ASC Chevy S10 or GMC Sonoma Extended Cab Truck 1982-2004 Dual 12" Subwoofer Custom Fit Sub Box Speaker Enclosure Dimensions: Width 40" x Height 14-1/2" x Top Depth 11-3/4" x Bottom Depth 12-3/4" Install Location: Rear of Cab Install Notes: Jump seats are no longer useable Mounting Depth: 9 Inches Air Space: 1.97 Cubic Feet