ASC Ford F150 Super Crew Cab Truck 2009-2014 Dual 12" Subwoofer Custom Fit Sub Box Speaker Enclosure Dimensions: Width 50-1/2" x Height 13-3/4" x Depth 8-3/4" Install Location: Under Rear Seat Install Notes: No Modifications Required Mounting Depth: 5 Inches Air Space: 0.80 Cubic Feet