The Q Power GMC1220074DR is a custom-fit dual 12-inch down-firing subwoofer enclosure designed specifically for 2007–2013 Chevrolet Silverado and GMC Sierra Crew Cab trucks. Engineered to deliver deep, powerful bass while maintaining valuable cabin space, this enclosure mounts neatly under the rear seat for a clean OEM-style appearance. Its down-firing design helps protect subwoofers from cargo damage and everyday wear while improving low-frequency performance and durability. Constructed from durable MDF wood and wrapped in premium charcoal automotive carpet, the GMC1220074DR is built for long-lasting performance in daily-driver and high-output truck audio systems. Features & Highlights Custom-fit dual 12-inch subwoofer enclosure Designed for 2007–2013 Chevy Silverado & GMC Sierra Crew Cab trucks Under-seat down-firing enclosure design Protects subwoofers from cargo and impact damage Space-saving OEM-style fitment Durable MDF wood construction Premium charcoal automotive carpet finish Designed for deep, powerful low-frequency bass response Compatible with most shallow and moderate-depth 12-inch subwoofers Ideal for aftermarket truck audio systems and daily-driver installs Crew Cab only — does NOT fit Extended Cab models Specifications Specification Details Enclosure Type Dual 12" Sealed Down-Firing Vehicle Fitment 2007–2013 Chevy Silverado / GMC Sierra Crew Cab Subwoofer Size Dual 12-Inch Configuration Under-Seat Down-Fire Material MDF Wood Construction Finish Premium Charcoal Carpet Number of Speaker Openings 2 Mounting Depth Approx. 5.5" Width Approx. 50.5" Height Approx. 16" Design Style Vehicle-Specific Cab Compatibility Crew Cab Only Application Truck Audio Systems
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