{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-diamond-audio-dmd-sh","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Diamond Audio DMD-SH","description":"\u003cp\u003eThe \u003cstrong\u003ePerformance Optimized Down Fire Sealed 10\" Enclosure for the Diamond Audio DMD-SH\u003c\/strong\u003e is a low-profile sealed cabinet built around Diamond's shallow-mount DMD 10\" subwoofer. At 6.125 inches tall on a 30 by 15 inch footprint, it fits under seats and in cargo wells that will not take a conventional box.\u003c\/p\u003e\u003cp\u003eThe DMD-SH 10 is available as the \u003cstrong\u003eDMD102SH\u003c\/strong\u003e (dual 2Ω) or \u003cstrong\u003eDMD104SH\u003c\/strong\u003e (dual 4Ω), both rated 250 watts RMS and 500 watts max with a \u003cstrong\u003e3.00 inch mounting depth\u003c\/strong\u003e. Cutout is 9.13 inches, total diameter 10.87 inches. The driver features an aluminum heatsink dust cap over a high-strength paper cone, die-cast shallow frame, vented pole for cooler operation, oversized push terminals, black spider with woven tinsel leads, and a wrap-around ABS mounting gasket. Diamond states the motor and suspension symmetry are \u003cstrong\u003eKlippel optimized\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe two coil variants differ more than usual on this driver. The DMD102SH runs a Qts of 0.66 with 13.7 T of motor force and 7.9mm Xmax. The DMD104SH runs a Qts of 0.77 with 16.4 T and 8.8mm Xmax. The D4 has the stronger motor and more excursion, the D2 the better damping.\u003c\/p\u003e\u003cp\u003eThe 0.80 cubic foot net volume produces \u003cstrong\u003eQtc 0.856 with F3 at 53.2 Hz on the DMD102SH\u003c\/strong\u003e, and \u003cstrong\u003eQtc 0.981 with F3 at 52.4 Hz on the DMD104SH\u003c\/strong\u003e, computed from Diamond's published Thiele-Small parameters.\u003c\/p\u003e\u003cp\u003eTwo things worth stating plainly. First, we build this larger than Diamond's suggested 0.45 cubic feet. Their own recommendation puts the D2 at roughly Qtc 0.98 and the D4 near 1.14, both underdamped. At 0.80 net you get meaningfully better damping and 2 to 3 Hz more extension, and Diamond's manual presents their enclosure table as a suggestion rather than a specification.\u003c\/p\u003e\u003cp\u003eSecond, the figures above are \u003cstrong\u003ecomputed from the T\/S parameters Diamond publishes\u003c\/strong\u003e, and they do not match the Qtc values printed in Diamond's enclosure table. Running their own Qts and Vas through standard sealed box math produces higher Qtc than their table shows, by roughly 0.2 across every variant. We publish the computed number because it follows from the driver data.\u003c\/p\u003e\u003cp\u003eThese are high-resonance drivers at 48 Hz free-air, so F3 lands in the low 50s. Firing 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 (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 DMD102SH or DMD104SH. Both are 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":44540389752921,"sku":"PO 10-S DF DMD","price":229.99,"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_b25bcf2a-8ef4-40bf-8537-7e0e54cf8b7c.jpg?v=1787112325","url":"https:\/\/audiointensity.com\/products\/performance-optimized-down-fire-sealed-10-enclosure-diamond-audio-dmd-sh","provider":"Audio Intensity","version":"1.0","type":"link"}