The Q Power QBGMC122014DCAB is a dual 12-inch sealed under-seat enclosure designed specifically for 2014+ Chevrolet Silverado and GMC Sierra Double Cab trucks. Its down-firing design helps protect the subwoofers while improving low-frequency response and preserving usable cabin space. Unlike many generic prefab truck boxes, this enclosure is vehicle-specific and shaped to fit cleanly under the rear seat of Double Cab/Extended Cab GM trucks. It uses a rugged sprayed bedliner finish instead of carpet, making it more durable for work trucks and daily-driver abuse. Key Features Dual 12-inch sealed enclosure Under-seat down-firing design Fits 2014–2019 GM/Chevy Double Cab trucks Does NOT fit Crew Cab models Durable sprayed bedliner coating MDF wood construction Spring-loaded speaker terminals Vehicle-specific fitment Designed to maximize cabin space Specifications Enclosure type: Sealed Woofer size: Dual 12" Air space: 0.55 ft³ per chamber Mounting depth: 4.5"–5.5" depending on source/spec variation Dimensions: Approx. 55.25"–56.5" W Approx. 13" H Approx. 7.5"–16.5" D Vehicle Compatibility Chevrolet Silverado Double Cab (2014–2019) GMC Sierra Double Cab (2014–2019) Extended/Double Cab only Not compatible with Crew Cab trucks