ASC Ford F250 or F350 Super Crew Cab Truck 2001-2014 Dual 12" Subwoofer Custom Fit Sub Box Speaker Enclosure Dimensions: Width 55" x Height 16-1/4"" x Top Depth 3" x Bottom Depth 6" Install Location: Behind Rear Seat Install Notes: Works with or without rear power window. Permanent removal of jack kit, rear seat belt cover and rear carpet is required. Mounting Depth: 4-1/4 Inches Air Space: 0.65 Cubic Feet