{"product_id":"performance-optimized-down-fire-wide-sealed-12-enclosure-prodigy-nb2-12","title":"Performance Optimized Down Fire Wide Sealed 12\" Enclosure | Prodigy NB2-12","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#5c3317 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 12px;color:#fff}.df-hero 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 12\" Sealed\u003c\/h2\u003e\n\u003cp\u003e41 inch wide, 14 inch deep format. Cut for the Prodigy NB2-12D4\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\"\u003e1.532\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e0.690\u003c\/span\u003e\u003cspan class=\"l\"\u003esystem Qtc\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e43.9 Hz\u003c\/span\u003e\u003cspan class=\"l\"\u003eF3 rolloff\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e8.25 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 8.25 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 NB2-12's 12.5 inch frame sits on the 14 inch deep baffle with about 0.75 inch of baffle outside the flange fore and aft. 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\u003e8.25 inches\u003c\/strong\u003e against \u003cstrong\u003e8.6875 inches\u003c\/strong\u003e for the standard 30 by 15 NB2-12 cabinet.\u003c\/p\u003e\n\u003cdiv class=\"df-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eHeight here is set by the driver, not the airspace.\u003c\/strong\u003e The NB2-12 mounts 6.75 inches deep, and the motor needs 0.75 inch of clear air above it inside the cabinet. That clearance fixes the height at 8.25 inches, and on a 41 by 14 footprint that height holds \u003cstrong\u003e1.532 cubic feet net\u003c\/strong\u003e, more than the 1.25 the standard box was built to. More air lowers Qtc, which is the safe direction.\u003c\/p\u003e\u003c\/div\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 Prodigy NB2-12D4'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 Prodigy NB2-12D4\u003c\/h3\u003e\n\u003cp\u003eThe baffle is bored to the NB2-12D4's \u003cstrong\u003e11.2 inch cutout\u003c\/strong\u003e, and the cabinet height is set by its \u003cstrong\u003e6.75 inch mounting depth\u003c\/strong\u003e. That is a deep driver, and an 11.2 inch bore through a double baffle is the reason the outer layer is machined as a flush recess rather than cut straight through.\u003c\/p\u003e\n\u003cp\u003eThe driver is a dual 4-ohm twelve rated \u003cstrong\u003e400 watts RMS and 800 watts peak\u003c\/strong\u003e, with \u003cstrong\u003e14mm of one-way Xmax at 70% BL\u003c\/strong\u003e. A 2.0 inch four-layer copper voice coil, a high-roll surround, a vented pole piece with radial backplate vents, and a \u003cstrong\u003e216 gram moving mass\u003c\/strong\u003e. That mass is the character of this driver: weight and impact rather than pure speed.\u003c\/p\u003e\n\u003cp\u003eThe numbers that make it work sealed are the free-air resonance and the compliance. \u003cstrong\u003eFs is 28.37 Hz\u003c\/strong\u003e against a \u003cstrong\u003eVas of 55.392 liters\u003c\/strong\u003e, and Qts is 0.457. A sealed enclosure always raises the system corner above the driver's Fs, so a low starting point is what lets a sealed twelve reach deep. Rest of the published set: Qes 0.522, Qms 3.662, Mms 216.268 g, BL 21.268, Re 6.2 ohms, sensitivity 85.4 dB.\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\u003e1.532 cubic feet net\u003c\/strong\u003e from 1.671 gross, after the internal brace and Prodigy's published 0.13 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 0.690 with Fc at 42.8 Hz and a predicted F3 of 43.9 Hz\u003c\/strong\u003e, computed from Prodigy's published Fs 28.37 Hz, Qts 0.457 and Vas 55.392 liters.\u003c\/p\u003e\n\u003cp\u003eQtc 0.690 sits just under the textbook 0.707 maximally flat reference: a well damped alignment with tight control and low group delay. Prodigy's own recommendation for this driver is 1.25 net, which is what the standard 30 by 15 box holds; the wide box carries more because the motor, not the airspace, sets its height.\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 8.25 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\u003e10 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 11.2 inch cutout sits centred on the 14 inch deep baffle, leaving about 0.75 inch of baffle outside the flange fore and aft. 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\u003eProdigy rates the NB2-12D4 at \u003cstrong\u003e400 watts RMS and 800 watts peak\u003c\/strong\u003e. Set gains for 300 to 400 watts RMS. The coils are dual 4-ohm, so final impedance is set at the driver: 2 ohms with the coils in parallel, 8 ohms in series. Confirm your amplifier is stable at the load you choose before powering the system.\u003c\/p\u003e\n\u003cp\u003eBring your own Prodigy NB2-12D4; 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":47345340317785,"sku":"PO 12-S DFW NB2","price":319.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12_S_DFW_NB2_Front.jpg?v=1790650570","url":"https:\/\/audiointensity.com\/products\/performance-optimized-down-fire-wide-sealed-12-enclosure-prodigy-nb2-12","provider":"Audio Intensity","version":"1.0","type":"link"}