DOWN4SOUND | PRO-FAB – BIRCH – 4X 8-INCH PORTED SUBWOOFER ENCLOSURE – 99-07 GM/CHEVY EXTENDED CAB – 2.5-INCH SEAT LIFT REQUIRED

Tailored 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. Crafted from premium birch wood and finished with a durable polyurethane bedliner, this enclosure is built to withstand high-performance demands. A 2.5-inch seat lift is required for proper installation. Compatibility: 1999-2007 GM/Chevy Extended Cab (Under Seat, 2.5-Inch seat lift is required BUT IS NOT INCLUDED) Configuration: Quad 8-inch subwoofer openings Material: Premium birch wood with polyurethane bedliner coating for enhanced durability Outside Dimensions: Width: 55 inches Front Height: 9 1/2 inches Rear Height: 12 1/2 inches Depth: 14 3/4 inches Net Airspace (After Displacements): 1.29 cubic feet per side Port Information: Port Area: 10.98 square inches each Port Depth: 12 1/2 inches Tuning Frequency: 32.5 Hz Recommended Subwoofer: Optimized for Down4Sound DBz 8″ Subwoofers This enclosure is the perfect fit for upgrading your GM/Chevy Extended Cabs audio system, providing exceptional durability and bass performance for high-output setups. ****ALL SALES ARE FINAL****