{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-jl-audio-12tw3-d4","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | JL Audio 12TW3-D4","description":"\u003cp\u003eThe \u003cstrong\u003ePerformance Optimized Down Fire Sealed 12\" Enclosure for the JL Audio 12TW3-D4\u003c\/strong\u003e reaches deeper than any other single-driver cabinet in the Proline X Down Fire line, and it does it in a box \u003cstrong\u003e6.4375 inches tall\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eJL Audio 12TW3-D4\u003c\/strong\u003e is a dual 4-ohm subwoofer rated 400 watts RMS and 800 watts peak, with \u003cstrong\u003e15.2mm of one-way linear excursion\u003c\/strong\u003e in a 3.50 inch mounting depth. Mica-injected polypropylene cone, aluminum-alloy heat-dissipating dust cap, rubber surround, cast alloy frame, and a 2.5 inch aluminum voice coil. JL's patented Thin-Line architecture and Concentric Tube Suspension are what make the excursion-to-depth ratio possible.\u003c\/p\u003e\u003cp\u003eThe numbers that matter here are exceptional. \u003cstrong\u003eFs of 26.46 Hz, Qts of 0.531, and 48.73 liters of Vas\u003c\/strong\u003e in a driver that mounts in three and a half inches. That low resonance combined with a genuinely low Qts is rare in this category, and it is why this cabinet produces a \u003cstrong\u003epredicted F3 of 38.0 Hz\u003c\/strong\u003e, the deepest single-driver figure in the entire Down Fire program.\u003c\/p\u003e\u003cp\u003eThe 0.80 cubic foot net volume matches JL Audio's own sealed optimum exactly, producing \u003cstrong\u003eQtc 0.943\u003c\/strong\u003e. That sits just below the textbook maximally flat reference of 0.707: slightly more damped, tighter transient response, low group delay, and a gentle rolloff. It is a genuinely well-behaved alignment rather than a compromise, which separates this driver from most shallows in this program.\u003c\/p\u003e\u003cp\u003eFiring down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz, and in-car response extends well below the anechoic figure. With a 32.6 Hz starting point that is real subterranean output in a vehicle.\u003c\/p\u003e\u003cp\u003eConstruction is the full Proline X Performance Optimized platform: ShopSabre CNC-cut Langboard Elite MDF with \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, perimeter cross-bracing, and a \u003cstrong\u003edouble-layer 1.5 inch front baffle\u003c\/strong\u003e (two 3\/4 inch sheets bonded) with the outer layer machined as a flush recess. Corners are square on Down Fire cabinets. The driver fires down into the floor with the terminal cup \u003cstrong\u003eside mounted\u003c\/strong\u003e. Terminal cup is our Proline X ABS\/carbon fiber composite pre-wired with 12 gauge OFC.\u003c\/p\u003e\u003cp\u003eBring your own JL Audio 12TW3-D4. Dual 4-ohm, so you set your final impedance at the driver: 2 ohms with the coils in parallel, 8 ohms in series.\u003c\/p\u003e\u003cp\u003eManufactured in Tullahoma, Tennessee. 1-year enclosure warranty.\u003c\/p\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540634529881,"sku":"PO 12-S DF TW3","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-dual-15-sealed-enclosure-built-for-resonix-gus-15subwoofer-enclosuresproline-x-9360178_4b767398-1624-4e72-b906-1b39cdebbd57.jpg?v=1787117556","url":"https:\/\/audiointensity.com\/products\/performance-optimized-down-fire-sealed-12-enclosure-jl-audio-12tw3-d4","provider":"Audio Intensity","version":"1.0","type":"link"}