ASC Ford F150 Extended Super Cab Truck 2004-2008 Dual 10" Subwoofer Custom Fit Sub Box Speaker Enclosure Dimensions: Width 49" x Front Height 6-3/4" x Rear Height 7-3/4" x Depth 11-3/4" Install Location: Under Rear Seat Install Notes: Relocation or Removal of Jack is required Mounting Depth: 5-1/4 Inches Air Space: 0.55 Cubic Feet