{"product_id":"performance-optimized-down-fire-sealed-12-enclosure-prodigy-nb2-12","title":"Performance Optimized Down Fire Sealed 12\" Enclosure | Prodigy NB2-12","description":"\u003cp\u003eThe \u003cstrong\u003ePerformance Optimized Down Fire Sealed 12\" Enclosure for the Prodigy NB2-12D4\u003c\/strong\u003e is a sealed cabinet built around Prodigy's daily-driver 12 inch subwoofer, and its \u003cstrong\u003e28.37 Hz free-air resonance\u003c\/strong\u003e is unusually low for an entry-level 12.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eProdigy NB2-12D4\u003c\/strong\u003e is a dual 4-ohm subwoofer rated 400 watts RMS and 800 watts peak, with \u003cstrong\u003e14mm of one-way Xmax at 70% BL\u003c\/strong\u003e. A 2.0 inch four-layer copper voice coil, high-roll surround, and a 216 gram moving mass that gives this driver weight and impact rather than pure speed. Mounting depth is 6.75 inches and cutout is 11.20 inches.\u003c\/p\u003e\u003cp\u003eThat 28.37 Hz Fs paired with a \u003cstrong\u003e55.392 liter Vas\u003c\/strong\u003e is the combination that makes this driver work. Both figures are strong for a 400 watt 12, and they are why this cabinet reaches a predicted \u003cstrong\u003eF3 of 43.9 Hz\u003c\/strong\u003e, among the deepest in the Proline X Down Fire line.\u003c\/p\u003e\u003cp\u003eThe 1.25 cubic foot net volume matches Prodigy's own sealed recommendation exactly, producing \u003cstrong\u003eQtc 0.680 with Fc at 42.2 Hz\u003c\/strong\u003e. That is a well-damped alignment sitting just below unity, tight and controlled with low group delay. Unlike many drivers in this program, the NB2-12D4 has a low enough Qts at 0.457 that a genuinely good sealed alignment is reachable.\u003c\/p\u003e\u003cp\u003eWorth noting on fitment: at 6.75 inches this driver is deep, and on most cabinets that would force the volume larger than intended. Here it does not. Prodigy's 1.25 net requires more internal height than the driver's clearance demands, so the volume is set by the acoustics rather than by the motor. That is the right way round.\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.\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 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 Prodigy NB2-12D4. 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":44540541010009,"sku":"PO 12-S DF NB2","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_e45b0e54-ba48-41a8-891c-08e17ef078cb.jpg?v=1787116986","url":"https:\/\/audiointensity.com\/products\/performance-optimized-down-fire-sealed-12-enclosure-prodigy-nb2-12","provider":"Audio Intensity","version":"1.0","type":"link"}