{"product_id":"performance-optimized-wedge-ported-dual-10-enclosure-ground-zero-gzrw-250-d2-flat","title":"Performance Optimized Wedge Ported Dual 10\" Enclosure | Ground Zero GZRW 250-D2 FLAT","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%,#001a91 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(91,120,255,.18);border:1px solid #5b78ff;color:#99abff;padding:7px 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td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\u003cdiv class=\"df-hero\"\u003e\n\u003ch2\u003eProline X Performance Optimized Wedge Dual 10\" Ported\u003c\/h2\u003e\n\u003cp\u003eTwo GZRW 250-D2 FLATs vented at 32.5 Hz in one trunk wedge, 1.63 cubic feet and a 34.1 Hz F3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stats\"\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.63\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net shared\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.1\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e21.4\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eWhy this pair is vented at 32.5 Hz\u003c\/h3\u003e\n\u003cp\u003eThis cabinet gives the pair 1.63 cubic feet in one shared chamber, 0.82 per driver, vented at 32.5 Hz through a 21.4 square inch triangular port, and reaches 34.1 Hz anechoic. Ground Zero's own vented recommendation for one GZRW 250-D2 FLAT is 0.71 cubic feet net with a single 7 cm round port, F3 37 Hz; each driver gets a little more air than that here, in a 32 by 15 inch dual wedge, with a far larger port. The port runs 20.6 m\/s in the channel and 13.2 at the flared mouth with both drivers at 400 watts, and each cone peaks at 7.5 of its 22 mm. Passband ripple is 2.2 dB. Our sealed dual wedge (PO 10D-S W GZRW250F) holds 1.00 cubic feet per chamber at Qtc 0.81 with half power at 37 Hz; this ported box reaches deeper.\u003c\/p\u003e\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003eGround Zero's GZRW 250-D2 FLAT table holds together on Qts and on its motor figures, but prints no cone area: the 350 square centimeters used here is derived from their Vas, Fs and moving mass. Displacement is our 0.038 cubic foot estimate per driver, and tuning carries a 1.5 Hz fold loss that is an estimate, not a bench measurement.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eTwo drivers, one chamber, one port\u003c\/h3\u003e\n\u003cp\u003eA ported dual shares its air: one chamber and one port tuned for the pair, so the two cones load the same volume and the port carries both. That is the opposite of our sealed duals, which split the chambers. Windowed braces stiffen the 32 inch panels; their windows keep the cavity one chamber and leave each motor clear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n\u003cp\u003eThe cabinet is 32.00 inches wide and 15 tall, 9.50 inches deep at the top and 14.96 at the base. The back rakes 20 degrees to sit against the rear seat; the baffle stays vertical, so the drivers fire rearward into the trunk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eThe port is the product\u003c\/h3\u003e\n\u003cp\u003eThe port is a triangular slot formed by the floor, the back panel and one bevelled panel seated in dados, running 25.9 inches along the back and exiting through the side with a 0.5 inch roundover on all three edges of the mouth. Its 21.4 square inches carry both drivers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n\u003cp\u003eBelow tuning the port stops loading the cones and excursion climbs fast. Set a subsonic filter near 26 Hz and leave it there.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n\u003cp\u003eBoth baffle openings are CNC cut to 9.13 in under 10.87 in recesses, centred 8.625 and 23.375 in from the mouth-side edge. The 3.35 in motors clear the port panel with 3.84 in to spare. Ground Zero prints no bolt circle, so the baffle ships undrilled with a threaded insert kit and stainless machine screws: set each driver in its recess, mark its holes, drill and press the inserts. Cut from Langboard Elite 3\/4 inch MDF with V-groove and dado joinery and a 1.5 inch double baffle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"df-section\"\u003e\n\u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n\u003cp\u003eGround Zero rates the GZRW 250-D2 FLAT at 400 watts RMS per driver, 800 across the pair; aim for 280 to 400 per driver. Each GZRW 250-D2 FLAT has two 2 ohm coils: a pair lands on 2 ohms with each woofer's coils in series and the two woofers in parallel, or 8 ohms all in series. 0.5 ohm, everything in parallel, is outside what most amplifiers are built for. It ships dry: do not add polyfill to a ported box. 1 year limited warranty. Enclosure only, the drivers are purchased separately. Call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":47424333217881,"sku":"PO 10D-P W GZRW250F BB","price":489.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":47424333250649,"sku":"PO 10D-P W GZRW250F B","price":469.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10D-P_W_GZRW250F_Front.jpg?v=1791678610","url":"https:\/\/audiointensity.com\/products\/performance-optimized-wedge-ported-dual-10-enclosure-ground-zero-gzrw-250-d2-flat","provider":"Audio Intensity","version":"1.0","type":"link"}