{"title":"Down4Sound 8-Inch Subwoofer Enclosures","description":"\u003cp\u003eShop 7+ \u003cstrong\u003eDown4Sound 8-Inch Subwoofer Enclosures\u003c\/strong\u003e at JS Ultimate Sounds, your authorized Down4Sound dealer. Find the perfect 8-Inch subwoofer enclosures for your build with fast, free shipping and expert support.\u003c\/p\u003e","products":[{"product_id":"down4sound-pro-fab-birch-4x-8-inch-ported-subwoofer-enclosure-99-07-gm-chevy-extended-cab-2-5-inch-seat-lift-required","title":"Down4Sound PRO-FAB - Birch - 4X 8-INCH Ported Subwoofer Enclosure - 99-07 GM\/CHEVY Extended CAB - 2.5-INCH Seat Lift Required","description":"\u003cp\u003eTailored for the 1999-2007 GM\/Chevy Extended Cab, this Down4Sound PRO-FAB enclosure is designed for serious bass enthusiasts. Featuring four 8-inch subwoofer openings, it delivers precision-tuned bass output with a tuning frequency of 32.5 Hz. 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Free shipping on orders $99+.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Down4Sound","offers":[{"title":"Default Title","offer_id":66828391088173,"sku":"TD4S-PFB-GM9907-488SL","price":469.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/8096\/4909\/files\/down4sound-pro-fab-birch-4x-8-inch-ported-subwoofer-enclosure-99-07-gm-chevy-extended-cab-2-5-inch-seat-lift-required-w_f1571649-d00e-4df8-ae37-670936565b99.jpg?v=1782676713"},{"product_id":"down4sound-pro-fab-birch-4x-8-inch-ported-subwoofer-enclosure-19-gm-chevy-crew-cab-2-5-inch-seat-lift-required","title":"Down4Sound PRO-FAB - Birch - 4X 8-INCH Ported Subwoofer Enclosure - 19+ GM\/CHEVY Crew CAB - 2.5-INCH Seat Lift Required","description":"\u003cp\u003eDesigned for the 2019+ GM\/Chevy Crew Cab, this Down4Sound PRO-FAB enclosure is tailored for audio enthusiasts seeking deep, powerful bass. 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With pre-cut panels and a straightforward assembly process, this enclosure is perfect for enthusiasts looking to build their own high-performance subwoofer box.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003eFits one 8-inch subwoofer\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eMaterial\u003c\/h2\u003eHigh-quality construction for optimal sound performance\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eDimensions\u003c\/h2\u003e11.5\" Depth x 24\" Width x 9.75\" Height\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eTuning Frequency\u003c\/h2\u003e34 Hz\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eCutout Diameter\u003c\/h2\u003e7.36 inches\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eTerminal Rating\u003c\/h2\u003e1000W\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eInternal Volume\u003c\/h2\u003e1 cubic foot (after displacement)\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eAssembly Required\u003c\/h2\u003eYes – DIY kit with pre-cut pieces and easy-to-follow instructions\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eIdeal For\u003c\/h2\u003eDIY builders looking to customize their sound system with a single 8-inch subwoofer enclosure\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003e \u003c\/h2\u003e \u003ch2\u003e***ALL SALES ARE FINAL***\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAuthorized Down4Sound dealer at JS Ultimate Sounds. 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This flat pack is precision-engineered to fit dual 8-inch subwoofers and features a ported design for deep, powerful bass. Constructed from durable birch wood, it offers exceptional strength, acoustics, and longevity. 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Constructed from premium birch wood and coated with a polyurethane bedliner, this enclosure combines durability with superior audio performance.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e2007-2013 GM\/Chevy Crew Cab (Under Seat, No Lift Required)\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eConfiguration\u003c\/h2\u003eDual 8-inch subwoofer openings, optimized for Down4Sound DBz 8\" subwoofers\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eMaterial\u003c\/h2\u003ePremium birch wood with polyurethane bedliner coating for enhanced durability\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003eOutside Dimensions\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e\n\u003ch2\u003eWidth\u003c\/h2\u003e54 inches\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eFront Height\u003c\/h2\u003e9 1\/2 inches\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eRear Height\u003c\/h2\u003e8 inches\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eDepth\u003c\/h2\u003e14 inches\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003eNet Airspace (After Displacements)\u003c\/h2\u003e0.98 cubic feet \u003ch2\u003ePort Information\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e\n\u003ch2\u003ePort Area\u003c\/h2\u003e11.22 square inches\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003ePort Depth\u003c\/h2\u003e23 1\/2 inches\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eTuning Frequency\u003c\/h2\u003e33.66 Hz\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eThis expertly tuned enclosure enhances your vehicle’s audio system by delivering deep, rich bass for an immersive listening experience. 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