{"product_id":"performance-optimized-wedge-sealed-8-enclosure-ground-zero-gzhw-20","title":"Performance Optimized Wedge Sealed 8\" Enclosure | Ground Zero GZHW 20","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | Ground Zero GZHW 20\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003e8\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e0.28 ft3 Net\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e0.35 ft3 Gross\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.71\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eSingle Chamber Wedge\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e10.97\" x 11.75\" x 7.79\/12.07\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eThe Ground Zero GZHW 20 in a Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eThe Ground Zero GZHW 20 is rated 700 watts RMS on an 8.270 inch frame with 5.700 inches of mounting depth. The alignment below is computed from Ground Zero's own published Thiele-Small parameters.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e0.28 cubic feet net, the Butterworth volume for this driver computed from Ground Zero's published Fs, Qts and Vas for the D1 coil. In it the GZHW 20 \/ GZHW 20XSPL lands at Qtc 0.707, maximally flat, the reference musical alignment, with system resonance at 50.0 Hz.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e\u003cstrong\u003eThreaded insert kit ships with this box.\u003c\/strong\u003e Ground Zero publishes no mounting hole locations for this driver, so the threaded inserts are not pressed before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, allen-head screws, an allen key and woofer gasket tape. You set them when the woofer goes in.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe driver mounts on the vertical trunk-lid-side face and fires rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the Ground Zero GZHW 20\u003c\/h2\u003e\n\u003cp\u003eHalf power lands at 50.0 Hz anechoic, before any cabin gain. Ground Zero publishes no cone area and no driver displacement for this woofer, and no bolt circle either. The 214.0 square centimetre cone area behind this alignment is estimated from the frame and cutout diameters they do publish, and the displacement is estimated the same way. Both are marked estimated wherever they appear. Ground Zero publishes Fs, Qts, Qes, Qms and Vas, and those figures are theirs.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers\u003c\/h3\u003e\n\u003cp\u003eQtc 0.707 · fc 50.0 Hz · F3 50.0 Hz anechoic\u003c\/p\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eVertical baffle CNC cut to 7.360 in. Mounting depth available is 6.200 in against the 5.700 in the driver needs. The cosmetic recess is cut to Ground Zero's published 8.270 in frame diameter. Ground Zero publishes no mounting hole locations for this driver, so the threaded inserts are not pressed before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, allen-head screws, an allen key and woofer gasket tape. You set them when the woofer goes in.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWhat the Numbers Rest On\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and brace seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eEstimated Cone Area\u003c\/h4\u003e\n\u003cp\u003eGround Zero publishes no cone area and no driver displacement for this woofer, and no bolt circle either. The 214.0 square centimetre cone area behind this alignment is estimated from the frame and cutout diameters they do publish, and the displacement is estimated the same way. Both are marked estimated wherever they appear. Ground Zero publishes Fs, Qts, Qes, Qms and Vas, and those figures are theirs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring the Ground Zero GZHW 20 to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eGround Zero sells the GZHW 20 \/ GZHW 20XSPL in D1 and D2: the D1 is two 1 ohm coils, 2 ohms in series or 0.5 ohm in parallel; the D2 is two 2 ohm coils, 4 ohms in series or 1 ohm in parallel. Ground Zero prints a separate Thiele-Small column for each coil in the owner's manual. This cabinet is solved on the D1 column. In the same 0.28 cubic feet the D2 column lands at Qtc 0.782 with F3 at 48.1 Hz. The cutout, mounting depth and frame are the same for every coil, so it fits either. A parallel load at or under 1 ohm needs an amplifier rated for it.\u003c\/p\u003e\n\u003cp\u003ePower handling is 700 watts RMS. Aim for roughly 489 to 700 watts at the impedance you wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet, pre-wired terminal cup, 12 gauge OFC to the driver position. 1 year limited warranty. Enclosure only, the driver is purchased separately. Call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eGround Zero GZHW 20: Built to a Butterworth Alignment\u003c\/h2\u003e\n\u003cp\u003e0.28 cubic feet net at Qtc 0.707, F3 50.0 Hz, cut direct fit and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44863609929817,"sku":"PO 8-S W GZHW20 BB","price":249.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44863610060889,"sku":"PO 8-S W GZHW20 B","price":229.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_8-S_W_GZHW20_Front.jpg?v=1788980620","url":"https:\/\/audiointensity.com\/products\/performance-optimized-wedge-sealed-8-enclosure-ground-zero-gzhw-20","provider":"Audio Intensity","version":"1.0","type":"link"}