{"product_id":"performance-optimized-down-fire-wide-sealed-10-enclosure-powerbass-xl-1040t","title":"Performance Optimized Down Fire Wide Sealed 10\" Enclosure | PowerBass XL-1040T","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 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class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Down Fire Wide 10\" Sealed\u003c\/h2\u003e\n\u003cp\u003eUnder rear seat fitment for trucks and SUVs. Cut for the PowerBass XL-1040T\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\"\u003e12\" Shallow Depth\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\"\u003e0.546\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.748\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\"\u003e51.0 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\"\u003e4.9375 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\u003eThe Down Fire Wide Format\u003c\/h3\u003e\n\u003cp\u003eDown Fire Wide is the Performance Optimized answer to a specific problem: the space under the rear seat of a truck or SUV, or a narrow cargo floor, is \u003cstrong\u003elong and shallow\u003c\/strong\u003e, and a 21.05 by 15 inch Down Fire cabinet will not go in it.\u003c\/p\u003e\n\u003cp\u003eSo the cabinet is turned sideways. This one runs \u003cstrong\u003e41 inches wide by 12 inches deep by 4.9375 inches tall\u003c\/strong\u003e. It is the same XL-1040T, in a cabinet 3 inches shallower front to back than our standard 21.05 by 15 inch XL-1040T cabinet and about 20 inches longer. The airspace given up in depth is recovered along the length, so the driver still gets a properly sized chamber rather than a compromised one.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eWhich one to choose.\u003c\/strong\u003e If you have 15 inches of depth, the standard 21.05 by 15 inch cabinet is the pick: it is shorter end to end and stands 4.9 inches tall. If depth stops at 12 inches and you have 41 inches of run, this is the cabinet that fits. Measure the depth first. Under seat spaces vary widely between cab configurations, and depth is almost always the limiting dimension.\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, 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 cutout, the cabinet height and the airspace all come from the PowerBass XL-1040T'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 PowerBass XL-1040T\u003c\/h3\u003e\n\u003cp\u003eThe baffle is bored to the XL-1040T's \u003cstrong\u003e237 mm cutout\u003c\/strong\u003e. This is a shallow mount driver: \u003cstrong\u003e3.4 inch mounting depth\u003c\/strong\u003e, 7.5 mm of one-way excursion on a 2 in voice coil, 350 watts RMS and 700 peak, rated 35 Hz to 500 Hz.\u003c\/p\u003e\n\u003cp\u003ePowerBass names 0.30 cubic feet as the optimum sealed volume and lists a 0.25 to 0.75 cubic foot 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\u003eNet Volume, Not Gross\u003c\/h3\u003e\n\u003cp\u003eWe build this cabinet at \u003cstrong\u003e0.546 cubic feet net\u003c\/strong\u003e: true internal airspace after panel thickness, the brace and the driver's own 0.0771 cubic feet of displacement are accounted for. Gross is 0.629 cubic feet.\u003c\/p\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eWorth knowing when you compare figures.\u003c\/strong\u003e PowerBass quotes its 0.30 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.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eHeight on this cabinet is set by the driver's mounting depth, not by a volume target. The 3.4 inch driver reaches 1.9 inches past the inner baffle into the cabinet, and we hold 0.75 inch of clearance above the motor. That fixes the cabinet at 4.9375 inches tall, and on a 41 by 12 footprint that height holds \u003cstrong\u003e0.546 cubic feet net\u003c\/strong\u003e, more than the 0.30 cubic feet the standard cabinet was built to. More air in a sealed box lowers Qtc, which is the safe direction: slightly more damping and a gentler approach to the rolloff.\u003c\/p\u003e\n\u003cp\u003eThat is still inside the 0.25 to 0.75 cubic foot range PowerBass lists as acceptable. Calculated from PowerBass's own published Thiele-Small parameters, Fs 35 Hz, Qts 0.487 and Vas 21.02 litres, the cabinet gives \u003cstrong\u003eQtc 0.748, Fc 53.8 Hz, F3 51.0 Hz\u003c\/strong\u003e anechoic, a looser and better damped alignment than the tight 0.30 box, with cabin gain adding real output below 50 Hz in a car.\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 12 inches deep by 4.9375 inches tall, measured in the down fire position and excluding standoffs\u003c\/strong\u003e. The 1.75 inch standoffs ship uninstalled so you can place them to suit your floor; installed, the finished stack is \u003cstrong\u003e6.6875 inches\u003c\/strong\u003e. Plan the space around that figure, not the cabinet height.\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, with the outer layer machined as a flush recess so the driver bolts to the inner layer. The driver lands on \u003cstrong\u003e8\/32 threaded inserts\u003c\/strong\u003e, with stainless machine screws included. The XL-1040T's 10.709 inch frame sits on the 12 inch deep baffle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWindowed U-Brace\u003c\/h4\u003e\n\u003cp\u003eA \u003cstrong\u003ewindowed U-brace\u003c\/strong\u003e dadoed to the shell ties the front and rear walls together across the 41 inch span, and 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\u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eStandoffs Included\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003e1.75 inch\u003c\/strong\u003e standoffs ship with the enclosure, uninstalled. Mount them for a down fire install, or leave them off and run the cabinet front firing or up firing.\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 0.79 inches above the motor at 2.6875 inches of internal height, against our 0.75 inch minimum. 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\u003c!-- ENCLOSURE PERFORMANCE SLOT --\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower and Wiring\u003c\/h3\u003e\n\u003cp\u003eThe XL-1040T is a single 4 ohm voice coil, so it presents 4 ohms and there is no wiring decision to make. Target 350 watts RMS.\u003c\/p\u003e\n\u003cp\u003eBring your own XL-1040T; the driver is purchased separately. We do not stock PowerBass drivers. 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\u003eDown Fire Wide, built for the space under a rear bench, 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":47345080860761,"sku":"PO 10-S DFW XLT","price":289.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10_S_DFW_XLT_Front.jpg?v=1790642897","url":"https:\/\/audiointensity.com\/products\/performance-optimized-down-fire-wide-sealed-10-enclosure-powerbass-xl-1040t","provider":"Audio Intensity","version":"1.0","type":"link"}