ASC Ford F150 Extended Super Cab Truck 2004-2008 Single 10" Vented Subwoofer Custom Fit Sub Box Speaker Enclosure Dimensions: Width 30-1/4" x Height 16-1/4" x Top Depth 3" x Bottom Depth 4-3/4" Install Location: Under Rear Seat (Driver Side) Install Notes: Relocation or Removal of Jack is required Mounting Depth: 5-1/2 Inches Air Space: 0.90 Cubic Feet