ASC Ford F150 Extended Super Cab Truck 2009-2014 Single 12" Subwoofer Custom Fit Sub Box Speaker Enclosure Dimensions: Width 26" x Depth 15" x Front Height 9" x Back Height 4-1/2" Install Location: Under Rear Seat Install Notes: No Modifications Required Mounting Depth: 5-1/2 Inches Air Space: 0.80 Cubic Feet