NEW! GMC Chevy Crew Cab 2007-2013 Underseat Dual 10" Subwoofer Sub Box Enclosure Dimensions: 50.5" (W) x 16" (H) x 5"-9" (Top D-Bottom D) 5/8" MDF Construction Mounting Depth: 5.5" Dual Chamber Design, Terminal Cup Connectors Charcoal Carpet Covering