{"product_id":"stereo-integrity-sql-12-series-2-subwoofer","title":"Stereo Integrity SQL 12 Series 2 | 12 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 12 Series 2\u003c\/p\u003e\n\u003cp class=\"si-subtitle\"\u003e12 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\"\u003ePaper or Carbon Fiber Dust Cap\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003eKlippel Tested\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section\"\u003e\n\u003ch2\u003eSound Quality Loud\u003c\/h2\u003e\n\u003cp\u003eThe SQL 12 Series 2 is the 12 inch model in the Stereo Integrity SQL line, and the name is the design brief: Sound Quality Loud. Stereo Integrity developed it in Finite Element Analysis software and refined the coil and mass balance through several rounds of Klippel testing. The goal is a clean, accurate foundation for a sound quality system that can still deliver serious output when the music calls for it.\u003c\/p\u003e\n\u003cp\u003eStereo Integrity describes the SQL series as its best performance for the money. The SQL 12 works in a very small sealed enclosure or a small to medium ported enclosure, which makes it easy to fit into a daily driver without giving up the low end.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section si-alt\"\u003e\n\u003ch2\u003eInside the SQL 12\u003c\/h2\u003e\n\u003cdiv class=\"si-grid\"\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003eSGLC Overhung Motor\u003c\/h3\u003e\n\u003cp\u003eA 2.75 inch solid copper voice coil is wound on a split, black anodized aluminum former with a 50 mm winding height. A solid aluminum Faraday ring nested in the Y35 ferrite motor lowers inductance for quicker transient response.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003eWhy a 2.75 Inch Coil\u003c\/h3\u003e\n\u003cp\u003eStereo Integrity picked 2.75 inches as the balance point between common coil sizes. It carries less inductance than a 3 inch coil and 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\u003eLarge 8 3\/8 inch dual Nomex spiders keep compliance uniform across the linear stroke and firm up near the excursion limit. Flat woven lead wires are stitched to the spider in a mirrored layout to prevent coil rocking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003ePaper Cone, Tall Rubber Surround\u003c\/h3\u003e\n\u003cp\u003eA naturally dried, treated paper cone brings the mass that suits low frequency reproduction, and the tall roll rubber surround is matched to the spiders for a balanced suspension.\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 12 at 1000 watts RMS. For a sealed build it recommends 0.65 to 1.0 cubic feet. For a ported build it recommends 1.7 cubic feet tuned to 27 Hz with 22 square inches of port area. The driver displaces 0.15 cubic feet, so account for it when you calculate net volume.\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, sealed wedge, and ported wedge enclosures designed around the SQL-12 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\u003ePick the impedance that suits your amplifier. The dual 2 ohm version wires to 1 ohm in parallel or 4 ohms in series. The dual 4 ohm version wires to 2 ohms in parallel or 8 ohms in series.\u003c\/p\u003e\n\u003cp\u003eThe dust cap is available in paper or carbon fiber. Stereo Integrity publishes a single specification set for the SQL 12 and does not list separate figures for the carbon fiber cap.\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 11.33 in. \u003cstrong\u003eOuter diameter:\u003c\/strong\u003e 12.91 in. \u003cstrong\u003eMounting depth:\u003c\/strong\u003e 7 in. \u003cstrong\u003eDisplacement:\u003c\/strong\u003e 0.15 cu ft. Stereo Integrity lists 1.25 in from the baffle to the top of the surround and recommends at least 0.5 in of clearance above the surround to a grille.\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 12 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":44924024520793,"sku":"SI-SQL12-D2-PAPER","price":439.99,"currency_code":"USD","in_stock":false},{"title":"Dual 2 Ohm \/ Carbon Fiber","offer_id":44924024553561,"sku":"SI-SQL12-D2-CARBON","price":519.99,"currency_code":"USD","in_stock":false},{"title":"Dual 4 Ohm \/ Paper","offer_id":44924024586329,"sku":"SI-SQL12-D4-PAPER","price":439.99,"currency_code":"USD","in_stock":false},{"title":"Dual 4 Ohm \/ Carbon Fiber","offer_id":44924024619097,"sku":"SI-SQL12-D4-CARBON","price":519.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/stereo-integrity-sql-12-subwoofer-front.jpg?v=1789575900","url":"https:\/\/audiointensity.com\/products\/stereo-integrity-sql-12-series-2-subwoofer","provider":"Audio Intensity","version":"1.0","type":"link"}