Scosche SEV15CC 15-Inch Slot Ported Single Subwoofer Enclosure (Grey/Black) " Medium density fiberboard front baffle and recessed side panels for easy lifting 100% Sealed joints with pre-cut 14" diameter hole Nickel plated spring loaded speaker terminals Pre-wired with fast-on terminals with poly fiber lining damper 2.45 cu. ft. internal volume