QPower Dual 12in Underseat Downfire Subwoofer Enclosure, Sub Box Compatible with Chevy Silverado XCab and GMC Sierra XCab Classic 1996-2006

The custom-made QPower Dual 12-Inch Underseat Subwoofer Box is designed for 1999–2006 GMC and Chevy Silverado Extended Cab trucks. Our speaker system enclosure delivers a significant upgrade to your vehicle’s audio performance. With an 11-inch cutout diameter, it is built to house a pair of 12-inch speakers, allowing you to enjoy full, dynamic sound from a setup tailored precisely to your truck’s interior. The enclosure’s low-profile construction slides securely beneath the rear bench, and its downward-firing design helps project rich, evenly distributed bass throughout the cabin. To simplify installation, the box includes terminal cup connectors that make establishing secure speaker connections quick and straightforward. The dual-chamber design ensures each subwoofer operates within its own optimized space, contributing to clearer and more balanced audio. Measuring 51.5 in (W) × 15.25 in (H) × 7.25 in (D) with a 5.5-inch mounting depth, the enclosure offers 0.95 cubic feet of airspace, giving your subwoofers the room they need to perform effectively. Constructed from durable 5/8-inch MDF and finished with a charcoal carpet covering, this enclosure maintains excellent rigidity, even during heavy bass output. Its solid build minimizes unwanted resonance, allowing your system to deliver cleaner, more accurate low-frequency response. With its thoughtful engineering and sturdy materials, this subwoofer box provides a reliable, high-performing foundation for your truck’s upgraded audio system.

• Custom X-Cab Classic Fit: Dual 12" underseat subwoofer enclosure compatible with 1996-2006 Chevy Silverado XCab and GMC Sierra XCab Classic trucks; Not compatible with Crew Cab models
• Durable Construction: Heavy-duty 5/8" MDF enclosure finished in charcoal carpeting for lasting performance
• Convenient Underseat Fit: Compact downfire design installs cleanly under the rear seat and preserves cabin space
• Optimized Audio Performance: 0.95 cu. ft. air space per sub, 5.5" mounting depth, and downfire layout deliver deep, controlled low-frequency output
• Trusted Q Power Brand: Known for precision-fit enclosures and dependable audio solutions, Q Power delivers performance-driven designs for serious audio builds