{"product_id":"performance-optimized-down-fire-wide-sealed-12-enclosure-rockford-fosgate-t1-slim","title":"Performance Optimized Down Fire Wide Sealed 12\" Enclosure | Rockford Fosgate T1 Slim","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 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 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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 Wide 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003e41 inch wide, 14 inch deep format. Cut for the Rockford Fosgate T1 Slim 12\u003c\/p\u003e\n\u003cdiv class=\"df-badges\"\u003e\n\u003cspan class=\"df-badge\"\u003eDown Fire Wide\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eV-Groove and Dado\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003e14\" Deep\u003c\/span\u003e\u003cspan class=\"df-badge\"\u003eWindowed U-Brace\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\"\u003e1.255\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.466\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.9 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e6.9375 in\u003c\/span\u003e\u003cspan class=\"l\"\u003ecabinet height, excludes feet\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eThe Down Fire Wide Format\u003c\/h3\u003e\n\u003cp\u003eDown Fire Wide is the Performance Optimized answer to a space that is long rather than deep or tall. This cabinet runs \u003cstrong\u003e41 inches wide by 14 inches deep by 6.9375 inches tall\u003c\/strong\u003e: 1 inch shallower front to back than our standard 30 by 15 inch Down Fire platform, and 11 inches longer.\u003c\/p\u003e\n\u003cp\u003eFourteen inches is the practical minimum for a 12 inch driver: a 12 inch frame needs about 13 inches of baffle. The T1 Slim 12's frame sits on the 14 inch deep baffle. Because the airspace is spread along 41 inches instead of 30, the wide cabinet usually stands lower than the standard box, and it does here: \u003cstrong\u003e6.9375 inches\u003c\/strong\u003e against \u003cstrong\u003e8.25 inches\u003c\/strong\u003e for the standard 30 by 15 T1 Slim 12 cabinet.\u003c\/p\u003e\n\u003cp\u003eWith the footprint fixed at 41 by 14, height is the free dimension, and it was solved to the airspace: \u003cstrong\u003e1.255 cubic feet net\u003c\/strong\u003e, against 1.24 in the standard box. The motor clears the top panel with 3.16 inches to spare, so clearance did not set the height.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eWhich one to choose.\u003c\/strong\u003e The standard 30 by 15 is the pick when length is limited. This one is the pick when height or depth is the limit and you have 41 inches of run: under or behind a rear bench, or along a cargo wall. Measure depth and height first; depth is usually the dimension that decides it.\u003c\/p\u003e\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. Down Fire Wide variants like this one run long and shallow for under seat fitment.\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 layer, outer layer machined as a flush recess. 1.5 inch.\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, windowed internal 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 cutout, the mounting depth and the chamber volume all come from the Rockford Fosgate T1 Slim 12'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 the Rockford Fosgate T1 Slim 12\u003c\/h3\u003e\n\u003cp\u003eThe baffle is bored to the T1 Slim 12's \u003cstrong\u003e11.22 inch cutout\u003c\/strong\u003e, and its \u003cstrong\u003e3.03 inch mounting depth\u003c\/strong\u003e leaves the motor well clear of the top panel.\u003c\/p\u003e\n\u003cp\u003eThe T1 Slim 12 ships as the T1S1-12 (1 ohm single voice coil) or the T1S2-12 (2 ohm single voice coil), both rated 600 watts RMS with 15mm of one-way Xmax. Rockford kept a full 3 inch four-layer voice coil on it, which is unusual for a shallow this thin, behind an anodized aluminum cone with VAST surface technology and an integrated trim ring. Both models share the same cutout, depth and 0.042 cubic foot displacement, so this cabinet is direct fit for either impedance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e1.255 cubic feet net\u003c\/strong\u003e from 1.305 gross, after the internal brace and the driver's 0.042 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 displacement, not estimated from external dimensions minus wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eThat produces \u003cstrong\u003eQtc 1.466 with Fc at 51.2 Hz and a predicted F3 of 35.9 Hz\u003c\/strong\u003e, computed from the T1S1-12 parameter set (Fs 37 Hz, Qts 1.06, Vas 32.4 liters), which Rockford states the T1S2-12 shares.\u003c\/p\u003e\n\u003cp\u003eThis is a high-Q alignment, and it deserves an honest explanation. Free-air Qts on the T1 Slim 12 is 1.06, and system Qtc can never fall below Qts, not in a larger box and not on an infinite baffle. Qts already exceeds 0.707, so no sealed box of any size reaches a maximally flat alignment with this driver. Every sealed box built for it is underdamped and carries a response peak near the corner frequency.\u003c\/p\u003e\n\u003cp\u003eThat is Rockford's design intent rather than a defect: the peak is what makes a shallow driver in a thin cabinet hit like something larger, and in a vehicle it sits where cabin gain is already climbing.\u003c\/p\u003e\n\u003cp\u003eThese figures are anechoic. Firing down into the floor, the sealed rolloff meets rising cabin gain below about 60 Hz, so in-car response extends below the published F3.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eDown Fire Wide Construction\u003c\/h3\u003e\n\u003cp\u003eCut with V-groove and dado joinery on our ShopSabre routers from Langboard Elite 3\/4 inch MDF, a dense 48.5 lb\/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Every panel joint is a machined interlocking groove that mechanically locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. Corners are square on Down Fire cabinets.\u003c\/p\u003e\n\u003cp\u003eThe cabinet measures \u003cstrong\u003e41 inches wide by 14 inches deep by 6.9375 inches tall, measured in the down fire position\u003c\/strong\u003e, excluding the feet. The 1.75 inch standoffs ship with the enclosure but are not installed, so the installed height is \u003cstrong\u003e8.6875 inches\u003c\/strong\u003e. Plan the space around that figure.\u003c\/p\u003e\n\u003cdiv class=\"df-grid\"\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e1.5 Inch Double Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo \u003cstrong\u003e3\/4 inch layers laminated to 1.5 inches\u003c\/strong\u003e, the outer layer machined as a flush recess so the driver bolts to the inner layer, with 8\/32 threaded inserts at the driver position, stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eRound Frame, 14 Inch Baffle\u003c\/h4\u003e\n\u003cp\u003eThe 11.22 inch cutout sits centred on the 14 inch deep baffle. No rotation or special layout is needed for a round frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWindowed U-Brace\u003c\/h4\u003e\n\u003cp\u003eA windowed U-brace dadoed into the shell stiffens the long 41 inch panels without walling off the airspace. Polyfill is installed as a light wall lining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSide-Mounted Terminal Cup\u003c\/h4\u003e\n\u003cp\u003eProline X ABS and carbon fiber composite cup with stainless hardware and copper ring terminals, pre-wired in \u003cstrong\u003e12 gauge OFC\u003c\/strong\u003e. Side mounted so it stays accessible with the baffle facing the floor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Wiring\u003c\/h3\u003e\n\u003cp\u003eRockford rates both T1 Slim 12 models at \u003cstrong\u003e600 watts RMS\u003c\/strong\u003e continuous. Target 450 to 600 watts RMS. Both models are single voice coil, so there is no series or parallel decision at the driver: confirm your amplifier is stable at 1 ohm for the T1S1-12 or 2 ohms for the T1S2-12 before powering the system.\u003c\/p\u003e\n\u003cp\u003eBring your own T1S1-12 or T1S2-12; the driver is purchased separately. The enclosure carries a 1 year limited warranty.\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\u003eWe cut every Down Fire Wide cabinet to one driver's published cutout, mounting depth and airspace, then build it one at a time in Tullahoma, Tennessee. 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":47345341038681,"sku":"PO 12-S DFW T1","price":319.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12_S_DFW_T1_Front.jpg?v=1790650626","url":"https:\/\/audiointensity.com\/products\/performance-optimized-down-fire-wide-sealed-12-enclosure-rockford-fosgate-t1-slim","provider":"Audio Intensity","version":"1.0","type":"link"}