Fox Acoustics FoxBox® 2007+ GM Crew Cab Quad 8" Subwoofer Enclosure 18 inch Subwoofer and 12 magnetic gap vents

and 12 magnetic gap vents maximize cooling during deep bass excursions

Bass Boost: 0–+9dB at 30Hz–60Hz — adjustable boost to enhance bass impact without additional processors

easier wiring and installation

extended highs up to 20 kHz

Real-world: stealthy

Fox Acoustics FoxBox® 2007+ GM Crew Cab Quad 8" Subwoofer Enclosure 18 inch Subwoofer and 12 magnetic gap ventsFoxBox 2007+ GM Crew Cab Quad 8" Subwoofer Enclosure is a vented, two chamber box designed for GM crew cab pickups, built to extract deep bass from an 8" woofer behind the rear seat in a durable, Line X finished enclosure. It fits 2007 and up GM 1500 2500 3500 crew cab trucks and, on 2019+ models, requires removal of the under seat storage tray. Sub Size: 8" x 4" designed to house an 8" woofer with a corresponding mounting footprint, ensuring proper