JL Audio SB-GM-SLVCC4/12TW3 Audio Packages Forged and machined brass construction

Forged and machined brass construction with marine-grade stannum plating

CAE (Computer-Aided Engineering) was applied to create a curvilinear cone with varying thicknesses during the injection process

Butyl Rubber

Enclosure and Subwoofer Built in USA with global components

By combining direct power conversion with an ultra-high current output section

JL Audio SB-GM-SLVCC4/12TW3 Audio Packages Forged and machined brass constructionStealthbox for 2019 Up (Gen 4) Chevrolet Silverado GMC Sierra 1500 Crew Cab Trucks and 2020 Up 2500 3500 Crew Cab Trucks This generation of Chevrolet GMC trucks is bringing new levels of interior refinement and technology to the full size truck segment. Our Stealthbox enhances all this by adding impressive, high quality bass without losing any of your precious people space or interior functionality. The Stealthbox slips under the truck's rear seat and