Sound Ordnance BB122-125V Double 12" Vented Box 1.36 cu.ft (x2) 5/8" MDF (medium-density fiberboard) with black carpet covering internal volume: 1.36 cubic feet per chamber dimensions: 32-3/4"W x 14-3/8"H x 14-3/8"D1 x 11-1/4"D2