{"product_id":"stereo-integrity-sql-15-series-2-subwoofer","title":"Stereo Integrity SQL 15 Series 2 | 15 Inch Subwoofer","description":"\u003cstyle\u003e\n.si-desc{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#1e293b;max-width:1200px;margin:0 auto;background:#ffffff}\n.si-hero{background:linear-gradient(135deg,#0b0b0c 0%,#2d3139 100%);padding:52px 36px;text-align:center;color:#ffffff}\n.si-hero .si-brand{font-size:.85em;letter-spacing:.3em;text-transform:uppercase;color:#cbd5e1;margin:0 0 10px 0}\n.si-hero .si-title{font-size:2.4em;font-weight:800;letter-spacing:1px;margin:0 0 8px 0;color:#ffffff}\n.si-hero .si-subtitle{font-size:1.15em;font-weight:300;color:#e2e8f0;margin:0 0 22px 0}\n.si-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}\n.si-badge{background:rgba(255,255,255,.08);border:1px solid #9ca3af;color:#f8fafc;padding:7px 18px;border-radius:20px;font-size:.88em;font-weight:600}\n.si-section{padding:44px 36px;border-bottom:1px solid #e2e8f0;background:#ffffff}\n.si-section.si-alt{background:#f5f6f8}\n.si-section h2{color:#111827;font-size:1.8em;font-weight:700;margin:0 0 18px 0;padding-bottom:10px;border-bottom:3px solid #B91C1C}\n.si-section p{font-size:1.04em;color:#334155;margin:0 0 15px 0}\n.si-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:22px 0}\n.si-card{background:#ffffff;border:1px solid #e2e8f0;border-top:4px solid #B91C1C;border-radius:8px;padding:20px}\n.si-card h3{color:#111827;font-size:1.08em;font-weight:700;margin:0 0 8px 0}\n.si-card p{font-size:.97em;color:#475569;margin:0}\n.si-note{background:#f5f6f8;border-left:5px solid #B91C1C;padding:18px 22px;margin:22px 0;border-radius:0 8px 8px 0}\n.si-note p{margin:0;color:#334155}\n.si-link{display:inline-block;background:#B91C1C;color:#ffffff;text-decoration:none;font-weight:700;padding:12px 24px;border-radius:8px;margin:6px 0}\n.si-cta{background:linear-gradient(135deg,#0b0b0c 0%,#2d3139 100%);padding:44px 36px;text-align:center;color:#ffffff}\n.si-cta h2{color:#ffffff;font-size:1.6em;margin:0 0 12px 0}\n.si-cta p{color:#e5e7eb;font-size:1.04em;margin:0 0 8px 0}\n@media (max-width:600px){.si-grid{grid-template-columns:1fr}.si-hero,.si-section,.si-cta{padding:34px 18px}.si-hero .si-title{font-size:1.8em}}\n\u003c\/style\u003e\n\u003cdiv class=\"si-desc\"\u003e\n\u003cdiv class=\"si-hero\"\u003e\n\u003cp class=\"si-brand\"\u003eStereo Integrity\u003c\/p\u003e\n\u003cp class=\"si-title\"\u003eSQL 15 Series 2\u003c\/p\u003e\n\u003cp class=\"si-subtitle\"\u003e15 Inch Sound Quality Loud Subwoofer | Sold Individually\u003c\/p\u003e\n\u003cdiv class=\"si-badges\"\u003e\n\u003cspan class=\"si-badge\"\u003e1000W RMS\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003e2.75 in Copper Voice Coil\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003eDual 2 or Dual 4 Ohm\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003e2 cu ft Sealed\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003ePaper or Carbon Fiber Dust Cap\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section\"\u003e\n\u003ch2\u003eMore Cone, Same SQL Recipe\u003c\/h2\u003e\n\u003cp\u003eThe SQL 15 Series 2 carries the Stereo Integrity SQL formula to a 15 inch cone. It has 127.6 square inches of piston area, compared with 82.51 on the SQL 12, so it moves considerably more air while keeping the motor, coil, and suspension design that defines the series. Stereo Integrity designed the line in Finite Element Analysis software and verified the coil and mass balance on a Klippel system.\u003c\/p\u003e\n\u003cp\u003eLike the rest of the SQL series, it is built to lay down an accurate sound quality foundation and still hit hard when a track demands it. Stereo Integrity recommends 2 cubic feet sealed or 4.25 cubic feet ported.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section si-alt\"\u003e\n\u003ch2\u003eInside the SQL 15\u003c\/h2\u003e\n\u003cdiv class=\"si-grid\"\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003eOverhung SGLC Motor\u003c\/h3\u003e\n\u003cp\u003eThe SQL 15 uses the series SGLC overhung motor with a 2.75 inch solid copper voice coil on a split, black anodized aluminum former. A solid aluminum Faraday ring inside the Y35 ferrite structure reduces inductance so transients stay quick.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003eBalanced Coil Size\u003c\/h3\u003e\n\u003cp\u003eAt 2.75 inches the coil sits between the usual 2.5 and 3 inch sizes, keeping inductance below a 3 inch coil while making more motor force than a 2.5 inch coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003eDual Nomex Spiders\u003c\/h3\u003e\n\u003cp\u003eTwo 8 3\/8 inch Nomex spiders give an even compliance curve through the linear stroke and stiffen near the limit to handle extra excursion. Mirrored, stitched-on flat lead wires keep the coil from rocking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003eTreated Paper Cone\u003c\/h3\u003e\n\u003cp\u003eThe naturally dried, treated paper cone and tall roll rubber surround are matched to the spiders so the suspension stays balanced as excursion climbs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section\"\u003e\n\u003ch2\u003eEnclosure and Power\u003c\/h2\u003e\n\u003cp\u003eStereo Integrity rates the SQL 15 at 1000 watts RMS. Its sealed recommendation is 2 cubic feet, and its ported recommendation is 4.25 cubic feet tuned to 22 Hz with 20 square inches of port area. The driver displaces 0.16 cubic feet.\u003c\/p\u003e\n\u003cdiv class=\"si-note\"\u003e\u003cp\u003e\u003cstrong\u003eBuilt for this driver:\u003c\/strong\u003e Proline X builds Performance Optimized sealed wedge enclosures for the SQL-15 in single and dual configurations, plus a ported wedge, at our shop in Tennessee.\u003c\/p\u003e\u003c\/div\u003e\n\u003ca class=\"si-link\" href=\"\/collections\/stereo-integrity-subwoofer-box\"\u003eShop Proline X Enclosures for Stereo Integrity\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section si-alt\"\u003e\n\u003ch2\u003eChoosing Your Version\u003c\/h2\u003e\n\u003cp\u003eDual 2 ohm coils wire to 1 ohm in parallel or 4 ohms in series, and dual 4 ohm coils wire to 2 ohms in parallel or 8 ohms in series, so choose the version that matches the load your amplifier wants.\u003c\/p\u003e\n\u003cp\u003ePaper and carbon fiber dust caps are both available. Stereo Integrity publishes one specification set for the SQL 15 and does not list separate figures for either dust cap or impedance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section\"\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cdiv class=\"si-note\"\u003e\u003cp\u003e\u003cstrong\u003eCutout:\u003c\/strong\u003e 14.17 in. \u003cstrong\u003eOuter diameter:\u003c\/strong\u003e 15.55 in. \u003cstrong\u003eMounting depth:\u003c\/strong\u003e 7.4 in. \u003cstrong\u003eDisplacement:\u003c\/strong\u003e 0.16 cu ft. Stereo Integrity lists 1.25 in from the baffle to the top of the surround.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-cta\"\u003e\n\u003ch2\u003eAuthorized Stereo Integrity Dealer\u003c\/h2\u003e\n\u003cp\u003eAudio Intensity is an authorized Stereo Integrity dealer, and we build enclosures around their drivers.\u003c\/p\u003e\n\u003cp\u003eCall 931-563-5151 and we will help you match the SQL 15 to the right enclosure, amplifier, and install.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Stereo Integrity","offers":[{"title":"Dual 2 Ohm \/ Paper","offer_id":44924040216665,"sku":"SI-SQL15-D2-PAPER","price":475.99,"currency_code":"USD","in_stock":false},{"title":"Dual 2 Ohm \/ Carbon Fiber","offer_id":44924040249433,"sku":"SI-SQL15-D2-CARBON","price":555.99,"currency_code":"USD","in_stock":false},{"title":"Dual 4 Ohm \/ Paper","offer_id":44924040282201,"sku":"SI-SQL15-D4-PAPER","price":475.99,"currency_code":"USD","in_stock":false},{"title":"Dual 4 Ohm \/ Carbon Fiber","offer_id":44924040314969,"sku":"SI-SQL15-D4-CARBON","price":555.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/stereo-integrity-sql-15-subwoofer-front.jpg?v=1789576014","url":"https:\/\/audiointensity.com\/products\/stereo-integrity-sql-15-series-2-subwoofer","provider":"Audio Intensity","version":"1.0","type":"link"}