{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-arc-audio-sw12","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Arc Audio SW12","description":"\u003cp\u003eThe \u003cstrong\u003ePerformance Optimized Down Fire Sealed 12\" Enclosure for the Arc Audio SW12\u003c\/strong\u003e puts a full 12 into a cabinet \u003cstrong\u003e6 inches tall\u003c\/strong\u003e on a 30 by 15 inch footprint, built around a driver that mounts in just \u003cstrong\u003e2.4 inches\u003c\/strong\u003e, or 2.23 inches front-loaded. That is the shallowest 12 inch mounting depth in the Proline X Down Fire program.\u003c\/p\u003e\u003cp\u003eThe Arc Audio SW12 is a dual voice coil subwoofer available in \u003cstrong\u003edual 2Ω or dual 4Ω\u003c\/strong\u003e, rated 400 watts RMS and 800 watts peak. Cutout is 11 inches, outer diameter 12.5 inches. Cone area is 532.97 cm² with a 23.955 Tm force factor in series wiring.\u003c\/p\u003e\u003cp\u003eArc publishes full Thiele-Small data in both series and parallel wiring configurations, and the two are effectively identical: Fs 33.1 versus 33.0 Hz, Qts 0.624 versus 0.616, Vas 33.44 versus 33.73 liters. One enclosure serves both wiring choices properly.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003e33.1 Hz free-air resonance\u003c\/strong\u003e is the number that separates this driver from the SW10, which sits at 39.3. Vas is also nearly triple at 33.44 liters against 12.96. That combination is why the 12 reaches meaningfully lower.\u003c\/p\u003e\u003cp\u003eThe 0.806 cubic foot gross volume matches Arc Audio's own optimum sealed recommendation of 0.8 gross, producing \u003cstrong\u003eQtc 1.007, Fc 53.4 Hz, and a predicted F3 of 41.9 Hz\u003c\/strong\u003e. Qts of 0.624 is a healthy, moderate figure, so this driver reaches a usable alignment rather than being forced underdamped the way high-Qts shallows are.\u003c\/p\u003e\u003cp\u003eNote that Arc publishes their sealed recommendations as \u003cstrong\u003egross\u003c\/strong\u003e volume rather than net, which is unusual. Most manufacturers state net. We have built to their gross figure as published. Arc's full range runs 0.65 minimum to 1.0 maximum, all gross.\u003c\/p\u003e\u003cp\u003eFiring down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz. Arc's own documentation notes cabin gain adds roughly 12 dB per octave below 50 Hz in most vehicles.\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) for maximum baffle rigidity and driver isolation. Corners are square on Down Fire cabinets. The driver fires down into the floor with the terminal cup \u003cstrong\u003eside mounted\u003c\/strong\u003e, keeping the connection accessible with the cabinet in place. Terminal cup is our Proline X ABS\/carbon fiber composite pre-wired with 12 gauge OFC.\u003c\/p\u003e\u003cp\u003eBring your own Arc Audio SW12. Dual voice coil, so you set your final impedance at the driver.\u003c\/p\u003e\u003cp\u003eManufactured in Tullahoma, Tennessee. 1-year enclosure warranty.\u003c\/p\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540306980953,"sku":"PO 12-S DF SW12","price":259.99,"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_cd9446ec-d873-40bb-9106-002faf13a4ce.jpg?v=1787107449","url":"https:\/\/audiointensity.com\/products\/performance-optimized-down-fire-sealed-12-enclosure-arc-audio-sw12","provider":"Audio Intensity","version":"1.0","type":"link"}