and lists Xmech separately at 24mm. That is a manufacturer telling you where the driver stays linear and where it physically stops, rather than blending the two into one marketing figure.\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 driver gets \u003cstrong\u003e0.75 cubic feet net\u003c\/strong\u003e, \u003cstrong\u003e1.50 cubic feet net across both chambers\u003c\/strong\u003e, out of 1.59 gross. That is ResoNix's own published figure for a 0.707 Qtc alignment, hit on the nose rather than approached. The volume quoted is true net internal airspace after panel thickness, the divider, bracing and each driver's own 0.046 cubic feet of 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\u003eBoth coil options work here, which is not always the case. The Dual 4-Ohm lands at Qtc 0.716 with F3 at 36.7 Hz per chamber. The Dual 2-Ohm lands at Qtc 0.668 with F3 at 36.8 Hz, a tenth of a hertz apart, because the two variants share a 0.28 Qts and differ only slightly in Fs, 14.54 Hz against 14.51 Hz, and in Vas, 119.35 litres against 101.07. The D2 is the more damped of the two. Pick whichever suits your amplifier rather than the alignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eTwo Drivers, Two Chambers\u003c\/h3\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 \u003cstrong\u003efull height bonded 3\/4 inch MDF divider\u003c\/strong\u003e eliminates that completely. Each GUS-12 gets its own 0.75 cubic feet and its own polyfill. Separate chambers are the standing design rule on every Proline X dual sealed enclosure.\u003c\/p\u003e\n\u003cp\u003eOne side mounted terminal cup serves both chambers, pre-wired in 12 gauge OFC to both driver positions in parallel, so you do not run the chambers separately to the amplifier. Final impedance is set at the drivers. Each GUS-12 is dual voice coil: the D2 gives 1 ohm in parallel or 4 in series, the D4 gives 2 ohms in parallel or 8 in series, and the two drivers in parallel through the cup halve that again. A pair of D4 drivers wired parallel presents a 1 ohm load. Wire both drivers identically and confirm the result against your amplifier's minimum stable impedance before powering the system.\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. That matters with two 11.164 inch cutouts and 1600 watts in the same cabinet. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cp\u003eBe realistic about size. The cabinet measures \u003cstrong\u003e30 inches wide by 15 inches deep by 9.875 inches tall, measured in the down fire position and excluding standoffs\u003c\/strong\u003e, and the standoffs that hold ResoNix's required 60mm add roughly two and a half inches on top of that. Plan on an installed height above 11 inches. This is a cargo floor or rear wall 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.\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 per chamber.\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 \u003cstrong\u003efull height 3\/4 inch MDF panel\u003c\/strong\u003e is bonded in as a divider, so each GUS-12 works against its own 0.75 cubic feet with its own pre-installed polyfill.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eStandoffs Included\u003c\/h4\u003e\n\u003cp\u003eResoNix specifies \u003cstrong\u003e60mm minimum\u003c\/strong\u003e from the baffle surface to whatever sits in front of the cone, 28mm between the surround and the obstruction. On a down fire cabinet that is the floor, so custom-fit standoffs ship with every enclosure.\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, Endorsed by the Manufacturer\u003c\/h3\u003e\n\u003cp\u003eResoNix addresses the orientation question directly in their own documentation: there is very little real world difference in sound between down firing and up firing, and you should choose whichever makes the installation easier, more reliable and easier to service.\u003c\/p\u003e\n\u003cp\u003eThe GUS series also uses a \u003cstrong\u003evented rear cone assembly\u003c\/strong\u003e attached to the voice coil former, so the pole vent can be completely obstructed with no negative effect. That is what allows these chambers to be built without the rear motor clearance allowance most drivers require.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Warranty\u003c\/h3\u003e\n\u003cp\u003eResoNix rates the GUS-12 at \u003cstrong\u003e800 watts RMS\u003c\/strong\u003e each, \u003cstrong\u003e1600 watts RMS across the pair\u003c\/strong\u003e, and states plainly that they do not underrate their drivers the way many manufacturers do. Burnt voice coils and damage from bottoming out are not covered under their warranty. At 1600 watts the electrical system matters as much as the amplifier, so plan on adequate alternator output, battery capacity, and correctly sized power and ground cable. ResoNix also notes these drivers stay linear and composed right up to their limits, so it will not always be obvious when you are pushing too hard.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty and ships with the standoffs. Bring your own pair of GUS-12 in either coil configuration; the drivers are purchased directly from ResoNix Sound Solutions.\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 deepest reaching cabinet in the Down Fire line, two chambers at 0.75 cubic feet each, custom-fit standoffs and a 1 year limited warranty, 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":44540873080921,"sku":"PO 12D-S DF GUS","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_DF_GUS_Front.jpg?v=1790366335"},{"product_id":"proline-x-performance-optimized-wedge-enclosure-fits-dual-kicker-solo-x-12-subwoofers","title":"Proline X Performance Optimized Wedge Enclosure | Fits Dual Kicker Solo X 12\" Subwoofers","description":"\u003cstyle\u003e\n  .po-wrap { font-family: 'Helvetica Neue', Arial, sans-serif; line-height: 1.8; color: #1e293b; max-width: 1200px; margin: 0 auto; background: #ffffff; }\n  .po-hero { background: linear-gradient(135deg, #0f172a 0%, #8b5a2b 100%); padding: 60px 40px; text-align: center; color: white; }\n  .po-hero .po-title { font-size: 2.6em; font-weight: 800; text-transform: uppercase; letter-spacing: 2px; margin: 0 0 10px 0; color: white; }\n  .po-hero .po-subtitle { font-size: 1.2em; font-weight: 300; opacity: 0.9; margin: 0 0 30px 0; }\n  .po-badges { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 20px; }\n  .po-badge { background: rgba(184, 115, 51, 0.2); border: 1px solid #b87333; color: #d99058; padding: 8px 20px; border-radius: 20px; font-size: 0.9em; font-weight: 600; letter-spacing: 0.5px; }\n  .po-section { padding: 50px 40px; border-bottom: 1px solid #e2e8f0; background: #ffffff; }\n  .po-section:nth-child(even) { background: #fef3e7; }\n  .po-section h2 { color: #8b5a2b; font-size: 2em; font-weight: 700; margin: 0 0 20px 0; padding-bottom: 12px; border-bottom: 3px solid #b87333; }\n  .po-section h3 { color: #0f172a; font-size: 1.4em; font-weight: 600; margin: 30px 0 15px 0; }\n  .po-section p { font-size: 1.05em; color: #334155; margin-bottom: 18px; }\n  .po-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin: 30px 0; }\n  .po-card { background: #ffffff; border: 1px solid #e2e8f0; border-top: 4px solid #b87333; padding: 25px; border-radius: 4px; }\n  .po-card h4 { color: #8b5a2b; font-size: 1.15em; font-weight: 700; margin: 0 0 12px 0; text-transform: uppercase; letter-spacing: 1px; }\n  .po-card p { font-size: 0.98em; color: #475569; margin: 0; }\n  .po-highlight { background: #fef3e7; border-left: 4px solid #b87333; padding: 25px 30px; margin: 30px 0; border-radius: 4px; }\n  .po-highlight p { color: #1e293b; margin: 0; font-size: 1.05em; }\n  .po-cta { background: linear-gradient(135deg, #0f172a 0%, #8b5a2b 100%); padding: 60px 40px; text-align: center; color: white; }\n  .po-cta h2 { font-size: 2.2em; font-weight: 700; margin: 0 0 20px 0; color: white; border: none; padding: 0; }\n  .po-cta p { font-size: 1.15em; opacity: 0.92; max-width: 800px; margin: 0 auto 20px auto; color: white; }\n  @media (max-width: 768px) { .po-hero { padding: 40px 20px; } .po-hero .po-title { font-size: 1.8em; } .po-section { padding: 30px 20px; } .po-section h2 { font-size: 1.6em; } .po-grid { grid-template-columns: 1fr; } .po-cta { padding: 40px 20px; } .po-cta h2 { font-size: 1.6em; } }\n\u003c\/style\u003e\n\u003cdiv class=\"po-wrap\"\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Dual Kicker Solo X 12\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Behind-Seat Wedge Design for Two Kicker Solo X L7X 12s\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e2.66 ft³ Gross\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e1.13 ft³ Net \/ Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eTightly Damped\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e31.75\" × 15.25\" × 11.75\/17.25\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eV-Groove \/ Dado\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Kicker Solo X 12s in a Purpose-Built Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eA matched pair of Solo X L7X 12s is a statement system: two triple-stacked ferrite motors and two 3-inch coils of thermal capacity behind the seat. Each chamber was computed directly from Kicker's factory Thiele\/Small parameters, not adapted from a generic dual 12\" box.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003eA 3\/4\" divider splits the box into two identical sealed chambers, 1.13 cu ft net each after driver displacement. That puts each dual 1-ohm Solo X 12 at a tightly damped Qtc of 0.61 and dual 2-ohm drivers at 0.64: firmly in the control-first zone below Butterworth, with no peaking anywhere in the passband.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBehind-Seat Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThis is a front-firing wedge built for behind-seat and rear-wall installs. The rear panel is vertical and sits flat against the cab wall; both woofers mount on the baffle, raked back 20 degrees to follow the seat lean.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eVertical Rear Panel\u003c\/h4\u003e\n\u003cp\u003eSits flush against the cab back wall or trunk bulkhead, so the full footprint of the box goes to airspace instead of wasted gaps.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003e20° Raked Baffle\u003c\/h4\u003e\n\u003cp\u003eMatches the lean of most factory seat backs and fires both Solo X drivers forward into the cabin instead of into the seat.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eChambered and Braced\u003c\/h4\u003e\n\u003cp\u003eThe 3\/4\" dado-locked center divider isolates each driver in its own sealed chamber and doubles as a full-height brace, killing panel resonance across the 31.75-inch span.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eCarpet-Wrap Ledge\u003c\/h4\u003e\n\u003cp\u003eA recessed perimeter ledge terminates the carpet cleanly at the baffle edge for a finished, factory look.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the Kicker Solo X 12\u003c\/h2\u003e\n\u003cp\u003eEach chamber is built to 1.13 cubic feet net. Dual 1-ohm 49L7X121 drivers run a Qtc of 0.61 and dual 2-ohm 49L7X122 drivers run 0.64: alignments on the damped side of Butterworth, where the box and suspension keep the massive SoloX motors on a short leash. The payoff is bass with zero bloom, kick drums that hit and stop, and a gradual roll-off that in-vehicle cabin gain fills back in below the knee. Because the chambers are identical, both drivers stay perfectly matched.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers (Per Driver)\u003c\/h3\u003e\n\u003cp\u003eDual 1-Ohm: Qtc 0.61 · Fc 50 Hz · F3 59.8 Hz — Dual 2-Ohm: Qtc 0.64 · Fc 52 Hz · F3 58.8 Hz\u003c\/p\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eEach baffle opening is CNC-cut to 11-1\/16\" (Kicker spec). Mounting depth required is 10-1\/8\", cleared with margin at every point of the stroke, including breathing room for the vented motor. 8\/32 threaded inserts pressed into the baffle backside.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eSealed Alignment Response\u003c\/h2\u003e\n\u003cp\u003ePredicted anechoic response of each Solo X 12 in its own 1.13 cu ft sealed chamber, computed from Kicker factory T\/S parameters. This enclosure ships without drivers, so both coil variants are plotted; they do not load the same chamber identically.\u003c\/p\u003e\n\u003csvg viewbox=\"0 0 700 330\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" role=\"img\" aria-label=\"Sealed frequency response of the Kicker Solo X 12 in each chamber of this enclosure, both coil variants, with the minus 3 dB reference line\" style=\"width:100%;height:auto;background:#ffffff;border:1px solid #e2e8f0;border-radius:4px;\"\u003e\n\u003crect x=\"70\" y=\"20\" width=\"610\" height=\"240\" fill=\"#ffffff\"\u003e\u003c\/rect\u003e\n\u003cg stroke=\"#e2e8f0\" stroke-width=\"1\"\u003e\n\u003cline x1=\"70\" y1=\"20\" x2=\"70\" y2=\"260\"\u003e\u003c\/line\u003e\u003cline x1=\"177.4\" y1=\"20\" x2=\"177.4\" y2=\"260\"\u003e\u003c\/line\u003e\u003cline x1=\"312.7\" y1=\"20\" x2=\"312.7\" y2=\"260\"\u003e\u003c\/line\u003e\u003cline x1=\"401.9\" y1=\"20\" x2=\"401.9\" y2=\"260\"\u003e\u003c\/line\u003e\u003cline x1=\"496.4\" y1=\"20\" x2=\"496.4\" y2=\"260\"\u003e\u003c\/line\u003e\u003cline x1=\"603.8\" y1=\"20\" x2=\"603.8\" y2=\"260\"\u003e\u003c\/line\u003e\u003cline x1=\"680\" y1=\"20\" x2=\"680\" y2=\"260\"\u003e\u003c\/line\u003e\n\u003cline x1=\"70\" y1=\"20\" x2=\"680\" y2=\"20\"\u003e\u003c\/line\u003e\u003cline x1=\"70\" y1=\"68\" x2=\"680\" y2=\"68\"\u003e\u003c\/line\u003e\u003cline x1=\"70\" y1=\"116\" x2=\"680\" y2=\"116\"\u003e\u003c\/line\u003e\u003cline x1=\"70\" y1=\"164\" x2=\"680\" y2=\"164\"\u003e\u003c\/line\u003e\u003cline x1=\"70\" y1=\"212\" x2=\"680\" y2=\"212\"\u003e\u003c\/line\u003e\u003cline x1=\"70\" y1=\"260\" x2=\"680\" y2=\"260\"\u003e\u003c\/line\u003e\n\u003c\/g\u003e\n\u003cline x1=\"70\" y1=\"92\" x2=\"680\" y2=\"92\" stroke=\"#94a3b8\" stroke-width=\"1.5\" stroke-dasharray=\"6,5\"\u003e\u003c\/line\u003e\n\u003ctext x=\"675\" y=\"87\" text-anchor=\"end\" font-family=\"Helvetica Neue, Arial, sans-serif\" font-size=\"11\" fill=\"#64748b\"\u003e−3 dB\u003c\/text\u003e\n\u003cpath d=\"M70,204.4 L82,198.2 L95,192.1 L107,186.0 L120,180.0 L132,174.0 L145,168.2 L157,162.4 L170,156.7 L182,151.1 L194,145.7 L207,140.4 L219,135.2 L232,130.2 L244,125.4 L257,120.8 L269,116.3 L282,112.1 L294,108.2 L307,104.4 L319,100.9 L331,97.7 L344,94.7 L356,91.9 L369,89.4 L381,87.1 L394,85.1 L406,83.2 L419,81.5 L431,80.0 L443,78.7 L456,77.5 L468,76.4 L481,75.5 L493,74.7 L506,73.9 L518,73.3 L531,72.7 L543,72.2 L556,71.8 L568,71.4 L580,71.0 L593,70.7 L605,70.4 L618,70.2 L630,69.9 L643,69.7 L655,69.6 L668,69.4 L680,69.3\" fill=\"none\" stroke=\"#0f172a\" stroke-width=\"2.5\"\u003e\u003c\/path\u003e\n\u003cpath d=\"M70,200.8 L82,194.8 L95,188.8 L107,182.9 L120,177.0 L132,171.2 L145,165.5 L157,160.0 L170,154.5 L182,149.1 L194,143.9 L207,138.8 L219,133.9 L232,129.1 L244,124.5 L257,120.1 L269,115.9 L282,112.0 L294,108.2 L307,104.7 L319,101.4 L331,98.3 L344,95.5 L356,92.8 L369,90.4 L381,88.2 L394,86.2 L406,84.4 L419,82.7 L431,81.2 L443,79.9 L456,78.7 L468,77.6 L481,76.6 L493,75.7 L506,74.9 L518,74.2 L531,73.6 L543,73.0 L556,72.5 L568,72.1 L580,71.7 L593,71.3 L605,71.0 L618,70.7 L630,70.4 L643,70.2 L655,70.0 L668,69.8 L680,69.6\" fill=\"none\" stroke=\"#b87333\" stroke-width=\"3\"\u003e\u003c\/path\u003e\n\u003cg font-family=\"Helvetica Neue, Arial, sans-serif\" font-size=\"11\" fill=\"#64748b\"\u003e\n\u003ctext x=\"70\" y=\"276\" text-anchor=\"middle\"\u003e20\u003c\/text\u003e\u003ctext x=\"177.4\" y=\"276\" text-anchor=\"middle\"\u003e30\u003c\/text\u003e\u003ctext x=\"312.7\" y=\"276\" text-anchor=\"middle\"\u003e50\u003c\/text\u003e\u003ctext x=\"401.9\" y=\"276\" text-anchor=\"middle\"\u003e70\u003c\/text\u003e\u003ctext x=\"496.4\" y=\"276\" text-anchor=\"middle\"\u003e100\u003c\/text\u003e\u003ctext x=\"603.8\" y=\"276\" text-anchor=\"middle\"\u003e150\u003c\/text\u003e\u003ctext x=\"680\" y=\"276\" text-anchor=\"middle\"\u003e200\u003c\/text\u003e\n\u003ctext x=\"62\" y=\"24\" text-anchor=\"end\"\u003e+6\u003c\/text\u003e\u003ctext x=\"62\" y=\"72\" text-anchor=\"end\"\u003e0\u003c\/text\u003e\u003ctext x=\"62\" y=\"120\" text-anchor=\"end\"\u003e−6\u003c\/text\u003e\u003ctext x=\"62\" y=\"168\" text-anchor=\"end\"\u003e−12\u003c\/text\u003e\u003ctext x=\"62\" y=\"216\" text-anchor=\"end\"\u003e−18\u003c\/text\u003e\u003ctext x=\"62\" y=\"264\" text-anchor=\"end\"\u003e−24\u003c\/text\u003e\n\u003ctext x=\"375\" y=\"296\" text-anchor=\"middle\" letter-spacing=\"1\"\u003eFREQUENCY · Hz\u003c\/text\u003e\n\u003ctext x=\"20\" y=\"140\" text-anchor=\"middle\" transform=\"rotate(-90 20 140)\" letter-spacing=\"1\"\u003eLEVEL · dB\u003c\/text\u003e\n\u003c\/g\u003e\n\u003cg font-family=\"Helvetica Neue, Arial, sans-serif\" font-size=\"12\"\u003e\n\u003crect x=\"80\" y=\"308\" width=\"18\" height=\"4\" fill=\"#b87333\"\u003e\u003c\/rect\u003e\u003ctext x=\"104\" y=\"313\" fill=\"#334155\"\u003eD1 · Qtc 0.61, Fc 50 Hz, F3 59.8 Hz\u003c\/text\u003e\n\u003crect x=\"330\" y=\"308\" width=\"18\" height=\"4\" fill=\"#0f172a\"\u003e\u003c\/rect\u003e\u003ctext x=\"354\" y=\"313\" fill=\"#334155\"\u003eD2 · Qtc 0.64, Fc 52 Hz, F3 58.8 Hz\u003c\/text\u003e\n\u003c\/g\u003e\n\u003c\/svg\u003e\n\u003cp\u003eThe dashed line marks the half-power point. Roll-off below F3 is the gentle 12 dB\/octave slope characteristic of sealed alignments, which cabin gain in a real vehicle substantially fills in. Run the numbers yourself with our \u003ca href=\"\/pages\/sealed-box-calculator\"\u003esealed box calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4\" MDF panels milled to documented spec.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC-cut V-grooves at every panel intersection. Dado joints lock the raked baffle, vertical rear panel, and center divider into the side walls.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4\" MDF sheets plus a trim layer at the driver mounting face. Two Solo X 12s put serious mechanical load into the baffle at 4000 combined watts; it does not flex.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS\/carbon-fiber composite terminal cup, side-mounted, with 12 gauge OFC pre-wired.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eFinish and Trim\u003c\/h2\u003e\n\u003ch3\u003ePlush Black Carpet\u003c\/h3\u003e\n\u003cp\u003eEvery enclosure ships wrapped in plush black automotive carpet, the standard finish for the PO Wedge line.\u003c\/p\u003e\n\u003ch3\u003eBlack Acrylic Insert\u003c\/h3\u003e\n\u003cp\u003eThe signature Proline X acrylic insert comes in black.\u003c\/p\u003e\n\u003ch3\u003eBox-Only\u003c\/h3\u003e\n\u003cp\u003eThis listing is box-only. Bring your own pair of Solo X 12s.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring Two Kicker Solo X 12s to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eKicker recommends 1000-2000 watts RMS per Solo X 12, so plan 2000-4000 watts RMS of clean system power across the pair at your wired impedance. Match both drivers to the same coil configuration so the pair loads and wires symmetrically; the tight damping keeps cone travel controlled through the passband.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eManufactured in Tullahoma, Tennessee on our ShopSabre CNC equipment. 1-year limited warranty. Call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eDual Kicker Solo X 12s: Tight, Controlled Power, Twice Over\u003c\/h2\u003e\n\u003cp\u003eTwo identical 1.13 cubic foot sealed chambers, solved from factory T\/S for a tightly damped alignment. Double the cone area, zero bloom, in a wedge that disappears behind the seat.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44575791939673,"sku":"PO 12D-S W Solo X","price":549.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-enclosure-x-series-fits-kicker-solo-x-8-subwoofer-dualsubwoofer-enclosuresproline-x-1023143.jpg?v=1774078266"},{"product_id":"jl-audio-12w3v3-dual-subwoofer-box","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | JL Audio 12W3v3","description":"\u003cdiv class=\"pow-wrap\"\u003e\n\u003cstyle\u003e\n.pow-wrap{font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Helvetica,Arial,sans-serif;line-height:1.7;color:#cbd5e1 !important;}\n.pow-wrap p{color:#cbd5e1 !important;margin:0 0 14px 0;}\n.pow-wrap strong{color:#d99058 !important;}\n.pow-wrap a{color:#c68a4a 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0;}\n.pow-warn-label{display:inline-block;background:#f59e0b !important;color:#2b1a0b !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.pow-warn h3{color:#fbbf24 !important;margin:0 0 10px 0;}\n.pow-warn p{color:#fde68a !important;margin:0 0 10px 0;}\n.pow-warn p:last-child{margin-bottom:0;}\n.pow-warn strong{color:#fbbf24 !important;}\n.pow-card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:24px 0;}\n@media(max-width:600px){.pow-card-grid{grid-template-columns:1fr;}}\n.pow-card{background:#1a2740 !important;border:1px solid #4a3520 !important;border-top:3px solid #b87333 !important;border-radius:6px;padding:22px;}\n.pow-card-label{display:inline-block;background:#b87333 !important;color:#2a1608 !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.pow-card h4{margin:0 0 10px 0;}\n.pow-card-divider{height:2px;background:#b87333 !important;width:32px;margin-bottom:12px;border-radius:2px;}\n.pow-card p{font-size:0.93em;color:#b6c4d6 !important;margin:0;line-height:1.65;}\n.pow-card p strong{color:#d99058 !important;}\n.pow-table{width:100% !important;border-collapse:collapse;margin:22px 0;font-size:0.94em;}\n.pow-table th{background:#8b5a2b !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 #3a2818 !important;}\n.pow-table td{padding:10px 14px;border-bottom:1px solid #3a2818 !important;color:#dbe4ef !important;background:#111c30 !important;}\n.pow-table tr:nth-child(even) td{background:#1a2740 !important;}\n.pow-table td:first-child{font-weight:600;color:#d99058 !important;width:30%;}\n.pow-chartbox{display:block !important;width:100% !important;max-width:100% !important;margin:22px 0 !important;}\n.pow-chart{display:block !important;width:100% !important;max-width:100% !important;height:auto !important;}\n.pow-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%) !important;border-radius:8px;padding:28px 26px;margin:32px 0 0 0;text-align:center;}\n.pow-cta h3{color:#ffffff !important;margin:0 0 10px 0;}\n.pow-cta p{color:#e2e8f0 !important;margin:0;font-size:0.97em;}\n\u003c\/style\u003e\n\n\u003cdiv class=\"pow-hero\"\u003e\n\u003cspan class=\"pow-eyebrow\"\u003eProline X | Performance Optimized Wedge\u003c\/span\u003e\u003ch2\u003eTwo 12W3v3s, Each in Its Own 1.250 Cubic Feet.\u003c\/h2\u003e\n\u003cp\u003eA dual chamber sealed wedge cut for the JL Audio 12W3v3 and nothing else. It sits in the trunk with the tall face against the back of the rear seat and the drivers firing rearward, using the length of the trunk instead of standing in the middle of it.\u003c\/p\u003e\n\u003cdiv class=\"pow-badges\"\u003e\n\u003cspan class=\"pow-badge\"\u003e1.250 CU FT NET PER DRIVER\u003c\/span\u003e\u003cspan class=\"pow-badge\"\u003eDUAL CHAMBER\u003c\/span\u003e\u003cspan class=\"pow-badge\"\u003eQTC 0.80 TO 0.90\u003c\/span\u003e\u003cspan class=\"pow-badge\"\u003eTRUNK MOUNT, REAR FIRING\u003c\/span\u003e\u003cspan class=\"pow-badge\"\u003e1000W RMS COMBINED\u003c\/span\u003e\u003cspan class=\"pow-badge\"\u003eBUILT IN TULLAHOMA, TN\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-warn\"\u003e\n\u003cspan class=\"pow-warn-label\"\u003eRead This First\u003c\/span\u003e\u003ch3\u003eThis Is Not a Down Fire Enclosure\u003c\/h3\u003e\n\u003cp\u003eThe wedge works in one orientation: tall face flat against the rear seat back, taper running out toward the trunk lid, drivers firing rearward. There are no feet, no baffle clearance gap, and \u003cstrong\u003eno down fire option on this cabinet\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIt is cut direct fit to the 12W3v3 at a 281mm opening. \u003cstrong\u003eA standard 12 will not fit\u003c\/strong\u003e, and would not see the correct airspace if it did.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-section\"\u003e\n\u003ch3\u003eBuilt Backward From One Published Number\u003c\/h3\u003e\n\u003cp\u003eJL publishes 1.25 cubic feet of sealed airspace for the 12W3v3-2 and 1.125 for the -4. This cabinet is built at 1.25, so the 2 ohm coil sits on its published number and the 4 ohm coil lands slightly better damped than its own. Each chamber here is built at \u003cstrong\u003e1.321 cubic feet gross\u003c\/strong\u003e. Subtract the driver's 0.071 cubic feet of displacement and each 12W3v3 sees \u003cstrong\u003e1.250 cubic feet net\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eTotal gross volume across both chambers is 2.642 cubic feet, 2.50 net acoustic.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-section-alt\"\u003e\n\u003ch3\u003eWhy a Wedge\u003c\/h3\u003e\n\u003cdiv class=\"pow-card-grid\"\u003e\n\u003cdiv class=\"pow-card\"\u003e\n\u003cspan class=\"pow-card-label\"\u003ePackaging\u003c\/span\u003e\u003cdiv class=\"pow-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eIt Uses the Trunk Lengthwise\u003c\/h4\u003e\n\u003cp\u003eTall face against the rear seat, tapering down as it runs out toward the lid. The cabinet claims the deep space at the base of the trunk and gives height back where the lid closes, so \u003cstrong\u003eyou keep usable trunk\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-card\"\u003e\n\u003cspan class=\"pow-card-label\"\u003eLoading\u003c\/span\u003e\u003cdiv class=\"pow-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eThe Trunk Is Part of the System\u003c\/h4\u003e\n\u003cp\u003eFiring rearward means output loads into the trunk volume and reaches the cabin through the rear seat and deck. That path is what gives a trunk mounted subwoofer its weight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-card\"\u003e\n\u003cspan class=\"pow-card-label\"\u003eLocalization\u003c\/span\u003e\u003cdiv class=\"pow-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eHarder to Point At\u003c\/h4\u003e\n\u003cp\u003eBecause the drivers do not radiate straight into the cabin, the low end arrives through the structure rather than as a beam from behind your head, which makes \u003cstrong\u003ekeeping the stage forward\u003c\/strong\u003e easier.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-card\"\u003e\n\u003cspan class=\"pow-card-label\"\u003eSeparation\u003c\/span\u003e\u003cdiv class=\"pow-card-divider\"\u003e\u003c\/div\u003e\n\u003ch4\u003eTwo Sealed Chambers\u003c\/h4\u003e\n\u003cp\u003eA full divider gives each 12W3v3 its own airspace. \u003cstrong\u003eNeither cone loads against the other\u003c\/strong\u003e, so the pair stays predictable when both are working hard.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-section\"\u003e\n\u003ch3\u003eDual Chamber, Not Common Chamber\u003c\/h3\u003e\n\u003cp\u003eEach 12W3v3 loads into its own sealed 1.321 cubic foot chamber, isolated by a full divider. With separate chambers, one driver's cone motion does not modulate the air load the other driver sees, so the two stay acoustically independent under hard excursion.\u003c\/p\u003e\n\u003cp\u003eThe 12W3v3 is rated at \u003cstrong\u003e500 watts RMS each\u003c\/strong\u003e, so this cabinet is built around a 1000 watt pair. A single Proline X terminal cup is side mounted and pre wired with 12 gauge OFC. This is a raw enclosure, so how you wire the drivers from that cup is your call. Both W3v3 coils are single voice coil, so a matched pair gives you series or parallel and nothing in between.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-section-alt\"\u003e\n\u003ch3\u003eHow It Is Built\u003c\/h3\u003e\n\u003cdiv class=\"pow-highlight\"\u003e\n\u003ch3\u003eCabinet\u003c\/h3\u003e\n\u003cp\u003eCut on our ShopSabre CNC from Langboard Elite MDF and assembled with \u003cstrong\u003edado and V groove joinery\u003c\/strong\u003e over 0.75 inch panels, with a \u003cstrong\u003edouble baffle at 1.5 inches\u003c\/strong\u003e and a full chamber divider. Angled panel meets are cut as V joints so the faces close on a machined bevel rather than a filled seam.\u003c\/p\u003e\n\u003ch3\u003eMounting Pattern\u003c\/h3\u003e\n\u003cp\u003eThe 281mm cutout and the mounting locations are machined in the same operation from the same origin, so the holes cannot drift relative to each other. \u003cstrong\u003eThreaded inserts go into every one of those mounting locations\u003c\/strong\u003e, with stainless machine screws supplied, so each driver bolts down to metal instead of biting into MDF. That is what lets you pull a driver and put it back as many times as the install takes without chewing out the baffle.\u003c\/p\u003e\n\u003ch3\u003eWiring and Damping\u003c\/h3\u003e\n\u003cp\u003eOne Proline X ABS and carbon fiber composite terminal cup, side mounted, pre wired with 12 gauge OFC to both driver positions. Polyfill is installed as a light wall lining to control internal reflections without altering the acoustic volume, because adding fill density would shift the alignment off the 1.250 target.\u003c\/p\u003e\n\u003ch3\u003eFinish\u003c\/h3\u003e\n\u003cp\u003ePlush black carpet with a black acrylic badge on the woofer face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-section\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eExternal dimensions are \u003cstrong\u003e32.00 inches wide by 16 inches tall\u003c\/strong\u003e, with depth running \u003cstrong\u003e16.86 inches at the base tapering to 11.04 inches at the top\u003c\/strong\u003e. Maximum driver mounting depth is 9.79 inches against the 12W3v3 requirement of 6.654.\u003c\/p\u003e\n\u003cdiv class=\"pow-alert\"\u003e\u003cp\u003e\u003cstrong\u003eFront clearance.\u003c\/strong\u003e These drivers fire rearward into the trunk, so anything you load behind the box has to stay clear of the cones. At 13mm of one way excursion, allow at least an inch and verify both positions independently.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pow-section\"\u003e\n\u003ch3\u003eEnclosure Performance\u003c\/h3\u003e\n\u003cp\u003eCalculated from the published parameters for both W3v3 coils. The cabinet is one box; the two coils are different motors and land on different alignments in it, so both are given rather than averaged.\u003c\/p\u003e\n\u003ctable class=\"pow-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eCoil\u003c\/th\u003e\n\u003cth\u003eQtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003cth\u003eCharacter\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e\u003cstrong style=\"color:#86efac !important;\"\u003e12W3v3-4, 4 ohm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e0.796\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e48.3 Hz\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003e43.5 Hz\u003c\/td\u003e\n\u003ctd style=\"background:#14532d !important;color:#86efac !important;\"\u003ePunchy, slight lift at fc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e12W3v3-2, 2 ohm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.901\u003c\/td\u003e\n\u003ctd\u003e50.4 Hz\u003c\/td\u003e\n\u003ctd\u003e41.8 Hz\u003c\/td\u003e\n\u003ctd\u003eWarmer, more lift at fc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"pow-chartbox\"\u003e\u003csvg class=\"pow-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\u003crect x=\"0\" y=\"0\" width=\"1260\" height=\"420\" fill=\"#0b1424\"\u003e\u003c\/rect\u003e\u003crect x=\"90\" y=\"50\" width=\"1080\" height=\"300\" fill=\"#111c30\" stroke=\"#4a3520\" stroke-width=\"1\"\u003e\u003c\/rect\u003e\u003cline x1=\"210\" y1=\"50\" x2=\"210\" y2=\"350\" 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x1=\"800\" y1=\"255\" x2=\"850\" y2=\"255\" stroke=\"#c68a4a\" stroke-width=\"4.5\"\u003e\u003c\/line\u003e\u003ctext x=\"862\" y=\"261\" font-size=\"16\" fill=\"#e2e8f0\" font-family=\"sans-serif\" font-weight=\"700\"\u003e12W3v3-4\u003c\/text\u003e\u003cpolyline points=\"90,350 101,350 112,350 124,350 135,350 146,350 157,349 169,342 180,336 191,330 202,323 214,317 225,311 236,304 247,298 259,292 270,285 281,279 292,272 304,266 315,260 326,253 337,247 349,241 360,235 371,228 382,222 394,216 405,210 416,204 428,198 439,192 450,186 461,181 472,175 484,170 495,164 506,159 518,154 529,150 540,145 551,141 562,137 574,134 585,130 596,127 607,124 619,121 630,119 641,117 652,115 664,113 675,112 686,111 698,110 709,109 720,108 731,107 742,107 754,107 765,106 776,106 787,106 799,106 810,106 821,106 832,106 844,107 855,107 866,107 877,107 889,107 900,108 911,108 923,108 934,108 945,109 956,109 968,109 979,109 990,110 1001,110 1012,110 1024,110 1035,111 1046,111 1058,111 1069,111 1080,111 1091,112 1102,112 1114,112 1125,112 1136,112 1147,112 1159,112 1170,113\" fill=\"none\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/polyline\u003e\u003cline x1=\"800\" y1=\"287\" x2=\"850\" y2=\"287\" stroke=\"#64748b\" stroke-width=\"2.5\"\u003e\u003c\/line\u003e\u003ctext x=\"862\" y=\"293\" font-size=\"16\" fill=\"#94a3b8\" font-family=\"sans-serif\"\u003e12W3v3-2\u003c\/text\u003e\u003ctext x=\"560\" y=\"404\" font-size=\"17\" fill=\"#c68a4a\" font-family=\"sans-serif\" font-weight=\"700\" text-anchor=\"middle\"\u003eFrequency (Hz)\u003c\/text\u003e\u003ctext x=\"102\" y=\"36\" font-size=\"16\" fill=\"#d99058\" font-family=\"sans-serif\" font-weight=\"700\"\u003eJL Audio 12W3v3, per driver in this enclosure. Anechoic half-space, no cabin gain.\u003c\/text\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv class=\"pow-alert\"\u003e\u003cp\u003e\u003cstrong\u003eBoth coils, one cabinet.\u003c\/strong\u003e Qtc runs 0.796 to 0.901 depending on which W3v3 you fit. That whole span sits in the range JL voices this series for, a little lift at resonance rather than a maximally flat alignment. It is a deliberate choice on their part and this box respects it instead of fighting 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\u003cdiv class=\"pow-section\"\u003e\u003cp\u003eFull dimensions, cutout, mounting depth, and hardware details are listed under the \u003cstrong\u003eEnclosures\u003c\/strong\u003e tab.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"pow-cta\"\u003e\n\u003ch3\u003eCut for the 12W3v3. Built in Tennessee.\u003c\/h3\u003e\n\u003cp\u003eEnclosure only. The JL Audio 12W3v3 drivers are purchased separately. Built to order in Tullahoma, Tennessee on our own CNC equipment. Questions on fitment or amplifier matching, call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44589663518809,"sku":"PO 12D-S W JL W3V3 BB","price":389.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44603385544793,"sku":"PO 12D-S W JL W3V3 B","price":369.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_W_JL_W3V3_Front.jpg?v=1790365803"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-alpine-s2-w12","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | Alpine S2-W12","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Alpine S2-W12\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e0.85 ft3 Net Per Driver\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e0.91 ft3 Gross Per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.78\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eRear-Firing Wedge\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 7.63\/13.46\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eThe Alpine S2-W12 in a Dual-Driver Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eAlpine's S-Series 12 inch subwoofer. Dual voice coil, 600 W RMS and 1800 W peak, 15 mm one-way linear excursion on a 2.6 in voice coil and a 64 oz motor, rated 22 Hz to 200 Hz. Available as the S2-W12D4 and the S2-W12D2, and this cabinet is cut for either.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e0.91 cu ft gross per chamber produces 0.85 cu ft net after the driver's 0.06 cu ft displacement. That is Alpine's own stated ideal, the middle of their 0.61 to 1.06 cu ft recommended range.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA full divider runs floor to ceiling and front to back, giving each driver its own sealed 0.91 cu ft chamber. Neither cone loads against the other, so the pair stays predictable under hard excursion instead of modulating each other's air load. Both chambers are cut to the same volume as the single driver version of this cabinet, so the alignment is identical whichever you buy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe Alpine S2-W12 mounts on the vertical trunk-lid-side face and fires rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front of it stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the Alpine S2-W12\u003c\/h2\u003e\n\u003cp\u003e0.85 cubic feet net per driver produces a musical alignment on both coils, calculated from Alpine's published T\/S parameters. This is Alpine's own recommended sealed volume, not a number we picked.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers\u003c\/h3\u003e\n\u003cp\u003eS2-W12D4 Qtc 0.780 · S2-W12D2 Qtc 0.780 · fc 48.2 to 51.0 Hz · F3 44.2 to 46.7 Hz anechoic\u003c\/p\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eVertical baffle CNC cut to 10.75 in (273 mm), Alpine spec. Driver mounting depth required 4.88 in against 6.39 in available. Threaded inserts pressed into the baffle backside at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite, 12 gauge OFC pre-wired to both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring the Alpine S2-W12 Pair to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eEach S2-W12D4 carries dual 4 ohm coils, so a matched pair gives you four coils to work with. All four in parallel is 1 ohm, which many amplifiers are not stable into. Coils paralleled per driver with the drivers in series, or coils in series per driver with the drivers in parallel, both land at 4 ohms and that is the sensible target. Alpine's 8 AWG push terminals and voice coil jumpers let you make the change at the driver. Aim for 600 to 1200 W RMS total at the final impedance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet. 1 year limited warranty. Enclosure only, the Alpine S2-W12 drivers are purchased separately. Call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eAlpine S2-W12 Dual: A musical alignment in a Rear-Firing Wedge\u003c\/h2\u003e\n\u003cp\u003e0.85 cubic feet net per driver at Qtc 0.78, cut direct fit and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44589688520793,"sku":"PO 12D-S W S2 BB","price":369.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44589872513113,"sku":"PO 12D-S W S2 B","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_W_S2_Front.jpg?v=1790365757"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-one-audio-rsq3","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | One Audio RSq3","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | One Audio RSq3\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e1.20 ft3 Net Per Driver\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e1.43 ft3 Gross Per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.65 to 0.68\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eRear-Firing Wedge\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 11.94\/17.77\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eThe One Audio RSq3 in a Dual-Driver Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eOne Audio's Reference SQ 12 inch. A 76 mm four layer round wire coil on an 82 mm wind height, quoted at 32 mm of Xmax, with a moving mass north of 320 grams and a 1500 watt power rating. It is a heavy, long throw driver, and the numbers below follow from that.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e1.43 cu ft gross per chamber produces 1.20 cu ft net after the driver's 0.23 cu ft displacement. That displacement is two to four times what a typical 12 inch takes out of a box, which is why this cabinet is larger than its net volume alone would suggest.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA full divider runs floor to ceiling and front to back, giving each RSq3 its own sealed 1.43 cu ft chamber. Neither cone loads against the other, so the pair stays predictable under hard excursion instead of modulating each other's air load. Each chamber is cut to the same volume as the single driver version of this cabinet, so the alignment is identical whichever you buy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe RSq3 mounts on the vertical trunk-lid-side face and fires rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the One Audio RSq3\u003c\/h2\u003e\n\u003cp\u003e1.20 cubic feet net per driver is the published sealed recommendation for this driver, and it produces a well damped alignment on both coil versions. Calculated from One Audio's own published Thiele-Small parameters, which they give separately for each coil.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers\u003c\/h3\u003e\n\u003cp\u003eRSq3 D1 Qtc 0.679 · RSq3 D2 Qtc 0.649 · fc 37.2 to 38.0 Hz · F3 39.6 to 40.8 Hz anechoic\u003c\/p\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eVertical baffle CNC cut to 11.125 in (283 mm). Driver mounting depth 8.50 in. Threaded inserts pressed into the baffle backside at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite, 12 gauge OFC pre-wired to both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring the One Audio RSq3 Pair to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eThe RSq3 ships as a dual 1 ohm or a dual 2 ohm, and the impedance maths on this driver deserves care. A single dual 1 ohm gives 2 ohms in series or \u003cstrong\u003e0.5 ohms in parallel\u003c\/strong\u003e, which almost nothing on the market is stable into. A single dual 2 ohm gives 4 ohms in series or 1 ohm in parallel.\u003c\/p\u003e\n\u003cp\u003eWith two drivers there are more combinations and most of them are very low. On a pair of dual 1 ohm coils, all four in parallel is 0.25 ohms, which is not a load, it is a short as far as most amplifiers are concerned. Sensible targets are \u003cstrong\u003e1 ohm or 2 ohms\u003c\/strong\u003e on the dual 1 ohm pair and \u003cstrong\u003e2 ohms or 4 ohms\u003c\/strong\u003e on the dual 2 ohm pair. Work the wiring out before you buy the amplifier, not after.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet. 1 year limited warranty. Enclosure only, the One Audio RSq3 drivers are purchased separately. Call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eOne Audio RSq3 Dual: Well Damped in a Rear-Firing Wedge\u003c\/h2\u003e\n\u003cp\u003e1.20 cubic feet net per driver at Qtc 0.65 to 0.68, cut direct fit and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44603029422169,"sku":"PO 12D-S W RSQ3 BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44603385610329,"sku":"PO 12D-S W RSQ3 B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_W_RSQ3_Front.jpg?v=1790365884"},{"product_id":"performance-optimized-down-fire-sealed-dual-12-enclosure-powerbass-xl-1240t","title":"Performance Optimized Down Fire Sealed Dual 12\" Enclosure | PowerBass XL-1240T","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 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for the PowerBass XL-1240T\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\"\u003e0.40 cu ft Net Per Driver\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eStandoffs Included\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eShallow Mount\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\"\u003e0.40\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net per driver\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.145\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc sealed\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e53.6 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\"\u003e7.28 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height, excludes standoffs\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.\u003c\/p\u003e\n\u003cdiv class=\"df-tier\"\u003e\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.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA shared 30 by 15 inch platform, with cabinet height as the variable.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint.\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\"\u003eThreaded inserts, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003eThreaded 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\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.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eBuilt Around the PowerBass XL-1240T\u003c\/h3\u003e\n\u003cp\u003eThe baffle is bored to the XL-1240T's \u003cstrong\u003e281 mm cutout\u003c\/strong\u003e and the airspace is built to \u003cstrong\u003e0.40 cubic feet net per driver\u003c\/strong\u003e. This is a shallow mount driver: \u003cstrong\u003e3.8 inch mounting depth\u003c\/strong\u003e, 7.5 mm of one-way excursion on a 2 in voice coil, 400 watts RMS and 800 peak, rated 33 Hz to 450 Hz.\u003c\/p\u003e\n\u003cp\u003ePowerBass names 0.40 cubic feet as the optimum sealed volume and lists 0.30 to 0.85 as the acceptable range. They do not recommend a ported enclosure for this driver at all.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eTwo Fully Separate Chambers\u003c\/h3\u003e\n\u003cp\u003eA full divider gives each XL-1240T its own sealed chamber at the same 0.40 cubic feet the single driver version delivers, so the alignment is identical whichever you buy. Neither cone loads against the other, which keeps the pair predictable under hard excursion.\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\u003e0.40 cubic feet net per driver\u003c\/strong\u003e: true internal airspace after panel thickness, bracing and the driver's own 0.1260 cubic feet of displacement are accounted for. Gross is 0.5260 per chamber.\u003c\/p\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eWorth knowing when you compare figures.\u003c\/strong\u003e PowerBass quotes its 0.40 cubic foot recommendation as internal airspace that \u003cem\u003eincludes\u003c\/em\u003e the driver's displacement, so their number is gross where ours is net. Building 0.40 net rather than 0.40 gross puts this cabinet slightly on the larger side of their recommendation, well inside the 0.30 to 0.85 range they publish.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eWhat the Alignment Actually Is\u003c\/h3\u003e\n\u003cp\u003eCalculated from PowerBass's own published Thiele-Small parameters: Fs 33 Hz, Qts 0.526, Vas 42.37 litres. At 0.40 cubic feet net that gives \u003cstrong\u003esystem Qtc 1.145\u003c\/strong\u003e, fc 71.9 Hz and F3 53.6 Hz anechoic. That is a deliberately small-box alignment with real lift at resonance.\u003c\/p\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eA shallow driver in a small box behaves like a shallow driver in a small box.\u003c\/strong\u003e The XL-T trades cone area and excursion for a 3.8 inch mounting depth, and the sealed alignment that suits it is a tight one rather than a maximally flat one. Those figures are anechoic and exclude cabin gain, which adds real output below 50 Hz in a car.\u003c\/p\u003e\u003c\/div\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\u003cp\u003eThe cabinet measures \u003cstrong\u003e30.00 inches wide by 15 inches deep by 7.28 inches tall, measured in the down fire position and excluding standoffs\u003c\/strong\u003e. The standoffs hold 1.75 inches under the baffle, so the finished stack sits near \u003cstrong\u003e9.03 inches\u003c\/strong\u003e.\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.\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 to both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eStandoffs Included\u003c\/h4\u003e\n\u003cp\u003eCustom fit standoffs ship with every enclosure at \u003cstrong\u003e1.75 inches\u003c\/strong\u003e, uninstalled so you can place them to suit your floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eRear Vented Motor, So the Floor Is Not a Problem\u003c\/h3\u003e\n\u003cp\u003eThe XL-T uses a \u003cstrong\u003evented rear motor\u003c\/strong\u003e, so the pole vent can be obstructed without harming the driver. On a down fire cabinet that matters more than it sounds: the motor sits inside the enclosure firing at the top panel, and a driver that needs its pole vent kept clear forces either a taller box or a compromised one.\u003c\/p\u003e\n\u003cp\u003eThis cabinet clears 2.73 inches above the motor at 5.03 inches of internal height. The feet ship uninstalled, so front firing or up firing stays available to you at install time without changing anything about the enclosure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Wiring\u003c\/h3\u003e\n\u003cp\u003eEach XL-1240T is a single 4 ohm voice coil, so a matched pair gives 2 ohms in parallel or 8 ohms in series. There is nothing in between and no 1 ohm trap to fall into on this driver. Target 800 watts RMS across the pair.\u003c\/p\u003e\n\u003cp\u003eThe enclosure carries a 1 year limited warranty. Bring your own XL-1240Ts; 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\u003eBuilt one at a time in Tullahoma, Tennessee, with standoffs and a 1 year limited warranty. Questions on fitment or amplifier matching, call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44603986870361,"sku":"PO 12D-S DF XLT","price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO10D-SW2XLDInternal_0a71b871-1170-4db1-8b45-c006adb33b23.jpg?v=1788137863"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-image-dynamics-idmax12-v4","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | Image Dynamics IDMAX12 V.4","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Image Dynamics IDMAX12 V.4\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e1.25 ft3 Net Per Driver\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e1.43 ft3 Gross Per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 1.10 to 1.32\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eRear-Firing Wedge\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 11.61\/17.43\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eThe Image Dynamics IDMAX12 V.4 in a Dual-Driver Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eA 3 inch dual voice coil, 19 mm of one-way travel, a 500 watt RMS rating and the bolt-on field-replaceable basket the IDMAX line is known for. The alignment below follows from Image Dynamics' own published Thiele-Small parameters, which they give separately for each coil version.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e1.25 cubic feet net per driver is Image Dynamics' published Universal sealed airspace for the IDMAX12 V.4, and this cabinet is cut to it exactly.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA full divider runs floor to ceiling and front to back, giving each IDMAX12 V.4 its own sealed chamber of 1.43 cu ft gross. Neither cone loads against the other, so the pair stays predictable under hard excursion instead of modulating each other's air load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe IDMAX12 V.4 mounts on the vertical trunk-lid-side face and fires rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the Image Dynamics IDMAX12 V.4\u003c\/h2\u003e\n\u003cp\u003e1.25 cubic feet net per driver is Image Dynamics' published Universal sealed airspace for the IDMAX12 V.4, and this cabinet is cut to it exactly.\u003c\/p\u003e\n\u003cp\u003eThat airspace produces a \u003cstrong\u003ehigh-Q sealed alignment\u003c\/strong\u003e, Qtc 1.10 to 1.32 depending on coil. It is not a Butterworth box and it is not trying to be. Reaching Qtc 0.707 on the D2 coil would take about 9.8 cubic feet, roughly 8 times this cabinet, and the extension gained would be under two hertz. What the higher Q buys is a rise around 45 Hz and a half-power point of 32.5 to 34.3 Hz anechoic, which is lower than a flatter alignment of the same size would reach. In a vehicle, cabin gain works on everything below that.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers\u003c\/h3\u003e\n\u003cp\u003eD2 Qtc 1.097 · D4 Qtc 1.323 · fc 45.3 Hz · F3 32.5 to 34.3 Hz anechoic\u003c\/p\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eVertical baffle CNC cut to 11.024 in. Driver mounting depth 8.071 in. Threaded inserts pressed into the baffle backside at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite, 12 gauge OFC pre-wired to both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring the Image Dynamics IDMAX12 V.4 Pair to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eThe IDMAX12 V.4 ships as a D2 or a D4. A pair of D2 coils gives 0.5 ohms with all four in parallel, which almost nothing is stable into, and a pair of D4 gives 1 ohm. Sensible targets are \u003cstrong\u003e1 or 2 ohms\u003c\/strong\u003e on a D2 pair and \u003cstrong\u003e2 or 4 ohms\u003c\/strong\u003e on a D4 pair. Work the wiring out before you buy the amplifier, not after.\u003c\/p\u003e\n\u003cp\u003ePower handling is 1000 watts RMS total across the pair. Aim for roughly 700 to 1000 watts at the final wired impedance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet. 1 year limited warranty. Enclosure only, the Image Dynamics IDMAX12 V.4 drivers are purchased separately. Call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eImage Dynamics IDMAX12 V.4 Dual: Built to Image Dynamics' Own Airspace\u003c\/h2\u003e\n\u003cp\u003e1.25 cubic feet net per driver at Qtc 1.10 to 1.32, cut direct fit and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44606154244185,"sku":"PO 12D-S W IDMAX BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44606156832857,"sku":"PO 12D-S W IDMAX B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_W_IDMAX_Front.jpg?v=1790354967"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-powerbass-xl1244","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | PowerBass XL-1244","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | PowerBass XL-1244\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e1.25 ft3 Net Per Driver\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e1.41 ft3 Gross Per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.71\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eRear-Firing Wedge\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 11.45\/17.28\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eThe PowerBass XL-1244 in a Dual-Driver Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eA 2 inch vented BASV voice coil with Aero-Vent perimeter cooling, a DDC coated non-pressed paper cone, dual stack magnets and a 400 watt RMS rating. The alignment below is computed from PowerBass's own published Thiele-Small parameters.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e1.25 cubic feet net per driver is PowerBass's published sealed recommendation for the XL-1244, and this cabinet is cut to it exactly. Gross is 1.41 cu ft per chamber before the driver's 0.1210 cu ft displacement.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA full divider runs floor to ceiling and front to back, giving each XL-1244 its own sealed 1.41 cu ft gross chamber. Neither cone loads against the other, so the pair stays predictable under hard excursion. Each chamber is cut to the same volume the single version delivers, so the alignment is identical whichever you buy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe XL-1244 mounts on the vertical trunk-lid-side face and fires rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the PowerBass XL-1244\u003c\/h2\u003e\n\u003cp\u003eAt 1.25 cubic feet net the XL-1244 runs a system Qtc of \u003cstrong\u003e0.714\u003c\/strong\u003e, essentially a textbook Butterworth alignment. PowerBass publishes 0.850 for this driver at the same airspace, so the cabinet and the maker agree.\u003c\/p\u003e\n\u003cp\u003eF3 lands at 46.2 Hz anechoic, before any cabin gain.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers\u003c\/h3\u003e\n\u003cp\u003eQtc 0.714 · fc 46.6 Hz · F3 46.2 Hz anechoic · Qts 0.421, Vas 66.37 L, Fs 27.5 Hz as published\u003c\/p\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eVertical baffle CNC cut to 11.0625 in. Driver mounting depth 5.7500 in required. Threaded inserts pressed into the baffle backside at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite, 12 gauge OFC pre-wired to both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring the PowerBass XL-1244 Pair to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eEach driver is a single 4 ohm voice coil. A pair is \u003cstrong\u003e2 ohms in parallel\u003c\/strong\u003e or 8 ohms in series. Two ohms is the usual choice and almost every monoblock is stable there.\u003c\/p\u003e\n\u003cp\u003ePower handling is 800 watts RMS total across the pair. Aim for roughly 560 to 800 watts at the final wired impedance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet. 1 year limited warranty. Enclosure only, the PowerBass XL-1244 drivers are purchased separately. Call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003ePowerBass XL-1244 Dual: Cut to PowerBass's Own Airspace\u003c\/h2\u003e\n\u003cp\u003e1.25 cubic feet net per driver at Qtc 0.71, F3 46.2 Hz, built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44607102845017,"sku":"PO 12D-S W XL1244 BB","price":389.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44607104385113,"sku":"PO 12D-S W XL1244 B","price":369.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12D-SWXLFront.jpg?v=1788134247"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-powerbass-2xl1240d","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | PowerBass 2XL-1240D","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | PowerBass 2XL-1240D\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e0.75 ft3 Net Per Driver\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e0.90 ft3 Gross Per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.60\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eRear-Firing Wedge\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 7.35\/13.17\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eThe PowerBass 2XL-1240D in a Dual-Driver Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eA 2.5 inch dual 4 ohm voice coil, a woven glass fibre cone with pressed kraft paper reinforcement, an NBR surround, cast aluminium basket and a 450 watt RMS rating. The alignment below is computed from PowerBass's own published Thiele-Small parameters.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e0.75 cubic feet net per driver is PowerBass's published sealed recommendation for the 2XL-1240D, and this cabinet is cut to it exactly. Gross is 0.90 cu ft per chamber before the driver's 0.1260 cu ft displacement.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA full divider runs floor to ceiling and front to back, giving each 2XL-1240D its own sealed 0.90 cu ft gross chamber. Neither cone loads against the other, so the pair stays predictable under hard excursion. Each chamber is cut to the same volume the single version delivers, so the alignment is identical whichever you buy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe 2XL-1240D mounts on the vertical trunk-lid-side face and fires rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the PowerBass 2XL-1240D\u003c\/h2\u003e\n\u003cp\u003eAt 0.75 cubic feet net the 2XL-1240D runs a system Qtc of \u003cstrong\u003e0.601\u003c\/strong\u003e, a dry, tightly controlled alignment. PowerBass publishes 0.587 for this driver at the same airspace, so the cabinet and the maker agree.\u003c\/p\u003e\n\u003cp\u003eF3 lands at 62.3 Hz anechoic. That is high for a 12 inch, and it is the driver rather than the cabinet: at a Qts of 0.334 the 2XL-1240D is past the knee for sealed loading, so no sealed box gets it much below 61 Hz. Adding volume makes it worse, not better. If you want the deepest sealed 12 inch in this range, the XL-1244 reaches 46.2 Hz.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers\u003c\/h3\u003e\n\u003cp\u003eQtc 0.601 · fc 51.6 Hz · F3 62.3 Hz anechoic · Qts 0.334, Vas 47.50 L, Fs 28.7 Hz as published\u003c\/p\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eVertical baffle CNC cut to 11.0000 in. Driver mounting depth 5.4000 in required. Threaded inserts pressed into the baffle backside at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite, 12 gauge OFC pre-wired to both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring the PowerBass 2XL-1240D Pair to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eDual 4 ohm coils on each driver. Across the pair the sensible targets are \u003cstrong\u003e1 ohm or 4 ohms\u003c\/strong\u003e. One ohm needs an amplifier rated for it; check before you wire.\u003c\/p\u003e\n\u003cp\u003ePower handling is 900 watts RMS total across the pair. Aim for roughly 630 to 900 watts at the final wired impedance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet. 1 year limited warranty. Enclosure only, the PowerBass 2XL-1240D drivers are purchased separately. Call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003ePowerBass 2XL-1240D Dual: Cut to PowerBass's Own Airspace\u003c\/h2\u003e\n\u003cp\u003e0.75 cubic feet net per driver at Qtc 0.60, F3 62.3 Hz, built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44607111888985,"sku":"PO 12D-S W 2XL1240D BB","price":369.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44607113396313,"sku":"PO 12D-S W 2XL1240D B","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12D-SW2XLDFront.jpg?v=1788135369"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-stereo-integrity-sql12","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | Stereo Integrity SQL-12","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Stereo Integrity SQL-12\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e1.00 ft3 Net Per Driver\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e1.18 ft3 Gross Per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.76\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eRear-Firing Wedge\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 9.62\/15.45\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eThe Stereo Integrity SQL-12 in a Dual-Driver Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eA 3 inch dual voice coil on a 21 T-m motor, 26 mm of one-way travel, a 1000 watt RMS rating and the flat spider and long coil the SQL line was built around.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e1.00 cubic feet net per driver, 1.18 cu ft gross per chamber before the driver's 0.150 cu ft displacement.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA full divider run floor to ceiling and front to back, giving each SQL-12 its own sealed 1.18 cu ft gross chamber. No cone loads against another, so the set stays predictable under hard excursion. Every chamber is cut to the same volume the single version delivers, so the alignment is identical whichever you buy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe SQL-12 mounts on the vertical trunk-lid-side face and fires rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the Stereo Integrity SQL-12\u003c\/h2\u003e\n\u003cp\u003eAt 1.00 cubic feet net the SQL-12 runs a system Qtc of \u003cstrong\u003e0.764\u003c\/strong\u003e with resonance at 45.7 Hz. That is a well damped alignment. Half power lands at 42.6 Hz anechoic, before any cabin gain.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers\u003c\/h3\u003e\n\u003cp\u003eQtc 0.764 · fc 45.7 Hz · F3 42.6 Hz anechoic · computed from Qts 0.57, Vas 22.5 L, Fs 34.1 Hz\u003c\/p\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eVertical baffle CNC cut to 11.33 in. Driver mounting depth 7.000 in required. Threaded inserts pressed into the baffle backside at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and dividers seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite, 12 gauge OFC pre-wired to every driver position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring the Stereo Integrity SQL-12 Pair to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eThe SQL-12 comes as a dual 2 ohm or a dual 4 ohm. Across a pair the sensible targets are \u003cstrong\u003e1 or 2 ohms on D2 coils\u003c\/strong\u003e and 2 or 4 ohms on D4. Confirm which coil version you have before you buy the amplifier.\u003c\/p\u003e\n\u003cp\u003ePower handling is 2000 watts RMS total across the set. Aim for roughly 1400 to 2000 watts at the final wired impedance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet. 1 year limited warranty. Enclosure only, the Stereo Integrity SQL-12 drivers are purchased separately. Call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eStereo Integrity SQL-12 Dual in a Rear-Firing Wedge\u003c\/h2\u003e\n\u003cp\u003e1.00 cubic feet net per driver at Qtc 0.76, F3 42.6 Hz, cut direct fit and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44607333793881,"sku":"PO 12D-S W SQL12 BB","price":379.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44607333990489,"sku":"PO 12D-S W SQL12 B","price":359.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_W_SQL12_Front.jpg?v=1788649679"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-audiofrog-gb12","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | Audiofrog GB12","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Audiofrog GB12\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e1.00 ft3 Net Per Driver\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e1.18 ft3 Gross Per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.851 to 0.883\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eDual Chamber Wedge\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 9.60\/15.42\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Audiofrog GB12 in a Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eAudiofrog's GB12, the same 76 mm coil and copper-capped motor on a 510.7 square centimeter cone, in two switchable coil versions. The alignment below is computed from Audiofrog's published Thiele-Small parameters, which are carried per coil version rather than shared, because Audiofrog measures each one.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e1.00 cubic feet net per driver. That is Audiofrog's own recommended sealed volume for the GB12, 28.3 liters in their documentation, and theirs is a net figure exactly as ours is: their own sealed drawing works out to that volume only after the basket displacement comes off.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA full divider runs floor to ceiling and front to back, giving each GB12 its own sealed 1.18 cu ft gross chamber. Neither cone loads against the other, so the pair stays predictable under hard excursion instead of modulating each other's air load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe drivers mount on the vertical trunk-lid-side face and fire rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofers\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cones firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the Audiofrog GB12\u003c\/h2\u003e\n\u003cp\u003eQtc lands at 0.851 to 0.883 depending on which coil version you fit, with system resonance at 51.2 Hz. That is a moderately damped alignment rather than a textbook 0.707: it trades a little transient dryness for a slight lift through the midbass, which is the voicing Audiofrog designed the box recommendation around. Half power lands at 42.9 to 44.0 Hz anechoic, before any cabin gain.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers\u003c\/h3\u003e\n\u003cp\u003eQtc 0.851 to 0.883 · fc 51.2 Hz · F3 42.9 to 44.0 Hz anechoic\u003c\/p\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eVertical baffle CNC cut to 11.0630 in at both positions. Mounting depth available is 7.154 in against the 6.654 in the GB12 requires. Threaded inserts pressed into the baffle backside at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003ePerformance Series Construction, Driver-Specific Tuning\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite, 12 gauge OFC pre-wired to both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring the Pair to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eThe GB series does not bring its coils out to the terminals. Each driver carries an \u003cstrong\u003eimpedance selection switch\u003c\/strong\u003e, and the terminal cup wires the two positions in parallel, so the switch alone decides what the amplifier sees. \u003cstrong\u003eSet both drivers to the HIGH position.\u003c\/strong\u003e A pair of D2 drivers at 4 ohms each presents 2 ohms; a pair of D4 drivers at 8 ohms each presents 4 ohms. Leaving both in the low position halves that again, to 0.5 ohms on a D2 pair, which almost no amplifier is stable into. Set both switches the same way and set them before you mount the drivers, because the switch faces the motor.\u003c\/p\u003e\n\u003cp\u003ePower handling is 1000 watts RMS total across the pair. Aim for roughly 700 to 1000 watts at the impedance you select.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet. 1 year limited warranty. Enclosure only, the drivers are purchased separately. Call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eAudiofrog GB12 Dual: Built to Audiofrog's Own Alignment\u003c\/h2\u003e\n\u003cp\u003e1.00 cubic feet net per driver at Qtc 0.851 to 0.883, F3 42.9 to 44.0 Hz, cut direct fit and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44612662231129,"sku":"PO 12D-S W GB12 BB","price":379.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44612662853721,"sku":"PO 12D-S W GB12 B","price":359.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO12D-SWGBFront_34c38e54-0608-457e-bff9-b3b4e79f19eb.jpg?v=1788128592"},{"product_id":"professional-series-ported-dual-12-enclosure-ground-zero-gzrw-12xspl","title":"Professional Series Ported Dual 12\" Enclosure | Ground Zero GZRW 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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:#001264;color:#99abff}.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(91,120,255,.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\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve inch box for a pair of GZRW 12XSPL, one shared chamber vented at 32.5 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.80 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 32.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 32.8 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the GZRW 12XSPL\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.80\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\"\u003e32.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.8\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e36.2\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 32.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet holds two GZRW 12XSPL in 1.804 cubic feet net, vented at 32.5 Hz through a 36.2 square inch port. F3 lands at 32.8 Hz with 2.88 dB of passband ripple. It measures 40.00 inches wide, 16.00 tall and 12.75 deep.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThreaded insert kit ships with this box.\u003c\/strong\u003e Ground Zero does not publish the mounting hole locations for the GZRW 12XSPL, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n  \u003cp\u003eBoth drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 36.2 square inches of area at 32.5 Hz, and the design power for the velocity and excursion checks is 2400 W for the pair. Passband ripple holds at 2.88 dB across the tuning, with F3 at 32.8 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eGround Zero logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the Ground Zero mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded insert kit ships with this box\u003c\/h4\u003e\n\u003cp\u003eThreaded insert kit included, inserts NOT pre-installed: the manufacturer publishes no mounting hole locations, so the kit ships with the box for installation when the woofer goes in: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, allen key and gasket tape.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 2400 W\u003c\/h4\u003e\n\u003cp\u003eThe 36.2 square inch slot beside the woofer is sized so the\n    channel runs 22.6 metres per second and the mouth 15.1 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 6.50 inches along its wall and turns once along the back wall for another 27.94 inches, which is why a 32.5 Hz tuning fits a 12.75 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eEvery driver is run through the Performance Optimized wedge and down-fire before this chassis; the Professional box is where a driver lands when that smaller envelope, 30 inches wide and 18 inches deep with a triangular side port, cannot give it what it needs at its rated power. The GZRW 12XSPL did not clear the channel 25.1 m\/s over 0.55 x core 44.9 gate there: the nearest wedge that fits is 27.5 by 9.75 by 15.39 inches with a 24.7 square inch port, and no tuning, width or depth inside that envelope passes. The slot on this box reaches 36.2 square inches.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 4.72 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 62 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e40.00\" W x 16.00\" H x 12.75\" D external. A windowed brace runs front to back beside the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our dual 12 inch Professional envelope, built around the GZRW 12XSPL's own frame and mounting depth, with both woofers on one face and the port on the left. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003ePort mouth velocity peaks at 15.1 m\/s against the 17 m\/s point where a slot begins to chuff, and 22.6 m\/s in the channel, both measured at the pair's design power. Both drivers must be the same model and the same coil: mixing them puts unequal loads on one shared chamber, and neither driver sees the airspace it was picked for. Ground Zero does not publish the mounting hole locations for the GZRW 12XSPL, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 26 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 9.1 mm of its 22.5 mm at 2400 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44857458819161,"sku":"Pro 12D-P GZRW12","price":520.99,"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_61d7f03d-ee7a-48a7-8a20-76e4062717de.jpg?v=1788925335"},{"product_id":"professional-series-ported-dual-12-enclosure-sundown-audio-sa-12","title":"Professional Series Ported Dual 12\" Enclosure | Sundown Audio SA-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%,#001a91 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 p{font-size:1.1em;font-weight:300;opacity:.93;margin:0 0 22px;color:#d6d3d1}.df-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}.df-badge{background:rgba(91,120,255,.18);border:1px solid #5b78ff;color:#99abff;padding:7px 16px;border-radius:18px;font-size:.8em;font-weight:600}.df-stats{display:flex;flex-wrap:wrap;background:#1c1917}.df-stat{flex:1 1 200px;text-align:center;padding:26px 16px;border-right:1px solid #292524;border-bottom:1px solid #292524}.df-stat .n{display:block;font-size:1.6em;font-weight:800;color:#7089ff}.df-stat .l{display:block;font-size:.78em;color:#a8a29e;text-transform:uppercase;letter-spacing:.6px;margin-top:5px}.df-section{padding:42px 36px;border-bottom:1px solid #292524;background:#0c0a09}.df-section:nth-of-type(even){background:#1c1917}.df-section 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solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 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:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 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:#001264;color:#99abff}.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(91,120,255,.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\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve inch box for a pair of SA-12, one shared chamber vented at 35.5 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e2.68 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 30.8 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the SA-12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e2.68\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\"\u003e35.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e30.8\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e65.2\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet holds two SA-12 in 2.679 cubic feet net, vented at 35.5 Hz through a 65.2 square inch port. F3 lands at 30.8 Hz with 1.97 dB of passband ripple. It measures 42.00 inches wide, 16.00 tall and 17.12 deep.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThreaded insert kit ships with this box.\u003c\/strong\u003e Sundown Audio does not publish the mounting hole locations for the SA-12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n  \u003cp\u003eBoth drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 65.2 square inches of area at 35.5 Hz, and the design power for the velocity and excursion checks is 3000 W for the pair. Passband ripple holds at 1.97 dB across the tuning, with F3 at 30.8 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSundown Audio logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the Sundown Audio mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded insert kit ships with this box\u003c\/h4\u003e\n\u003cp\u003eThreaded insert kit included, inserts NOT pre-installed: the manufacturer publishes no mounting hole locations, so the kit ships with the box for installation when the woofer goes in: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, allen key and gasket tape.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 3000 W\u003c\/h4\u003e\n\u003cp\u003eThe 65.2 square inch slot beside the woofer is sized so the\n    channel runs 21.9 metres per second and the mouth 16.8 metres per second at the driver's rated power, under the\n    17 metres per second where a slot starts to chuff. The channel runs 8.88 inches along its wall and turns once along the back wall for another 22.68 inches, which is why a 35.5 Hz tuning fits a 17.12 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eEvery driver is run through the Performance Optimized wedge and down-fire before this chassis; the Professional box is where a driver lands when that smaller envelope, 30 inches wide and 18 inches deep with a triangular side port, cannot give it what it needs at its rated power. The SA-12 did not clear the port gate there. The calmest wedge port that fits that envelope is 24.7 square inches at 29.0 by 11.62 by 17.27 inches, and its mouth runs 22.4 metres per second at 1500 W against the 17 metres per second line where a port starts to chuff. That port would stay clean to about 865 W. The slot on this box reaches 65.2 square inches and holds the mouth at 16.8 metres per second at 3000 W.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 6.66 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 71 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat Sundown Audio recommend\u003c\/h4\u003e\n\u003cp\u003eSundown Audio publish a vented box for the SA-12 at 1.75 cubic feet on a basis they do not state, tuned to 35.0 Hz. This cabinet holds 2.68 cubic feet net and tunes to 35.5 Hz. They call for a port area of 26 sq in. The extra air lowers the low corner rather than raising output at tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e42.00\" W x 16.00\" H x 17.12\" D external. A windowed brace runs front to back beside the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our dual 12 inch Professional envelope, built around the SA-12's own frame and mounting depth, with both woofers on one face and the port on the left. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003ePort mouth velocity peaks at 16.8 m\/s against the 17 m\/s point where a slot begins to chuff, and 21.9 m\/s in the channel, both measured at the pair's design power. Both drivers must be the same model and the same coil: mixing them puts unequal loads on one shared chamber, and neither driver sees the airspace it was picked for. Sundown Audio does not publish the mounting hole locations for the SA-12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 28 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 9.1 mm of its 22.0 mm at 3000 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44857460719705,"sku":"Pro 12D-P SA12","price":644.99,"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_133e7859-cd6b-4b2f-9b2f-4e8522a75f96.jpg?v=1788925465"},{"product_id":"professional-series-ported-dual-12-enclosure-sundown-audio-u-series-v-1-12","title":"Professional Series Ported Dual 12\" Enclosure | Sundown Audio U-Series v.1 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 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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:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 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:#001264;color:#99abff}.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(91,120,255,.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\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve inch box for a pair of U-Series v.1 12, one shared chamber vented at 39.0 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e2.74 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 39.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.2 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the U-Series v.1 12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e2.74\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\"\u003e39.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.2\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e76.1\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 39.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet holds two U-Series v.1 12 in 2.739 cubic feet net, vented at 39.0 Hz through a 76.1 square inch port. F3 lands at 33.2 Hz with 4.09 dB of passband ripple. It measures 42.00 inches wide, 16.00 tall and 17.62 deep.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThreaded insert kit ships with this box.\u003c\/strong\u003e Sundown Audio does not publish the mounting hole locations for the U-Series v.1 12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n  \u003cp\u003eBoth drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 76.1 square inches of area at 39.0 Hz, and the design power for the velocity and excursion checks is 3000 W for the pair. Passband ripple holds at 4.09 dB across the tuning, with F3 at 33.2 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSundown Audio logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the Sundown Audio mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded insert kit ships with this box\u003c\/h4\u003e\n\u003cp\u003eThreaded insert kit included, inserts NOT pre-installed: the manufacturer publishes no mounting hole locations, so the kit ships with the box for installation when the woofer goes in: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, allen key and gasket tape.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 3000 W\u003c\/h4\u003e\n\u003cp\u003eThe 76.1 square inch slot beside the woofer is sized so the\n    channel runs 21.2 metres per second and the mouth 16.7 metres per second at the driver's rated power, under the\n    17 metres per second where a slot starts to chuff. The channel runs 8.62 inches along its wall and turns once along the back wall for another 19.30 inches, which is why a 39.0 Hz tuning fits a 17.62 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eEvery driver is run through the Performance Optimized wedge and down-fire before this chassis; the Professional box is where a driver lands when that smaller envelope, 30 inches wide and 18 inches deep with a triangular side port, cannot give it what it needs at its rated power. The U-Series v.1 12 did not clear the port gate there. The calmest wedge port that fits that envelope is 24.7 square inches at 30.0 by 11.00 by 16.64 inches, and its mouth runs 22.7 metres per second at 1500 W against the 17 metres per second line where a port starts to chuff. That port would stay clean to about 839 W. The slot on this box reaches 76.1 square inches and holds the mouth at 16.7 metres per second at 3000 W.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 6.85 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 71 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat Sundown Audio recommend\u003c\/h4\u003e\n\u003cp\u003eSundown Audio publish a vented box for the U-Series v.1 12 at 2.00 cubic feet on a basis they do not state, tuned to 35.0 Hz. This cabinet holds 2.74 cubic feet net and tunes to 39.0 Hz. They call for a port area of 32 sq in. The extra air lowers the low corner rather than raising output at tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e42.00\" W x 16.00\" H x 17.62\" D external. A windowed brace runs front to back beside the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our dual 12 inch Professional envelope, built around the U-Series v.1 12's own frame and mounting depth, with both woofers on one face and the port on the left. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003ePort mouth velocity peaks at 16.7 m\/s against the 17 m\/s point where a slot begins to chuff, and 21.2 m\/s in the channel, both measured at the pair's design power. Both drivers must be the same model and the same coil: mixing them puts unequal loads on one shared chamber, and neither driver sees the airspace it was picked for. Sundown Audio does not publish the mounting hole locations for the U-Series v.1 12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 31 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 9.1 mm of its 30.0 mm at 3000 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44857461145689,"sku":"Pro 12D-P U12","price":658.99,"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_cd2efcd9-c6df-40c3-8358-66cf16571640.jpg?v=1788925498"},{"product_id":"professional-series-ported-dual-12-enclosure-sony-xs-w124es","title":"Professional Series Ported Dual 12\" Enclosure | Sony XS-W124ES","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%,#001a91 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solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 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:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 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:#001264;color:#99abff}.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(91,120,255,.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\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve inch box for a pair of XS-W124ES, one shared chamber vented at 35.0 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e2.38 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 36.9 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the XS-W124ES\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e2.38\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\"\u003e35.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e36.9\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.6\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet holds two XS-W124ES in 2.383 cubic feet net, vented at 35.0 Hz through a 32.6 square inch port. F3 lands at 36.9 Hz with 2.97 dB of passband ripple. It measures 40.00 inches wide, 16.00 tall and 12.75 deep.\u003c\/p\u003e\n  \u003cp\u003eBoth drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 32.6 square inches of area at 35.0 Hz, and the design power for the velocity and excursion checks is 1200 W for the pair. Passband ripple holds at 2.97 dB across the tuning, with F3 at 36.9 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSony logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the Sony mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eThreaded inserts pressed into the baffle on the published 12.126 inch bolt circle, stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 1200 W\u003c\/h4\u003e\n\u003cp\u003eThe 32.6 square inch slot beside the woofer is sized so the\n    channel runs 20.8 metres per second and the mouth 13.5 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 6.75 inches along its wall and turns once along the back wall for another 9.24 inches, which is why a 35.0 Hz tuning fits a 12.75 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eA single XS-W124ES also builds in the Performance Optimized ported wedge and ported down-fire, the smaller and cheaper single-driver boxes. A pair takes this Professional cabinet: one shared chamber on a 2.25 inch three-layer baffle with both woofers flush in the outer layer, and a slot port gated at 1200 W for the pair.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eThis cabinet is 4.72 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 57 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e40.00\" W x 16.00\" H x 12.75\" D external. A windowed brace runs front to back beside the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our dual 12 inch Professional envelope, built around the XS-W124ES's own frame and mounting depth, with both woofers on one face and the port on the left. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003ePort mouth velocity peaks at 13.5 m\/s against the 17 m\/s point where a slot begins to chuff, and 20.8 m\/s in the channel, both measured at the pair's design power. Both drivers must be the same model and the same coil: mixing them puts unequal loads on one shared chamber, and neither driver sees the airspace it was picked for.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 28 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 7.9 mm of its 8.9 mm at 1200 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44867966599257,"sku":"Pro 12D-P W124ES","price":479.99,"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_5a3a56c6-b6b2-4fc4-a184-efedfe5b9c07.jpg?v=1789013110"},{"product_id":"professional-series-ported-dual-12-enclosure-stereo-integrity-sql-12","title":"Professional Series Ported Dual 12\" Enclosure | Stereo Integrity SQL-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%,#001a91 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 p{font-size:1.1em;font-weight:300;opacity:.93;margin:0 0 22px;color:#d6d3d1}.df-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}.df-badge{background:rgba(91,120,255,.18);border:1px solid #5b78ff;color:#99abff;padding:7px 16px;border-radius:18px;font-size:.8em;font-weight:600}.df-stats{display:flex;flex-wrap:wrap;background:#1c1917}.df-stat{flex:1 1 200px;text-align:center;padding:26px 16px;border-right:1px solid #292524;border-bottom:1px solid #292524}.df-stat .n{display:block;font-size:1.6em;font-weight:800;color:#7089ff}.df-stat .l{display:block;font-size:.78em;color:#a8a29e;text-transform:uppercase;letter-spacing:.6px;margin-top:5px}.df-section{padding:42px 36px;border-bottom:1px solid #292524;background:#0c0a09}.df-section:nth-of-type(even){background:#1c1917}.df-section h3{color:#fff;font-size:1.45em;font-weight:700;margin:0 0 14px;border-left:4px solid #5b78ff;padding-left:14px}.df-section p{margin:0 0 14px;color:#d6d3d1}.df-section 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 #5b78ff;border-radius:8px;padding:20px 22px}.df-card h4{color:#99abff;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:#001264;border-left:4px solid #5b78ff;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 #5b78ff;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 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 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:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 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:#001264;color:#99abff}.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(91,120,255,.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\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve inch box for a pair of SQL-12, one shared chamber vented at 29.0 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e3.47 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 29.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 25.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the SQL-12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e3.47\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\"\u003e29.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e25.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e61.6\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 29.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet holds two SQL-12 in 3.470 cubic feet net, vented at 29.0 Hz through a 61.6 square inch port. F3 lands at 25.0 Hz with 1.29 dB of passband ripple. It measures 40.50 inches wide, 16.00 tall and 20.25 deep.\u003c\/p\u003e\n  \u003cp\u003eBoth drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 61.6 square inches of area at 29.0 Hz, and the design power for the velocity and excursion checks is 2400 W for the pair. Passband ripple holds at 1.29 dB across the tuning, with F3 at 25.0 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eStereo Integrity logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the Stereo Integrity mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eThreaded inserts pressed into the baffle on the woofer's mounting hole locations, stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 2400 W\u003c\/h4\u003e\n\u003cp\u003eThe 61.6 square inch slot beside the woofer is sized so the\n    channel runs 22.3 metres per second and the mouth 16.9 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 12.25 inches along its wall and turns once along the back wall for another 23.25 inches, which is why a 29.0 Hz tuning fits a 20.25 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eEvery driver is run through the Performance Optimized wedge and down-fire before this chassis; the Professional box is where a driver lands when that smaller envelope, 30 inches wide and 18 inches deep with a triangular side port, cannot give it what it needs at its rated power. The SQL-12 did not clear the port gate there. The calmest wedge port that fits that envelope is 24.7 square inches at 28.5 by 10.25 by 15.89 inches, and its mouth runs 17.8 metres per second at 1000 W against the 17 metres per second line where a port starts to chuff. That port would stay clean to about 911 W. The slot on this box reaches 61.6 square inches and holds the mouth at 16.9 metres per second at 2400 W.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 7.59 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 76 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat Stereo Integrity recommend\u003c\/h4\u003e\n\u003cp\u003eStereo Integrity publish a vented box for the SQL-12 at 1.70 cubic feet on a basis they do not state, tuned to 27.0 Hz. This cabinet holds 3.47 cubic feet net and tunes to 29.0 Hz. The extra air lowers the low corner rather than raising output at tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e40.50\" W x 16.00\" H x 20.25\" D external. A windowed brace runs front to back beside the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our dual 12 inch Professional envelope, built around the SQL-12's own frame and mounting depth, with both woofers on one face and the port on the left. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003ePort mouth velocity peaks at 16.9 m\/s against the 17 m\/s point where a slot begins to chuff, and 22.3 m\/s in the channel, both measured at the pair's design power. Both drivers must be the same model and the same coil: mixing them puts unequal loads on one shared chamber, and neither driver sees the airspace it was picked for.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 23 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 11.5 mm of its 22.1 mm at 2400 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44954577698905,"sku":"Pro 12D-P SQL12","price":711.99,"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_0569477a-c4a3-475e-8d2b-9f4d65a7282d.jpg?v=1790105734"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-audiomobile-encore-4412","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | Audiomobile Encore 4412","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Dual Audiomobile Encore 4412\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e0.90 ft3 Net per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e2.07 ft3 Gross\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.77\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eTwo Separate Chambers\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 8.46\/14.28\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eA Pair of Audiomobile Encore 4412 in a Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eThe Encore 4412 is Audiomobile's low-profile 12 inch subwoofer: 4.9 inches of mounting depth on a cast aluminum frame, a 3 inch dual 4 ohm voice coil, 1000 watts RMS and 2000 watts maximum, 19.1 mm of one-way excursion at 70 percent Bl, a composite sandwich cone with a carbon fiber dust cap. Every figure comes from Audiomobile's own Encore Series specification sheet, the Klippel data measured with the two 4 ohm coils in parallel, which reproduces its own moving mass and compliance. Dealer tables print a second, different parameter set for this driver; it is not used here.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e0.90 cubic feet net per chamber is inside Audiomobile's 0.7 to 1.25 cubic feet sealed range for the Audiomobile Encore 4412 and above the 0.8 cubic foot (22 liter) minimum printed on its sheet. It is a little under the 1.23 cubic foot Butterworth box, so the Encore 4412 lands at Qtc 0.765 with system resonance at 47.3 Hz and half power at 44.0 Hz: a touch of punch above maximally flat, 0.1 dB at most, without giving up extension.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA bonded full-height 3\/4 inch MDF divider splits the cabinet into two sealed chambers of 0.90 cubic feet net each, so every driver sees exactly the airspace it would have in the single wedge. Two drivers sharing one volume load each other; the divider removes that, and each chamber carries its own polyfill.\u003c\/p\u003e\n\u003cp\u003eThe cabinet solved at 32.00 inches wide, pinned at the 32 inch cap for a dual and with the depth absorbing the airspace, 16 inches tall, 8.46 inches deep at the top and 14.28 at the base. One shared side-mounted terminal cup feeds both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe drivers mount on the vertical trunk-lid-side face and fire rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for a pair of Audiomobile Encore 4412\u003c\/h2\u003e\n\u003cp\u003eHalf power lands at 44.0 Hz anechoic, before any cabin gain. Audiomobile publishes the cone area outright, 498.76 square centimeters, and the excursion, 19.1 mm each way. The driver displacement, 0.11 cubic feet, is not on Audiomobile's sheet and is an estimate; it only affects the gross figure, the net airspace is what the cabinet was cut to.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers (Per Chamber)\u003c\/h3\u003e\n\u003ctable class=\"df-tier\"\u003e\n\u003ctr\u003e\n\u003cth\u003eDriver (per chamber)\u003c\/th\u003e\n\u003cth\u003eSystem Qtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEncore 4412, dual 4 ohm coils in parallel\u003c\/td\u003e\n\u003ctd\u003eQtc 0.765\u003c\/td\u003e\n\u003ctd\u003e47.3 Hz\u003c\/td\u003e\n\u003ctd\u003e44.0 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eVertical baffle CNC cut to 11.00 in (280 mm) at each position, the cutout Audiomobile prints. The rear panel rakes 20 degrees, so the cavity deepens from 8.46 in at the top to 14.28 in at the base, and the 4.9 in motor clears it with 3.07 in to spare above its top edge, well past the 0.75 in this line requires. The cosmetic recess is cut to Audiomobile's published 12.65 in frame. Audiomobile publishes no mounting hole locations for the Encore, so the baffle ships undrilled with a threaded insert kit and stainless machine screws: set the driver in the recess, mark its holes, drill, press the inserts and bolt it down.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWhat the Numbers Rest On\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face, the outer layer machined as a flush recess.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eAudiomobile's Own Sheet\u003c\/h4\u003e\n\u003cp\u003eFs 32.0 Hz, Qts 0.518, Qes 0.538, Qms 13.424, Vas 30.12 L, Sd 498.76 cm2, Mms 289.48 g, Cms 0.086 mm\/N, Bl 13.5 T-m, coils in parallel. Reference efficiency 0.176 percent, about 84.5 dB at 1 W derived from it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring a pair of Audiomobile Encore 4412 to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eThe Encore 4412 carries two 4 ohm voice coils: wire them in parallel for a nominal 2 ohm load (1.68 ohm DC, the configuration Audiomobile measured) or in series for 8 ohms. Wire both drivers identically. Two drivers with their coils in parallel, then paralleled together, present 1 ohm and need an amplifier rated for it; each driver in parallel and the pair in series, or each in series and the pair in parallel, gives 4 ohms, the safe load on any amplifier. Confirm the final load against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003ePower handling is 1000 watts RMS per driver. Aim for roughly 700 to 1000 watts per driver at the impedance you wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet with the gloss black acrylic baffle insert, one shared pre-wired terminal cup, 12 gauge OFC to both driver positions. Polyfill wall lining installed. Threaded insert kit and stainless machine screws in the box. 1 year limited warranty. Enclosure only, the drivers are purchased separately. Call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eDual Audiomobile Encore 4412: Built to 0.90 Cubic Feet per Chamber\u003c\/h2\u003e\n\u003cp\u003eQtc 0.765, F3 44.0 Hz, cut direct fit to the Encore 4412 and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44957911449689,"sku":"PO 12D-S W ENCORE BB","price":389.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44957911777369,"sku":"PO 12D-S W ENCORE B","price":369.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_W_ENCORE_Front.jpg?v=1790162784"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-image-dynamics-idq-12","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | Image Dynamics IDQ 12","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Dual Image Dynamics IDQ12 V4\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e1.25 ft3 Net per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e2.77 ft3 Gross\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 1.05 to 1.13\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eTwo Separate Chambers\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 11.28\/17.10\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eA Pair of Image Dynamics IDQ12 V4 in a Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eThe IDQ12 V4 is the 12 inch of Image Dynamics' IDQ line: 375 watts RMS, 14.5 mm of one-way excursion, 511 square centimeters of cone area and a 5.77 inch mounting depth, sold in dual 2 ohm and dual 4 ohm versions. The two coils share the frame, cutout and depth but not the motor figures, so this page prints an alignment for each. Parameters are the per-coil data for each version; the fit dimensions come from Image Dynamics' own IDQ12 cutout template.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e1.25 cubic feet net per chamber. The IDQ12 V4 is a high-Qts driver, 0.68 on the dual 2 ohm coil and 0.74 on the dual 4 ohm, which is the Image Dynamics house character rather than a quirk of this box: a maximally flat sealed alignment would take about 21 cubic feet for the D2, and with Qts above 0.707 the D4 cannot reach it in any sealed volume. In this cabinet the D2 lands at Qtc 1.048 with system resonance at 52.4 Hz and half power at 40.4 Hz, the D4 at Qtc 1.130, 53.5 Hz and 40.1 Hz. Both carry a 1.5 to 2.0 dB rise centred near 70 Hz: a punchy sealed alignment, and this page shows that curve rather than a flat one.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA bonded full-height 3\/4 inch MDF divider splits the cabinet into two sealed chambers of 1.25 cubic feet net each. Two drivers sharing one volume load each other; the divider removes that, and each chamber carries its own polyfill.\u003c\/p\u003e\n\u003cp\u003eThe cabinet is pinned at the 32 inch dual width cap, 16 inches tall, 11.28 inches deep at the top and 17.10 at the base, with the depth absorbing the airspace. One shared side-mounted terminal cup feeds both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe drivers mount on the vertical trunk-lid-side face and fire rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofers\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cones firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the IDQ12 V4\u003c\/h2\u003e\n\u003cp\u003eHalf power lands at 40.1 Hz (D4) to 40.4 Hz (D2) anechoic, before any cabin gain. The driver displacement, 0.10 cubic feet per driver, is already taken out of the net figure.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers (Per Chamber)\u003c\/h3\u003e\n\u003ctable class=\"df-tier\"\u003e\n\u003ctr\u003e\n\u003cth\u003eDriver (per chamber)\u003c\/th\u003e\n\u003cth\u003eSystem Qtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIDQ12 V4, Dual 2 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 1.048\u003c\/td\u003e\n\u003ctd\u003e52.4 Hz\u003c\/td\u003e\n\u003ctd\u003e40.4 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIDQ12 V4, Dual 4 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 1.130\u003c\/td\u003e\n\u003ctd\u003e53.5 Hz\u003c\/td\u003e\n\u003ctd\u003e40.1 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eVertical baffle CNC cut to 10.937 in at each position. Image Dynamics' template prints a 276 mm (10.866 in) cutout; the cut runs a few hundredths larger, matching our single IDQ 12 wedge, and the 12.48 in (317 mm) frame still covers it with margin. The rear panel rakes 20 degrees, so the cavity deepens from 11.28 in at the top to 17.10 in at the base, and the 5.77 in motor clears it with 5.01 in to spare. Threaded inserts are pressed on Image Dynamics' published 11.85 in (301 mm) bolt circle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWhat the Numbers Rest On\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face, the outer layer machined as a flush recess.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePer-Coil Parameters\u003c\/h4\u003e\n\u003cp\u003eD2: Fs 34 Hz, Qts 0.68, Qes 0.79, Qms 5.38, Vas 48.6 L. D4: Fs 35 Hz, Qts 0.74, Qes 0.87, Qms 5.01, Vas 47.2 L. Sd 511 cm2 both.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring a Pair of IDQ12 V4 to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eWire both drivers identically. With the dual 2 ohm version, each driver in series (4 ohms) and the pair in parallel gives 2 ohms, and each driver in series with the pair in series gives 8 ohms. Paralleling everything drops to 0.5 ohm, which almost no amplifier will run. With the dual 4 ohm version, each driver in parallel (2 ohms) and the pair in parallel gives 1 ohm, which needs an amplifier rated 1 ohm stable; each driver in parallel with the pair in series, or each in series with the pair in parallel, gives 4 ohms, the safe load on any amplifier. Confirm the final load against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003ePower handling is 375 watts RMS per driver, 750 across the pair. Aim for roughly 262 to 375 watts per driver at the impedance you wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet with the gloss black acrylic baffle insert, one shared pre-wired terminal cup, 12 gauge OFC to both driver positions. Polyfill wall lining installed in both chambers. Threaded inserts pre-installed, stainless machine screws included. 1 year limited warranty. Enclosure only, the drivers are purchased separately. Call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eDual Image Dynamics IDQ12 V4: Built to 1.25 Cubic Feet per Chamber\u003c\/h2\u003e\n\u003cp\u003eQtc 1.05 (D2) to 1.13 (D4), F3 40.1 Hz (D4) to 40.4 Hz (D2), cut direct fit to the IDQ12 V4 and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black \/ None","offer_id":47332120428633,"sku":"PO 12D-S W IDQ BB","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ Add 2 IDQ 12D4 Subwoofers","offer_id":47332158177369,"sku":null,"price":939.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ Add 2 IDQ 12D2 Subwoofers","offer_id":47332158210137,"sku":null,"price":939.99,"currency_code":"USD","in_stock":true},{"title":"None \/ None","offer_id":47332150149209,"sku":"PO 12D-S W IDQ B None","price":369.99,"currency_code":"USD","in_stock":true},{"title":"None \/ Add 2 IDQ 12D4 Subwoofers","offer_id":47332158242905,"sku":null,"price":919.99,"currency_code":"USD","in_stock":true},{"title":"None \/ Add 2 IDQ 12D2 Subwoofers","offer_id":47332158275673,"sku":null,"price":919.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_W_IDQ_Front.jpg?v=1790354674"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-focal-sub-30-kxe","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | Focal SUB 30 KXE","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Dual Focal SUB 30 KXE\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e1.25 ft3 Net per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e2.85 ft3 Gross\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.71\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eTwo Separate Chambers\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 11.62\/17.44\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eA Pair of Focal SUB 30 KXE in a Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eThe SUB 30 KXE is the 12 inch of Focal's K2 Power line: an aramid-fiber K2 sandwich cone on a butyl surround, a 65 mm dual 4 ohm voice coil, 800 watts RMS and 1600 watts maximum, and 22.5 mm of one-way excursion, which moves 1130 cubic centimeters of air at the limit, well past a typical 12. It carries the same deep motor as the 10 inch KXE, 6.77 inches of mounting depth on a 12.52 inch frame. Every figure comes from Focal's own SUB 30 KXE technical sheet. One number on it is soft: Focal prints 50 liters of Vas and draws its closed-box response chart on it, while its own compliance implies 52.5 and the published moving mass and resonance nearer 58 liters. At 58 the Qtc in this cabinet would read 0.75 instead of 0.71, so treat the alignment as a range a few hundredths wide.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e1.25 cubic feet net per chamber sits just under the 1.30 cubic foot Butterworth volume on Focal's published Fs 29 Hz, Qts 0.46 and Vas 50 liters: Qtc 0.714, a hair above maximally flat, with system resonance at 45.0 Hz and half power at 44.6 Hz. Focal's own closed-box response chart for this driver is drawn at 25 and 35 liters (0.88 and 1.24 cubic feet); this volume sits at the larger of the two.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA bonded full-height 3\/4 inch MDF divider splits the cabinet into two sealed chambers of 1.25 cubic feet net each, so every driver sees exactly the airspace it would have in the single wedge. Two drivers sharing one volume load each other; the divider removes that, and each chamber carries its own polyfill.\u003c\/p\u003e\n\u003cp\u003eThe cabinet is pinned at the 32 inch dual width cap, 16 inches tall, 11.62 inches deep at the top and 17.44 at the base, with the depth absorbing the airspace. One shared side-mounted terminal cup feeds both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe drivers mount on the vertical trunk-lid-side face and fire rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for a pair of Focal SUB 30 KXE\u003c\/h2\u003e\n\u003cp\u003eHalf power lands at 44.6 Hz anechoic, before any cabin gain. Focal publishes the cone area outright, 502 square centimeters, and the driver displacement, 4 liters, which is already taken out of the net figure.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers (Per Chamber)\u003c\/h3\u003e\n\u003ctable class=\"df-tier\"\u003e\n\u003ctr\u003e\n\u003cth\u003eDriver (per chamber)\u003c\/th\u003e\n\u003cth\u003eSystem Qtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSUB 30 KXE, dual 4 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 0.714\u003c\/td\u003e\n\u003ctd\u003e45.0 Hz\u003c\/td\u003e\n\u003ctd\u003e44.6 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eThe baffle is cut to 11.23 in (285 mm). Loudspeaker Database lists a 284 mm cutout, but Focal's own drawing puts the basket at 284.2 mm just under the flange, which a 284 mm hole would not pass; the 285 mm cut clears it and the 318 mm frame still covers it with margin. The rear panel rakes 20 degrees, so the cavity deepens from 11.62 in at the top to 17.44 in at the base, and the 6.77 in motor clears it with 4.35 in to spare. Focal's drawing shows eight mounting holes but prints no bolt circle, so the baffle ships undrilled with a threaded insert kit and stainless machine screws: set the driver in the recess, mark its holes, drill, press the inserts and bolt it down.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWhat the Numbers Rest On\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face, the outer layer machined as a flush recess.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eFocal's Own Sheet\u003c\/h4\u003e\n\u003cp\u003eFs 29 Hz, Qts 0.46, Qes 0.49, Qms 6.1, Vas 50 L, Sd 502 cm2, Mms 183 g, Cms 0.15 mm\/N, Bl 21.3 N\/A, Re 6.4 ohm with the coils in series. Sensitivity 86.5 dB at 2.83 V.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring a pair of Focal SUB 30 KXE to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eEach SUB 30 KXE carries two 4 ohm voice coils (3.2 ohms DC each): series for 8 ohms, parallel for 2. Wire both drivers identically. Each driver in series with the pair in parallel gives 4 ohms, the safe load on any amplifier; each driver in parallel with the pair in series also gives 4; all four coils in parallel is 1 ohm and needs an amplifier rated for it; all in series is 16 ohms. Confirm the final load against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003ePower handling is 800 watts RMS per driver, 1600 across the pair. Aim for roughly 560 to 800 watts per driver at the impedance you wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet with the gloss black acrylic baffle insert, one shared pre-wired terminal cup, 12 gauge OFC to both driver positions. Polyfill wall lining installed. Threaded insert kit and stainless machine screws in the box. 1 year limited warranty. Enclosure only, the drivers are purchased separately. Call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eDual Focal SUB 30 KXE: Built to a Butterworth Alignment\u003c\/h2\u003e\n\u003cp\u003e1.25 cubic feet net per chamber at Qtc 0.714, F3 44.6 Hz, cut direct fit and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":47332630659161,"sku":"PO 12D-S W KXE BB","price":389.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":47332630691929,"sku":"PO 12D-S W KXE B","price":369.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_W_KXE_Front.jpg?v=1790364305"},{"product_id":"professional-series-ported-dual-12-enclosure-skar-audio-evl-12","title":"Professional Series Ported Dual 12\" Enclosure | Skar Audio EVL-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%,#001a91 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 p{font-size:1.1em;font-weight:300;opacity:.93;margin:0 0 22px;color:#d6d3d1}.df-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}.df-badge{background:rgba(91,120,255,.18);border:1px solid #5b78ff;color:#99abff;padding:7px 16px;border-radius:18px;font-size:.8em;font-weight:600}.df-stats{display:flex;flex-wrap:wrap;background:#1c1917}.df-stat{flex:1 1 200px;text-align:center;padding:26px 16px;border-right:1px solid #292524;border-bottom:1px solid #292524}.df-stat .n{display:block;font-size:1.6em;font-weight:800;color:#7089ff}.df-stat 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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:#001264;color:#99abff}.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(91,120,255,.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\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve inch box for a pair of EVL-12, one shared chamber vented at 35.0 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e3.13 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 29.3 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the EVL-12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e3.13\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\"\u003e35.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e29.3\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e72.5\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet holds two EVL-12 in 3.131 cubic feet net, vented at 35.0 Hz through a 72.5 square inch port. F3 lands at 29.3 Hz with 4.10 dB of passband ripple. It measures 42.00 inches wide, 16.00 tall and 18.50 deep.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThreaded insert kit ships with this box.\u003c\/strong\u003e Skar Audio does not publish the mounting hole locations for the EVL-12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n  \u003cp\u003eBoth drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 72.5 square inches of area at 35.0 Hz, and the design power for the velocity and excursion checks is 3000 W for the pair. Passband ripple holds at 4.10 dB across the tuning, with F3 at 29.3 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSkar Audio logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the Skar Audio mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded insert kit ships with this box\u003c\/h4\u003e\n\u003cp\u003eThreaded insert kit included, inserts NOT pre-installed: the manufacturer publishes no mounting hole locations, so the kit ships with the box for installation when the woofer goes in: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, allen key and gasket tape.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 3000 W\u003c\/h4\u003e\n\u003cp\u003eThe 72.5 square inch slot beside the woofer is sized so the\n    channel runs 21.7 metres per second and the mouth 16.9 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 9.75 inches along its wall and turns once along the back wall for another 19.80 inches, which is why a 35.0 Hz tuning fits a 18.50 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eEvery driver is run through the Performance Optimized wedge and down-fire before this chassis; the Professional box is where a driver lands when that smaller envelope, 30 inches wide and 18 inches deep with a triangular side port, cannot give it what it needs at its rated power. The EVL-12 did not clear the port gate there. The calmest wedge port that fits that envelope is 24.7 square inches at 27.5 by 10.88 by 16.52 inches, and its mouth runs 20.2 metres per second at 1250 W against the 17 metres per second line where a port starts to chuff. That port would stay clean to about 887 W. The slot on this box reaches 72.5 square inches and holds the mouth at 16.9 metres per second at 3000 W.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 7.19 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 73 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat Skar Audio recommend\u003c\/h4\u003e\n\u003cp\u003eSkar Audio publish a vented box for the Skar Audio EVL-12 at 2.00 cubic feet net, tuned to 32.0 Hz. This cabinet holds 3.13 cubic feet net and tunes to 35.0 Hz. The extra air lowers the low corner rather than raising output at tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e42.00\" W x 16.00\" H x 18.50\" D external. A windowed brace runs front to back beside the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our dual 12 inch Professional envelope, built around the EVL-12's own frame and mounting depth, with both woofers on one face and the port on the left. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003ePort mouth velocity peaks at 16.9 m\/s against the 17 m\/s point where a slot begins to chuff, and 21.7 m\/s in the channel, both measured at the pair's design power. Both drivers must be the same model and the same coil: mixing them puts unequal loads on one shared chamber, and neither driver sees the airspace it was picked for. Skar Audio does not publish the mounting hole locations for the EVL-12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 28 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 9.1 mm of its 23.5 mm at 3000 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":47334581633113,"sku":"Pro 12D-P EVL12","price":683.99,"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_67be79b6-9d25-4cb4-8ec0-33d5d3fdbff7.jpg?v=1790422519"},{"product_id":"professional-series-ported-dual-12-enclosure-skar-audio-vd-12","title":"Professional Series Ported Dual 12\" Enclosure | Skar Audio VD-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%,#001a91 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.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(91,120,255,.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\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve inch box for a pair of VD-12, one shared chamber vented at 34.0 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e2.86 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 36.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the VD-12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e2.86\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\"\u003e34.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e36.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e36.2\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet holds two VD-12 in 2.857 cubic feet net, vented at 34.0 Hz through a 36.2 square inch port. F3 lands at 36.5 Hz with 1.11 dB of passband ripple. It measures 40.00 inches wide, 16.00 tall and 14.25 deep.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThreaded insert kit ships with this box.\u003c\/strong\u003e Skar Audio does not publish the mounting hole locations for the VD-12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n  \u003cp\u003eBoth drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 36.2 square inches of area at 34.0 Hz, and the design power for the velocity and excursion checks is 1200 W for the pair. Passband ripple holds at 1.11 dB across the tuning, with F3 at 36.5 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSkar Audio logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the Skar Audio mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded insert kit ships with this box\u003c\/h4\u003e\n\u003cp\u003eThreaded insert kit included, inserts NOT pre-installed: the manufacturer publishes no mounting hole locations, so the kit ships with the box for installation when the woofer goes in: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, allen key and gasket tape.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 1200 W\u003c\/h4\u003e\n\u003cp\u003eThe 36.2 square inch slot beside the woofer is sized so the\n    channel runs 21.6 metres per second and the mouth 14.4 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 8.00 inches along its wall and turns once along the back wall for another 6.89 inches, which is why a 34.0 Hz tuning fits a 14.25 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eA single VD-12 also builds in the Performance Optimized ported wedge and ported down-fire, the smaller and cheaper single-driver boxes. A pair takes this Professional cabinet: one shared chamber on a 2.25 inch three-layer baffle with both woofers flush in the outer layer, and a slot port gated at 1200 W for the pair.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 5.28 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 60 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e40.00\" W x 16.00\" H x 14.25\" D external. A windowed brace runs front to back beside the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our dual 12 inch Professional envelope, built around the VD-12's own frame and mounting depth, with both woofers on one face and the port on the left. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003ePort mouth velocity peaks at 14.4 m\/s against the 17 m\/s point where a slot begins to chuff, and 21.6 m\/s in the channel, both measured at the pair's design power. Both drivers must be the same model and the same coil: mixing them puts unequal loads on one shared chamber, and neither driver sees the airspace it was picked for. Skar Audio does not publish the mounting hole locations for the VD-12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 27 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 8.0 mm of its 11.0 mm at 1200 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":47334583140441,"sku":"Pro 12D-P VD12","price":553.99,"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_aa78ebc2-6c4d-4b5b-86b8-0250786b8871.jpg?v=1790422561"},{"product_id":"professional-series-ported-dual-12-enclosure-skar-audio-vs-12","title":"Professional Series Ported Dual 12\" Enclosure | Skar Audio VS-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%,#001a91 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solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 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:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 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:#001264;color:#99abff}.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(91,120,255,.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\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve inch box for a pair of VS-12, one shared chamber vented at 35.0 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e3.14 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 32.6 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the VS-12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e3.14\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\"\u003e35.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.6\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e36.2\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet holds two VS-12 in 3.139 cubic feet net, vented at 35.0 Hz through a 36.2 square inch port. F3 lands at 32.6 Hz with 3.10 dB of passband ripple. It measures 40.00 inches wide, 16.00 tall and 14.75 deep.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThreaded insert kit ships with this box.\u003c\/strong\u003e Skar Audio does not publish the mounting hole locations for the VS-12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n  \u003cp\u003eBoth drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 36.2 square inches of area at 35.0 Hz, and the design power for the velocity and excursion checks is 1200 W for the pair. Passband ripple holds at 3.10 dB across the tuning, with F3 at 32.6 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSkar Audio logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the Skar Audio mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded insert kit ships with this box\u003c\/h4\u003e\n\u003cp\u003eThreaded insert kit included, inserts NOT pre-installed: the manufacturer publishes no mounting hole locations, so the kit ships with the box for installation when the woofer goes in: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, allen key and gasket tape.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 1200 W\u003c\/h4\u003e\n\u003cp\u003eThe 36.2 square inch slot beside the woofer is sized so the\n    channel runs 22.5 metres per second and the mouth 15.1 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 8.50 inches along its wall and turns once along the back wall for another 2.65 inches, which is why a 35.0 Hz tuning fits a 14.75 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eA single VS-12 also builds in the Performance Optimized ported wedge and ported down-fire, the smaller and cheaper single-driver boxes. A pair takes this Professional cabinet: one shared chamber on a 2.25 inch three-layer baffle with both woofers flush in the outer layer, and a slot port gated at 1200 W for the pair.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 5.46 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 60 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e40.00\" W x 16.00\" H x 14.75\" D external. A windowed brace runs front to back beside the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our dual 12 inch Professional envelope, built around the VS-12's own frame and mounting depth, with both woofers on one face and the port on the left. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003ePort mouth velocity peaks at 15.1 m\/s against the 17 m\/s point where a slot begins to chuff, and 22.5 m\/s in the channel, both measured at the pair's design power. Both drivers must be the same model and the same coil: mixing them puts unequal loads on one shared chamber, and neither driver sees the airspace it was picked for. Skar Audio does not publish the mounting hole locations for the VS-12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with two kits, one per woofer.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 28 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 7.8 mm of its 9.1 mm at 1200 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":47334584025177,"sku":"Pro 12D-P VS12","price":565.99,"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_73e15873-10e1-4622-ad7e-13db7c2b5a00.jpg?v=1790422590"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-skar-audio-evl-12","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | Skar Audio EVL-12","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Dual Skar Audio EVL-12\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e0.79 ft3 Net per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e1.89 ft3 Gross\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.62\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eTwo Separate Chambers\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e28.25\" x 16\" x 8.86\/14.68\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eA Pair of Skar EVL-12 in a Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eThe EVL-12 is Skar Audio's 12 inch: 1250 watts RMS, 23.5 mm of one-way excursion on 471 square centimeters of cone, and 7.61 inches of mounting depth. Every figure comes from the Thiele-Small table Skar prints on its EVL-12 product page. Skar publishes no driver displacement, so 0.129 cubic feet is our estimate from comparable 12 inch woofers, and it moves the net figure by a few hundredths at most. Worth knowing: the D4's printed Qts of 0.46 sits 9 percent from the 0.50 its own Qes and Qms reproduce; the D2's printed Qts of 0.42 sits 10 percent from the 0.46 its own Qes and Qms reproduce, so treat the Qtc as good to a few hundredths.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e0.79 cubic feet net per chamber is the smallest box that carries the EVL-12 frame, already under the Butterworth volume on the D4 figures, Fs 32.6 Hz, Qts 0.46 and Vas 18.2 liters: Qtc 0.619, half power at 51.0 Hz. One cabinet serves both coils: the EVL-12 D4 reads Qtc 0.619 with half power at 51.0 Hz, and the D2 reads Qtc 0.572 at 56.5 Hz. Skar's own recommended sealed volume is 1.75 cubic feet, which reads Qtc 0.54 on the D4 and 0.49 on the D2.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA bonded full-height 3\/4 inch MDF divider splits the cabinet into two sealed chambers of 0.79 cubic feet net each, so every driver sees exactly the airspace printed on this page. Two drivers sharing one volume load each other; the divider removes that, and each chamber carries its own polyfill.\u003c\/p\u003e\n\u003cp\u003eThe cabinet is 28.25 inches wide, 16 tall, 8.86 inches deep at the top and 14.68 at the base. One shared side-mounted terminal cup feeds both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe drivers mount on the vertical trunk-lid-side face and fire rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for a pair of Skar EVL-12\u003c\/h2\u003e\n\u003cp\u003eHalf power lands at 51.0 Hz anechoic on the D4, before any cabin gain. Driver displacement is not published, so an estimated 0.129 cubic feet is taken out of the net figure.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers (Per Chamber)\u003c\/h3\u003e\n\u003ctable class=\"df-tier\"\u003e\n\u003ctr\u003e\n\u003cth\u003eDriver (per chamber)\u003c\/th\u003e\n\u003cth\u003eSystem Qtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEVL-12 dual 4 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 0.619\u003c\/td\u003e\n\u003ctd\u003e43.9 Hz\u003c\/td\u003e\n\u003ctd\u003e51.0 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEVL-12 dual 2 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 0.572\u003c\/td\u003e\n\u003ctd\u003e43.8 Hz\u003c\/td\u003e\n\u003ctd\u003e56.5 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eThe baffle is cut to 11.22 in, Skar's published cutout, under the 12.50 in frame. The rear panel rakes 20 degrees, so the cavity deepens from 8.86 in at the top to 14.68 in at the base, and the 7.61 in motor clears it with 0.75 in to spare. Skar prints no bolt circle for the EVL-12, so the baffle ships undrilled with a threaded insert kit and stainless machine screws: set the driver in the recess, mark its holes, drill, press the inserts and bolt it down.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWhat the Numbers Rest On\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face, the outer layer machined as a flush recess.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSkar's Published Parameters\u003c\/h4\u003e\n\u003cp\u003eD4: Fs 32.6 Hz, Qts 0.46, Qes 0.56, Qms 5.00, Vas 18.2 L, Sd 471 cm2, Cms 0.059 mm\/N, Bl 12.8 N\/A, Mms 256 g. D2: Fs 32.2 Hz, Qts 0.42, Qes 0.51, Qms 4.83, Vas 19.1 L, Sd 471 cm2, Cms 0.060 mm\/N, Bl 27.0 N\/A, Mms 261 g.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring a pair of Skar EVL-12 to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eA pair of EVL-12 D4 drivers can land on 1 ohm with all four coils in parallel, 4 ohms as series pairs in parallel, or 16 ohms all in series. A pair of EVL-12 D2 drivers can land on 0.5 ohm with all four coils in parallel, 2 ohms as series pairs in parallel, or 8 ohms all in series. Anything under 1 ohm, and many amplifiers at 1 ohm, is outside what the amplifier is built for; series wiring is the safe default. Confirm the final load against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003ePower handling is 1250 watts RMS per driver, 2500 across the pair. Aim for roughly 875 to 1250 watts per driver at the impedance you wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet with the gloss black acrylic baffle insert, one shared pre-wired terminal cup, 12 gauge OFC to both driver positions. Polyfill wall lining installed. Threaded insert kit and stainless machine screws in the box. 1 year limited warranty. Enclosure only, the drivers are purchased separately. Call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eDual Skar Audio EVL-12: Cut for the Driver\u003c\/h2\u003e\n\u003cp\u003e0.79 cubic feet net per chamber at Qtc 0.619, F3 51.0 Hz on the D4, cut direct fit and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":47334587105369,"sku":"PO 12D-S W EVL12 BB","price":369.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":47334587203673,"sku":"PO 12D-S W EVL12 B","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_W_EVL12_Front.jpg?v=1790423135"},{"product_id":"performance-optimized-down-fire-sealed-dual-12-enclosure-skar-audio-evl-12","title":"Performance Optimized Down Fire Sealed Dual 12\" Enclosure | Skar Audio EVL-12","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 Dual 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of Skar EVL-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\"\u003e1.18 cu ft Net Total\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eSeparate Chambers\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eStandoffs Included\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\"\u003e0.59\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net per chamber\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.666\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D4 per chamber\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e50.3 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff, anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e9.11 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height, excludes standoffs\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\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.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA shared 30 by 15 inch platform, with cabinet height as the variable. This build sits on that platform at 9.11 inches tall, the height its 7.61 inch motor needs.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint.\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\"\u003eThreaded insert kit and stainless machine screws included; Skar prints no bolt circle, so you mark and drill from the driver.\u003c\/td\u003e\n\u003ctd\u003eThreaded 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, full-height divider and 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\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 driver's own 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 Skar EVL-12\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is cut to 11.22 in, Skar's published cutout, under the 12.50 in frame. The airspace lands on \u003cstrong\u003e0.59 cubic feet net per chamber\u003c\/strong\u003e, the volume the cabinet reaches at the height the 7.61 inch motor requires.\u003c\/p\u003e\n\u003cp\u003eThe EVL-12 is Skar Audio's 12 inch, rated \u003cstrong\u003e1250 watts RMS\u003c\/strong\u003e, with 23.5 mm of one-way excursion. It is 7.61 inches deep, which matters on a down fire, where the motor rises into the cabinet. Every figure comes from the Thiele-Small table Skar prints on its EVL-12 product page. Skar publishes no driver displacement, so 0.129 cubic feet is our estimate from comparable 12 inch woofers, and it moves the net figure by a few hundredths at most. Worth knowing: the D4's printed Qts of 0.46 sits 9 percent from the 0.50 its own Qes and Qms reproduce; the D2's printed Qts of 0.42 sits 10 percent from the 0.46 its own Qes and Qms reproduce, so treat the Qtc as good to a few hundredths.\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 0.59 cubic feet 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, 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\u003e0.59 cubic feet net per driver\u003c\/strong\u003e, out of 1.47 gross after the divider and an estimated 0.129 cubic foot driver displacement. The EVL-12's 7.61 inch mounting depth sets this cabinet's minimum height on the 30 by 15 platform, and the airspace comes with it: 0.59 cubic feet per chamber. The result is Qtc 0.666 with half power at 50.3 Hz on the D4, a gentle rolloff rather than a flat one. One cabinet serves both coils: the EVL-12 D4 reads Qtc 0.666 with half power at 50.3 Hz, and the D2 reads Qtc 0.615 at 55.2 Hz.\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 displacement (an estimate here, since Skar publishes none), not guessed from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003ctable class=\"df-tier\"\u003e\n\u003ctr\u003e\n\u003cth\u003eDriver (per chamber)\u003c\/th\u003e\n\u003cth\u003eSystem Qtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEVL-12 dual 4 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 0.666\u003c\/td\u003e\n\u003ctd\u003e47.2 Hz\u003c\/td\u003e\n\u003ctd\u003e50.3 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEVL-12 dual 2 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 0.615\u003c\/td\u003e\n\u003ctd\u003e47.2 Hz\u003c\/td\u003e\n\u003ctd\u003e55.2 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\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\u003cp\u003eThe cabinet measures \u003cstrong\u003e30.00 inches wide by 15.00 inches deep by 9.11 inches tall, measured in the down fire position and excluding standoffs\u003c\/strong\u003e. Plan the space around the installed height rather than the cabinet height: the standoffs hold 1.75 inches under the baffle, so the finished stack sits near \u003cstrong\u003e10.86 inches\u003c\/strong\u003e.\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 to both driver positions. 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\u003eStandoffs Included\u003c\/h4\u003e\n\u003cp\u003eSkar publishes no front clearance figure for the EVL-12, so this cabinet uses the Proline X standard \u003cstrong\u003e1.75 inch\u003c\/strong\u003e standoff, shipped with every enclosure and left uninstalled so you can place them to suit your floor. At that height the floor slot is 0.84 times the cone area, under the 1.0 we aim for. The 23.5 mm of excursion on this cone moves a lot of air, so if the floor allows, taller feet or a front-firing install give it more room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eMotor Clearance and Orientation\u003c\/h3\u003e\n\u003cp\u003eThe motors rise off the baffle into the cavity, so on a down fire cabinet the clearance that matters runs to the top panel. The 7.61 inch mounting depth puts the motor 6.11 inches into a 6.86 inch cavity, leaving \u003cstrong\u003e0.75 inches above the motor\u003c\/strong\u003e against a 0.75 inch minimum. Height was set by that clearance, not by the airspace: the volume alone would have allowed a lower box.\u003c\/p\u003e\n\u003cp\u003eSkar does not publish a position on down firing this driver, and this cabinet makes no claim on their behalf. The feet ship uninstalled, so if you would rather run it front firing or up firing, that is a decision you can make at install time without changing anything about the enclosure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower, Mounting and Warranty\u003c\/h3\u003e\n\u003cp\u003eSkar rates the EVL-12 at \u003cstrong\u003e1250 watts RMS\u003c\/strong\u003e, 2500 watts RMS combined. A pair of EVL-12 D4 drivers can land on 1 ohm with all four coils in parallel, 4 ohms as series pairs in parallel, or 16 ohms all in series. A pair of EVL-12 D2 drivers can land on 0.5 ohm with all four coils in parallel, 2 ohms as series pairs in parallel, or 8 ohms all in series. Anything under 1 ohm, and many amplifiers at 1 ohm, is outside what the amplifier is built for; series wiring is the safe default. Confirm the load against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003eSkar prints no bolt circle for the EVL-12, so the baffle ships undrilled with a threaded insert kit and stainless machine screws: set the driver in the recess, mark its holes, drill, press the inserts and bolt it down. The enclosure carries a 1 year limited warranty. Bring your own pair of EVL-12; 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\u003eBuilt one at a time in Tullahoma, Tennessee, with standoffs and a 1 year limited warranty. Questions on fitment or amplifier matching, call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":47334588121177,"sku":"PO 12D-S DF EVL12","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_DF_EVL12_Front.jpg?v=1790422699"},{"product_id":"professional-series-ported-dual-12-enclosure-nvx-vsw12v3","title":"Professional Series Ported Dual 12\" Enclosure | NVX VSW12v3","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%,#001a91 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:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 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:#001264;color:#99abff}.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(91,120,255,.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\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve inch box for a pair of VSW12v3, one shared chamber vented at 34.5 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.87 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 36.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the VSW12v3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.87\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\"\u003e34.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e36.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.6\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet holds two VSW12v3 in 1.868 cubic feet net, vented at 34.5 Hz through a 32.6 square inch port. F3 lands at 36.5 Hz with 1.02 dB of passband ripple. It measures 40.00 inches wide, 16.00 tall and 11.75 deep.\u003c\/p\u003e\n  \u003cp\u003eBoth drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 32.6 square inches of area at 34.5 Hz, and the design power for the velocity and excursion checks is 1440 W for the pair. Passband ripple holds at 1.02 dB across the tuning, with F3 at 36.5 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eNVX logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the NVX mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eThreaded inserts pressed into the baffle on the published 11.730 inch bolt circle, stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 1440 W\u003c\/h4\u003e\n\u003cp\u003eThe 32.6 square inch slot beside the woofer is sized so the\n    channel runs 22.2 metres per second and the mouth 14.4 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 5.75 inches along its wall and turns once along the back wall for another 18.80 inches, which is why a 34.5 Hz tuning fits a 11.75 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eA single VSW12v3 also builds in the Performance Optimized ported wedge and ported down-fire, the smaller and cheaper single-driver boxes. A pair takes this Professional cabinet: one shared chamber on a 2.25 inch three-layer baffle with both woofers flush in the outer layer, and a slot port gated at 1440 W for the pair.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 4.35 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 58 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e40.00\" W x 16.00\" H x 11.75\" D external. A windowed brace runs front to back beside the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our dual 12 inch Professional envelope, built around the VSW12v3's own frame and mounting depth, with both woofers on one face and the port on the left. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003ePort mouth velocity peaks at 14.4 m\/s against the 17 m\/s point where a slot begins to chuff, and 22.2 m\/s in the channel, both measured at the pair's design power. Both drivers must be the same model and the same coil: mixing them puts unequal loads on one shared chamber, and neither driver sees the airspace it was picked for.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 27 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 7.3 mm of its 13.5 mm at 1440 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":47335387168857,"sku":"Pro 12D-P VSW","price":496.99,"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_e72d8073-56cb-4d74-b5d9-803b2625ac39.jpg?v=1790455017"},{"product_id":"professional-series-ported-dual-12-enclosure-nvx-nsw12v3","title":"Professional Series Ported Dual 12\" Enclosure | NVX NSW12v3","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%,#001a91 100%);padding:54px 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solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 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:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 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:#001264;color:#99abff}.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(91,120,255,.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\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve inch box for a pair of NSW12v3, one shared chamber vented at 33.5 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e2.10 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 38.6 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the NSW12v3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e2.10\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\"\u003e33.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e38.6\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.6\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 33.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet holds two NSW12v3 in 2.095 cubic feet net, vented at 33.5 Hz through a 32.6 square inch port. F3 lands at 38.6 Hz with 0.56 dB of passband ripple. It measures 40.00 inches wide, 16.00 tall and 12.25 deep.\u003c\/p\u003e\n  \u003cp\u003eBoth drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 32.6 square inches of area at 33.5 Hz, and the design power for the velocity and excursion checks is 1200 W for the pair. Passband ripple holds at 0.56 dB across the tuning, with F3 at 38.6 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eNVX logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the NVX mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eThreaded inserts pressed into the baffle on the published 11.730 inch bolt circle, stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 1200 W\u003c\/h4\u003e\n\u003cp\u003eThe 32.6 square inch slot beside the woofer is sized so the\n    channel runs 20.8 metres per second and the mouth 13.5 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 6.25 inches along its wall and turns once along the back wall for another 16.25 inches, which is why a 33.5 Hz tuning fits a 12.25 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eA single NSW12v3 also builds in the Performance Optimized ported wedge and ported down-fire, the smaller and cheaper single-driver boxes. A pair takes this Professional cabinet: one shared chamber on a 2.25 inch three-layer baffle with both woofers flush in the outer layer, and a slot port gated at 1200 W for the pair.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 4.54 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 58 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e40.00\" W x 16.00\" H x 12.25\" D external. A windowed brace runs front to back beside the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our dual 12 inch Professional envelope, built around the NSW12v3's own frame and mounting depth, with both woofers on one face and the port on the left. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003ePort mouth velocity peaks at 13.5 m\/s against the 17 m\/s point where a slot begins to chuff, and 20.8 m\/s in the channel, both measured at the pair's design power. Both drivers must be the same model and the same coil: mixing them puts unequal loads on one shared chamber, and neither driver sees the airspace it was picked for.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 26 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 7.4 mm of its 12.5 mm at 1200 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":47335387725913,"sku":"Pro 12D-P NSW","price":507.99,"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_466d0590-31e3-4b85-b770-dce237c2664c.jpg?v=1790455119"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-nvx-vcw12v3","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | NVX VCW12v3","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Dual NVX VCW12v3\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e0.85 ft3 Net per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e2.05 ft3 Gross\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.67\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eTwo Separate Chambers\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 8.38\/14.20\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eA Pair of NVX VCW12v3 in a Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eThe VCW12v3 is NVX's 12 inch: 1200 watts RMS, 23 mm of one-way excursion on 530 square centimeters of cone, and 6.85 inches of mounting depth. Every figure comes from NVX's owner's manual and product pages for the VCW122v3 and VCW124v3, including the 0.150 cubic foot driver displacement and the bolt circle, so nothing here is estimated. NVX's manual prints two T\/S columns for the 12 inch v3 that cannot both be true; both NVX product pages print the VCW122v3 column's 25 Hz resonance, so that column is used for both coils.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e0.85 cubic feet net per chamber is NVX's own optimal sealed volume on the D2 figures, Fs 25.1 Hz, Qts 0.40 and Vas 42.9 liters: Qtc 0.667, half power at 44.4 Hz. One cabinet serves both coils: the VCW122v3 (D2) reads Qtc 0.667 with half power at 44.4 Hz, and the VCW124v3 (D4) reads Qtc 0.667 at 44.4 Hz. That is NVX's own optimal sealed volume for the VCW12v3. It reads Qtc 0.67 on the D2 and 0.67 on the D4, a little under the 0.707 of a maximally flat alignment, so the rolloff is gentle rather than peaked.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA bonded full-height 3\/4 inch MDF divider splits the cabinet into two sealed chambers of 0.85 cubic feet net each, so every driver sees exactly the airspace printed on this page. Two drivers sharing one volume load each other; the divider removes that, and each chamber carries its own polyfill.\u003c\/p\u003e\n\u003cp\u003eThe cabinet is 32.00 inches wide, 16 tall, 8.38 inches deep at the top and 14.20 at the base. One shared side-mounted terminal cup feeds both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe drivers mount on the vertical trunk-lid-side face and fire rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for a pair of NVX VCW12v3\u003c\/h2\u003e\n\u003cp\u003eHalf power lands at 44.4 Hz anechoic on the D2, before any cabin gain. NVX publishes a driver displacement of 0.150 cubic feet, and it is taken out of the net figure.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers (Per Chamber)\u003c\/h3\u003e\n\u003ctable class=\"df-tier\"\u003e\n\u003ctr\u003e\n\u003cth\u003eDriver (per chamber)\u003c\/th\u003e\n\u003cth\u003eSystem Qtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVCW122v3 dual 2 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 0.667\u003c\/td\u003e\n\u003ctd\u003e41.8 Hz\u003c\/td\u003e\n\u003ctd\u003e44.4 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVCW124v3 dual 4 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 0.667\u003c\/td\u003e\n\u003ctd\u003e41.8 Hz\u003c\/td\u003e\n\u003ctd\u003e44.4 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eThe baffle is cut to 11.18 in, NVX's published cutout, under the 12.64 in frame. The rear panel rakes 20 degrees, so the cavity deepens from 8.38 in at the top to 14.20 in at the base, and the 6.85 in motor clears it with 1.03 in to spare. NVX publishes the 11.63 in bolt circle for the VCW12v3, so the threaded inserts are pressed at the shop and the stainless machine screws are in the box: set the driver in the recess and bolt it down.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWhat the Numbers Rest On\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face, the outer layer machined as a flush recess.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eNVX's Published Parameters\u003c\/h4\u003e\n\u003cp\u003eVCW122v3 (D2): Fs 25.05 Hz, Qts 0.400, Qes 0.434, Qms 5.12, Vas 42.90 L, Sd 530 cm2. VCW124v3 (D4): Fs 25.05 Hz, Qts 0.400, Qes 0.434, Qms 5.12, Vas 42.90 L, Sd 530 cm2.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring a pair of NVX VCW12v3 to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eA pair of VCW122v3 (D2) drivers can land on 0.5 ohm with all four coils in parallel, 2 ohms as series pairs in parallel, or 8 ohms all in series. A pair of VCW124v3 (D4) drivers can land on 1 ohm with all four coils in parallel, 4 ohms as series pairs in parallel, or 16 ohms all in series. Anything under 1 ohm, and many amplifiers at 1 ohm, is outside what the amplifier is built for; series wiring is the safe default. Confirm the final load against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003ePower handling is 1200 watts RMS per driver, 2400 across the pair. Aim for roughly 840 to 1200 watts per driver at the impedance you wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet with the gloss black acrylic baffle insert, one shared pre-wired terminal cup, 12 gauge OFC to both driver positions. Polyfill wall lining installed. Threaded inserts pressed on NVX's published bolt circle, stainless machine screws in the box. 1 year limited warranty. Enclosure only, the drivers are purchased separately. Call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eDual NVX VCW12v3: Cut for the Driver\u003c\/h2\u003e\n\u003cp\u003e0.85 cubic feet net per chamber at Qtc 0.667, F3 44.4 Hz on the D2, cut direct fit and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":47335391232089,"sku":"PO 12D-S W VCW BB","price":369.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":47335391264857,"sku":"PO 12D-S W VCW B","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_W_VCW_Front.jpg?v=1790455731"},{"product_id":"performance-optimized-down-fire-sealed-dual-12-enclosure-nvx-vcw12v3","title":"Performance Optimized Down Fire Sealed Dual 12\" Enclosure | NVX VCW12v3","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 p{font-size:1.1em;font-weight:300;opacity:.93;margin:0 0 22px;color:#d6d3d1}.df-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}.df-badge{background:rgba(184,115,51,.18);border:1px solid #b87333;color:#e8b98d;padding:7px 16px;border-radius:18px;font-size:.8em;font-weight:600}.df-stats{display:flex;flex-wrap:wrap;background:#1c1917}.df-stat{flex:1 1 200px;text-align:center;padding:26px 16px;border-right:1px solid #292524;border-bottom:1px solid #292524}.df-stat .n{display:block;font-size:1.6em;font-weight:800;color:#d99058}.df-stat 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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 Dual 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003eCut and tuned for a pair of NVX VCW12v3\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\"\u003e1.70 cu ft Net Total\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eSeparate Chambers\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eStandoffs Included\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\"\u003e0.85\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net per chamber\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.667\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc, D2 per chamber\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e44.4 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff, anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e11.82 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height, excludes standoffs\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\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.\u003c\/td\u003e\n\u003ctd class=\"on\"\u003eA shared 30 by 15 inch platform, with cabinet height as the variable. This build sits on that platform at 11.82 inches tall, the height that gives each driver its own 0.85 cubic feet.\u003c\/td\u003e\n\u003ctd\u003eCompact per driver footprint.\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\"\u003eThreaded inserts pressed on the published bolt circle, stainless machine screws included.\u003c\/td\u003e\n\u003ctd\u003eThreaded 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, full-height divider and 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\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 driver's own 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 NVX VCW12v3\u003c\/h3\u003e\n\u003cp\u003eNothing about this cabinet is generic. The baffle is cut to 11.18 in, NVX's published cutout, under the 12.64 in frame. The airspace lands on \u003cstrong\u003e0.85 cubic feet net per chamber\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe VCW12v3 is NVX's 12 inch, rated \u003cstrong\u003e1200 watts RMS\u003c\/strong\u003e, with 23 mm of one-way excursion. It is 6.85 inches deep, which matters on a down fire, where the motor rises into the cabinet. Every figure comes from NVX's owner's manual and product pages for the VCW122v3 and VCW124v3, including the 0.150 cubic foot driver displacement and the bolt circle, so nothing here is estimated. NVX's manual prints two T\/S columns for the 12 inch v3 that cannot both be true; both NVX product pages print the VCW122v3 column's 25 Hz resonance, so that column is used for both coils.\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 0.85 cubic feet 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, 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\u003e0.85 cubic feet net per driver\u003c\/strong\u003e, out of 2.06 gross after the divider and the 0.150 cubic foot driver displacement NVX publishes. At 0.85 cubic feet per chamber the VCW12v3 D2 lands at Qtc 0.667 with half power at 44.4 Hz. One cabinet serves both coils: the VCW122v3 (D2) reads Qtc 0.667 with half power at 44.4 Hz, and the VCW124v3 (D4) reads Qtc 0.667 at 44.4 Hz. That is NVX's own optimal sealed volume for the VCW12v3. It reads Qtc 0.67 on the D2 and 0.67 on the D4, a little under the 0.707 of a maximally flat alignment, so the rolloff is gentle rather than peaked.\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 guessed from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003ctable class=\"df-tier\"\u003e\n\u003ctr\u003e\n\u003cth\u003eDriver (per chamber)\u003c\/th\u003e\n\u003cth\u003eSystem Qtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVCW122v3 dual 2 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 0.667\u003c\/td\u003e\n\u003ctd\u003e41.8 Hz\u003c\/td\u003e\n\u003ctd\u003e44.4 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVCW124v3 dual 4 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 0.667\u003c\/td\u003e\n\u003ctd\u003e41.8 Hz\u003c\/td\u003e\n\u003ctd\u003e44.4 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\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\u003cp\u003eThe cabinet measures \u003cstrong\u003e30.00 inches wide by 15.00 inches deep by 11.82 inches tall, measured in the down fire position and excluding standoffs\u003c\/strong\u003e. Plan the space around the installed height rather than the cabinet height: the standoffs hold 1.75 inches under the baffle, so the finished stack sits near \u003cstrong\u003e13.57 inches\u003c\/strong\u003e.\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 to both driver positions. 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\u003eStandoffs Included\u003c\/h4\u003e\n\u003cp\u003eNVX publishes no front clearance figure for the VCW12v3, so this cabinet uses the Proline X standard \u003cstrong\u003e1.75 inch\u003c\/strong\u003e standoff, shipped with every enclosure and left uninstalled so you can place them to suit your floor. At that height the floor slot is 0.75 times the cone area, under the 1.0 we aim for. The 23 mm of excursion on this cone moves a lot of air, so if the floor allows, taller feet or a front-firing install give it more room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eMotor Clearance and Orientation\u003c\/h3\u003e\n\u003cp\u003eThe motors rise off the baffle into the cavity, so on a down fire cabinet the clearance that matters runs to the top panel. The 6.85 inch mounting depth puts the motor 5.35 inches into a 9.57 inch cavity, leaving \u003cstrong\u003e4.22 inches above the motor\u003c\/strong\u003e against a 0.75 inch minimum. Height was set by the airspace, above the minimum the clearance alone would have required.\u003c\/p\u003e\n\u003cp\u003eNVX does not publish a position on down firing this driver, and this cabinet makes no claim on their behalf. The feet ship uninstalled, so if you would rather run it front firing or up firing, that is a decision you can make at install time without changing anything about the enclosure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower, Mounting and Warranty\u003c\/h3\u003e\n\u003cp\u003eNVX rates the VCW12v3 at \u003cstrong\u003e1200 watts RMS\u003c\/strong\u003e, 2400 watts RMS combined. A pair of VCW122v3 (D2) drivers can land on 0.5 ohm with all four coils in parallel, 2 ohms as series pairs in parallel, or 8 ohms all in series. A pair of VCW124v3 (D4) drivers can land on 1 ohm with all four coils in parallel, 4 ohms as series pairs in parallel, or 16 ohms all in series. Anything under 1 ohm, and many amplifiers at 1 ohm, is outside what the amplifier is built for; series wiring is the safe default. Confirm the load against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003eNVX publishes the 11.63 in bolt circle for the VCW12v3, so the threaded inserts are pressed at the shop and the stainless machine screws are in the box: set the driver in the recess and bolt it down. The enclosure carries a 1 year limited warranty. Bring your own pair of VCW12v3; 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\u003eBuilt one at a time in Tullahoma, Tennessee, with standoffs and a 1 year limited warranty. Questions on fitment or amplifier matching, call 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":47335391297625,"sku":"PO 12D-S DF VCW","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_DF_VCW_Front.jpg?v=1790455845"},{"product_id":"performance-optimized-wedge-sealed-dual-12-enclosure-nvx-vsw12v3","title":"Performance Optimized Wedge Sealed Dual 12\" Enclosure | NVX VSW12v3","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Dual NVX VSW12v3\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003eDual 12\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e1.60 ft3 Net per Chamber\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e3.47 ft3 Gross\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.70\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eTwo Separate Chambers\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e32.00\" x 16\" x 14.10\/19.92\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eA Pair of NVX VSW12v3 in a Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eThe VSW12v3 is NVX's 12 inch: 600 watts RMS, 13.5 mm of one-way excursion on 511 square centimeters of cone, and 6.45 inches of mounting depth. Every figure comes from NVX's owner's manual and product pages for the VSW122v3 and VSW124v3, including the 0.090 cubic foot driver displacement and the bolt circle, so nothing here is estimated.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e1.60 cubic feet net per chamber is split between the coils' Butterworth volumes (1.47 for the D2, 1.73 for the D4) on the D2 figures, Fs 36.6 Hz, Qts 0.55 and Vas 26.2 liters: Qtc 0.696, half power at 46.8 Hz. One cabinet serves both coils: the VSW122v3 (D2) reads Qtc 0.696 with half power at 46.8 Hz, and the VSW124v3 (D4) reads Qtc 0.718 at 46.8 Hz. \u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTwo Fully Separate Chambers\u003c\/h2\u003e\n\u003cp\u003eA bonded full-height 3\/4 inch MDF divider splits the cabinet into two sealed chambers of 1.60 cubic feet net each, so every driver sees exactly the airspace printed on this page. Two drivers sharing one volume load each other; the divider removes that, and each chamber carries its own polyfill.\u003c\/p\u003e\n\u003cp\u003eThe cabinet is 32.00 inches wide, 16 tall, 14.10 inches deep at the top and 19.92 at the base. One shared side-mounted terminal cup feeds both driver positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe drivers mount on the vertical trunk-lid-side face and fire rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for a pair of NVX VSW12v3\u003c\/h2\u003e\n\u003cp\u003eHalf power lands at 46.8 Hz anechoic on the D2, before any cabin gain. NVX publishes a driver displacement of 0.090 cubic feet, and it is taken out of the net figure.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers (Per Chamber)\u003c\/h3\u003e\n\u003ctable class=\"df-tier\"\u003e\n\u003ctr\u003e\n\u003cth\u003eDriver (per chamber)\u003c\/th\u003e\n\u003cth\u003eSystem Qtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVSW122v3 dual 2 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 0.696\u003c\/td\u003e\n\u003ctd\u003e46.0 Hz\u003c\/td\u003e\n\u003ctd\u003e46.8 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVSW124v3 dual 4 ohm\u003c\/td\u003e\n\u003ctd\u003eQtc 0.718\u003c\/td\u003e\n\u003ctd\u003e47.5 Hz\u003c\/td\u003e\n\u003ctd\u003e46.8 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eThe baffle is cut to 11.22 in, NVX's published cutout, under the 12.44 in frame. The rear panel rakes 20 degrees, so the cavity deepens from 14.10 in at the top to 19.92 in at the base, and the 6.45 in motor clears it with 7.15 in to spare. NVX publishes the 11.73 in bolt circle for the VSW12v3, so the threaded inserts are pressed at the shop and the stainless machine screws are in the box: set the driver in the recess and bolt it down.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWhat the Numbers Rest On\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and divider seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face, the outer layer machined as a flush recess.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eNVX's Published Parameters\u003c\/h4\u003e\n\u003cp\u003eVSW122v3 (D2): Fs 36.62 Hz, Qts 0.554, Qes 0.622, Qms 5.06, Vas 26.23 L, Sd 511 cm2. VSW124v3 (D4): Fs 37.35 Hz, Qts 0.564, Qes 0.635, Qms 5.05, Vas 28.04 L, Sd 511 cm2.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring a pair of NVX VSW12v3 to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eA pair of VSW122v3 (D2) drivers can land on 0.5 ohm with all four coils in parallel, 2 ohms as series pairs in parallel, or 8 ohms all in series. A pair of VSW124v3 (D4) drivers can land on 1 ohm with all four coils in parallel, 4 ohms as series pairs in parallel, or 16 ohms all in series. Anything under 1 ohm, and many amplifiers at 1 ohm, is outside what the amplifier is built for; series wiring is the safe default. Confirm the final load against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003ePower handling is 600 watts RMS per driver, 1200 across the pair. Aim for roughly 420 to 600 watts per driver at the impedance you wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet with the gloss black acrylic baffle insert, one shared pre-wired terminal cup, 12 gauge OFC to both driver positions. Polyfill wall lining installed. Threaded inserts pressed on NVX's published bolt circle, stainless machine screws in the box. 1 year limited warranty. Enclosure only, the drivers are purchased separately. Call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eDual NVX VSW12v3: Cut for the Driver\u003c\/h2\u003e\n\u003cp\u003e1.60 cubic feet net per chamber at Qtc 0.696, F3 46.8 Hz on the D2, cut direct fit and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":47335392608345,"sku":"PO 12D-S W VSW BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":47335392641113,"sku":"PO 12D-S W VSW B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12D-S_W_VSW_Front.jpg?v=1790455759"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/collections\/12-inch-subwoofer-boxes-9127304_565ff808-04bb-4703-b56f-97beef2135de.jpg?v=1790597997","url":"https:\/\/audiointensity.com\/collections\/dual-12-inch-subwoofer-box.oembed","provider":"Audio Intensity","version":"1.0","type":"link"}