Atrend 15ks Single 15-Inch Sealed Square Solo Baric L7 or L5 Car Subwoofer Enclosure Single 15" Sealed Subwoofer Box Square Cutout 2.5 Cu Ft Kicker Silver Spring Loaded Terminal Cups 3/4" Hardwood MDF Construction Dimensions 18" W X 17" H X 17.25" D 2.5 Cu Ft Per Sub