
The Q-Power 12" subwoofer enclosure box is custom made for GMC and Chevy Extended Cab trucks, model year 1999 to 2006. This enclosure is designed to fit underneath the rear seats and boasts .95 cubic feet of air space.The Q-Power 12" subwoofer box is made from solid 5/8" MDF construction and features charcoal carpet covering, and terminal cup connectors. Turn your ride into a sound machine with the help of the Q-Power 12" Subwoofer Enclosure! If you want the most output for your money, this is the way to go. PLEASE NOTE: This Sub Box is made to fire downward

The Q-Power 12" subwoofer enclosure box is custom made for GMC and Chevy Extended Cab trucks, model year 1999 to 2006. This enclosure is designed to fit underneath the rear seats and boasts .95 cubic feet of air space.The Q-Power 12" subwoofer box is made from solid 5/8" MDF construction and features charcoal carpet covering, and terminal cup connectors. Turn your ride into a sound machine with the help of the Q-Power 12" Subwoofer Enclosure! If you want the most output for your money, this is the way to go. PLEASE NOTE: This Sub Box is made to fire downward

Upgrade your truck’s sound system with the QPower GMC12-2007-HT 2-Hole 12" Underseat Subwoofer Enclosure, engineered to deliver powerful, accurate bass without sacrificing interior space. Compatible with 2007, 2008, 2009, 2010, 2011, 2012, and 2013 Chevy Silverado XCab and GMC Sierra XCab trucks, this enclosure is precision-built to fit vehicles with a high transmission hump under the seat, ensuring a seamless, factory-style installation. Not compatible with Crew Cab models.This downfire enclosure houses two 12-inch subwoofers, directing bass toward the floor for tighter, more controlled low-frequency response. With 0.80 cubic feet of internal air space per subwoofer and a 5.5-inch mounting depth, it provides an acoustic environment for deep, impactful bass that enhances every drive—whether you’re cruising the highway or working the jobsite.Finished in a rugged bed liner coating, the sub enclosure is made to handle daily wear, temperature changes, and the demands of truck life while maintaining a clean, professional appearance. Its compact underseat design keeps your cabin open and functional, preserving legroom and storage while significantly upgrading your audio performance.Perfect for custom and high-performance truck audio systems, the speaker box combines durability, precise fitment, and optimized low-frequency output. If you want richer sound, strong bass response, and a clean install tailored to your X-Cab truck, this QPower GMC12-2007-HT enclosure delivers performance you can hear and reliability you can trust.

The AK-G25-12 from King Boxes is your go-to box for any 2014 through 2018 Silverado/Sierra Crew Cab. It holds 2 x 12-in. downfiring woofers under the seat and delivers the punch you're looking for from your subs. And since the enclosure is stapled and glued, it isn’t going anywhere for a long time!

Give your GMC or Chevy's audio system a rockin' sound with this Q-Power Dual 12-Inch Subwoofer Box.This sub box is for 2014-2016 crew cab trucks and is finished with a bed liner coater for enhanced durability. It is compatible with 12-inch speakers and sealed for universal downfire under the seat. It fits in most trucks and is ready to deliver deep and powerful bass. It features high-quality spring-loaded terminals and 0.9 cubic feet of air space.Take your ride from boring to bumping with this Q-Power Dual 12-Inch Sub Box. You'll feel like you are at your own concert with every drive.
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