{"product_id":"performance-optimized-sealed-12-enclosure-stereo-integrity-12-sql-series","title":"Performance Optimized Sealed  12\" Enclosure | Stereo Integrity 12\" SQL Series","description":"\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: #ffffff; }\n  .po-hero { background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%); padding: 60px 40px; text-align: center; color: white; }\n  .po-hero .po-title { font-size: 2.6em; font-weight: 800; text-transform: uppercase; letter-spacing: 2px; margin: 0 0 10px 0; color: white; }\n  .po-hero .po-subtitle { font-size: 1.2em; font-weight: 300; opacity: 0.9; 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(6, 182, 212, 0.2); border: 1px solid #06b6d4; color: #67e8f9; padding: 8px 20px; border-radius: 20px; font-size: 0.9em; font-weight: 600; letter-spacing: 0.5px; }\n  .po-section { padding: 50px 40px; border-bottom: 1px solid #e2e8f0; background: #ffffff; }\n  .po-section:nth-child(even) { background: #f0f9ff; }\n  .po-section h2 { color: #0e7490; font-size: 2em; font-weight: 700; margin: 0 0 20px 0; padding-bottom: 12px; border-bottom: 3px solid #06b6d4; }\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: #ffffff; border: 1px solid #e2e8f0; border-top: 4px solid #06b6d4; padding: 25px; border-radius: 4px; }\n  .po-card h4 { color: #0e7490; font-size: 1.15em; font-weight: 700; margin: 0 0 12px 0; text-transform: uppercase; letter-spacing: 1px; }\n  .po-card p { font-size: 0.98em; color: #475569; margin: 0; }\n  .po-highlight { background: #f0f9ff; border-left: 4px solid #06b6d4; 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%, #0e7490 100%); padding: 60px 40px; text-align: center; color: white; }\n  .po-cta h2 { font-size: 2.2em; font-weight: 700; margin: 0 0 20px 0; color: white; border: none; padding: 0; }\n  .po-cta p { font-size: 1.15em; opacity: 0.92; max-width: 800px; margin: 0 auto 20px auto; color: white; }\n  @media (max-width: 768px) {\n    .po-hero { padding: 40px 20px; }\n    .po-hero .po-title { font-size: 1.8em; }\n    .po-section { padding: 30px 20px; }\n    .po-section h2 { font-size: 1.6em; }\n    .po-grid { grid-template-columns: 1fr; }\n    .po-cta { padding: 40px 20px; }\n    .po-cta h2 { font-size: 1.6em; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"po-wrap\"\u003e\n\n  \u003cdiv class=\"po-hero\"\u003e\n    \u003cp class=\"po-title\"\u003ePerformance Optimized | Stereo Integrity SQL 12\u003c\/p\u003e\n    \u003cp class=\"po-subtitle\"\u003eSingle 12\" Sealed Enclosure | Driver-Specific for the SQL 12 Series 2\u003c\/p\u003e\n    \u003cdiv class=\"po-badges\"\u003e\n      \u003cspan class=\"po-badge\"\u003e1.0 ft³ Net\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eDriver-Specific\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eDouble Baffle\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003e20\" × 15\" × 13.625\"\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eV-Groove \/ Dado\u003c\/span\u003e\n      \u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eThe Stereo Integrity SQL 12 Deserves a Box Built for It\u003c\/h2\u003e\n    \u003cp\u003eThe Stereo Integrity SQL 12 Series 2 is a serious high-power driver — 1000 watts RMS, 26mm one-way linear Xmax, 2.75\" copper voice coil on a split black anodized aluminum former, and enough motor force to move meaningful air in a properly sized sealed cabinet. Drop it in a generic box and you'll get loud bass. Drop it in a cabinet engineered around SI's published Thiele-Small parameters, with construction sized for the power level the SQL 12 delivers, and you'll hear what Nick Sowa's team built this driver to do.\u003c\/p\u003e\n    \u003cp\u003eThe Performance Optimized Sealed 12 for Stereo Integrity SQL 12 is that cabinet. Internal volume, baffle thickness, mounting hardware, and construction methods are all chosen to extract the SQL 12's full mechanical and acoustic potential — and to hold together as a rigid structure at the power levels this driver is capable of.\u003c\/p\u003e\n    \u003cdiv class=\"po-highlight\"\u003e\n      \u003cp\u003eThis enclosure is engineered specifically around the Stereo Integrity SQL 12 Series 2. The 1.0 cubic foot net volume matches the maximum sealed volume SI specifies for the SQL 12 — where the driver's deep low-end extension fully develops with F3 points in single-digit territory.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eWhy Performance Optimized Sits Where It Does\u003c\/h2\u003e\n    \u003cp\u003eThe Performance Optimized line is the bridge between our standard Performance Series and our top-tier Professional Series. Same Performance-tier construction quality — Langboard Elite MDF, V-groove and dado joinery, ShopSabre CNC routing — but the geometry of every panel is cut around one specific driver instead of a class of drivers. For the SQL 12 specifically, that also means doubled baffle stock at the mounting position to handle the driver's power capability.\u003c\/p\u003e\n    \u003cdiv class=\"po-grid\"\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003evs Performance Series\u003c\/h4\u003e\n        \u003cp\u003eStandard Performance Series boxes (P6 through P15) are built for universal driver fitment within a size class. Great if you want flexibility across multiple driver options. Performance Optimized takes the same construction foundation and locks the airspace and hardware to one specific driver.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003evs Professional Series\u003c\/h4\u003e\n        \u003cp\u003eProfessional Series uses extensive multi-layer baffles, triple-stacked construction, and a 2-year warranty for the most demanding builds. Performance Optimized delivers driver-specific engineering with double baffle construction at a more accessible price point with a 1-year warranty.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eEngineered Around the SQL 12's Parameters\u003c\/h2\u003e\n    \u003cp\u003eStereo Integrity specifies the SQL 12 Series 2 for sealed enclosures between 0.65 and 1.0 cubic feet. The Performance Optimized Sealed 12 delivers 1.0 cubic feet net — the maximum of SI's specified range, where the SQL's deep low-end extension characteristics fully develop. In this cabinet, the SQL 12 plays down to F3 points in single-digit territory, delivering the low-frequency response that makes SI's SQL Series unmatched at its price point.\u003c\/p\u003e\n    \u003ch3\u003eVolume Selection\u003c\/h3\u003e\n    \u003cp\u003e1.0 cubic foot net is the maximum of SI's recommended sealed volume range. Smaller volumes tighten Qtc and lose some low-end extension. Larger volumes fall outside SI's specification and compromise transient control. 1.0 cubic foot is where the SQL 12 delivers on its full low-end capability while staying inside the driver's engineered operating window.\u003c\/p\u003e\n    \u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n    \u003cp\u003eThe baffle is cut to the SQL 12's exact 11.33\" cutout specification and doubled to 1.5\" total thickness at the mounting position. The SQL 12's 7\" mounting depth leaves comfortable internal clearance inside the 13.625\" deep cabinet. 8\/32 threaded inserts are pressed into the doubled baffle stock for full-depth thread engagement and secure retention at high excursion levels.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003ePerformance Series Construction, Sized for Real Power\u003c\/h2\u003e\n    \u003cdiv class=\"po-grid\"\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003eDouble Baffle Mounting Face\u003c\/h4\u003e\n        \u003cp\u003eThe mounting face uses a doubled 1.5\" total baffle thickness — two layers of 3\/4\" Langboard Elite MDF bonded together at the driver mounting position. Doubled baffle stock resists baffle flex and mounting screw pullout at the 1000-watt RMS power levels the SQL 12 delivers.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003e8\/32 Threaded Inserts Into Double Baffle\u003c\/h4\u003e\n        \u003cp\u003eThe baffle uses 8\/32 threaded inserts pressed into the doubled 1.5\" MDF backside, providing full-depth thread engagement for the supplied stainless steel mounting screws. No stripped pilot holes, no MDF damage from drywall screws, and secure retention at high excursion levels.\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 let the cabinet fold into shape with maximum glue surface. Dado joints lock the doubled baffle and rear panel into the side walls — no fasteners visible from outside, no exposed end grain at joints.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"po-card\"\u003e\n        \u003ch4\u003ePre-Wired Terminal Cup\u003c\/h4\u003e\n        \u003cp\u003eProline X ABS\/carbon fiber composite terminal cup, pre-wired with 12-gauge OFC inside the cabinet, with stainless steel hardware accepting both spade and banana terminations on the input side.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cp\u003eEvery panel is cut on ShopSabre CNC routers in our Tullahoma, TN facility. Tolerances that manual fabrication can't hold — joints close cleanly, baffle concentricity stays accurate, and internal volume is consistent unit to unit. The doubled baffle at the mounting position is bonded under clamping pressure for a monolithic 1.5\" stock at the point where structural integrity matters most.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eCustomize Your Build\u003c\/h2\u003e\n    \u003ch3\u003eCarpet Finish\u003c\/h3\u003e\n    \u003cp\u003e\u003cstrong\u003eDark Gray Trunkliner\u003c\/strong\u003e is the standard durable wrap, matched to most factory trunk and cargo-area carpet tones. \u003cstrong\u003ePlush Black\u003c\/strong\u003e (+$10) is a deeper, more luxurious nap that pairs well with blacked-out interiors and show builds.\u003c\/p\u003e\n    \u003ch3\u003eAcrylic Insert Color\u003c\/h3\u003e\n    \u003cp\u003eChoose \u003cstrong\u003eBlack, Blue, Red, or White\u003c\/strong\u003e for the front baffle insert to match your build. Or skip the insert entirely (-$40) for a clean, understated look. The insert is purely cosmetic — performance is identical across colors.\u003c\/p\u003e\n    \u003ch3\u003eBox-Only or Loaded\u003c\/h3\u003e\n    \u003cp\u003eAdd a Stereo Integrity SQL 12 Series 2 driver directly to your order in \u003cstrong\u003eDual 2-ohm or Dual 4-ohm\u003c\/strong\u003e impedance and \u003cstrong\u003ePaper or Carbon Fiber\u003c\/strong\u003e dust cap configurations. Already own your SQL 12? Order the enclosure box-only and drop in the driver you have.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eWiring the SQL 12 to Your Amplifier\u003c\/h2\u003e\n    \u003cp\u003eThe Stereo Integrity SQL 12 is a dual voice coil driver available in Dual 2-ohm (D2) or Dual 4-ohm (D4) configurations. The pre-wired terminal cup accepts either impedance version via 12-gauge OFC, with stainless steel input hardware.\u003c\/p\u003e\n    \u003cp\u003eA Dual 2-ohm SQL 12 wired in parallel presents a 1-ohm load. A Dual 2-ohm wired in series presents 4 ohms. A Dual 4-ohm SQL 12 wired in parallel presents 2 ohms, and wired in series presents 8 ohms. The SQL 12 is rated for 1000 watts RMS — aim for a clean, well-regulated amplifier delivering 750 to 1000 watts at your chosen impedance. At this power level, amplifier quality matters more than headline numbers — regulated power supply, low THD, and honest RMS ratings.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-section\"\u003e\n    \u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n    \u003cp\u003eEvery Performance Optimized enclosure is CNC-cut, assembled, and finished in our Tullahoma, TN facility. Components are pulled from inventory after your order is placed, then bonded and wrapped — a 2 to 5 business day assembly window before the box ships. No pre-built inventory sitting in warehouses, warping in storage. Each unit is built to order.\u003c\/p\u003e\n    \u003cp\u003eBacked by a 1-year limited warranty against structural failure and hardware defects. Questions on fitment, wiring, or amplifier pairing? \u003ca href=\"\/pages\/contact-us\"\u003eContact us\u003c\/a\u003e — we install this gear ourselves, in our own vehicles.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"po-cta\"\u003e\n    \u003ch2\u003eThe SQL 12, Engineered Correctly\u003c\/h2\u003e\n    \u003cp\u003eDriver-specific 1.0 cubic foot airspace, doubled baffle construction, V-groove and dado joinery, and Performance Series build quality sized for the SQL 12's 1000-watt RMS capability. The correct cabinet for a serious single 12 build.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Plush Black \/ Black","offer_id":43793847812185,"sku":"PO SI 12-S BB","price":299.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Blue","offer_id":43793847844953,"sku":"PO SI 12-S BBL","price":299.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ Red","offer_id":43793847877721,"sku":"PO SI 12-S BR","price":299.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ White","offer_id":43793847910489,"sku":"PO SI 12-S  BW","price":299.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black \/ None","offer_id":43793847943257,"sku":"PO SI 12-S None","price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/POSI12.png?v=1784912288","url":"https:\/\/audiointensity.com\/products\/performance-optimized-sealed-12-enclosure-stereo-integrity-12-sql-series","provider":"Audio Intensity","version":"1.0","type":"link"}