Sound Ordnance BB122-175V Double 12" Vented Box 1.615 cu.ft (x2) 5/8" MDF (medium-density fiberboard) with black carpet covering internal volume: 1.61 cubic feet per chamber dimensions: 32-3/4"W x 15-1/8"H x 15-7/8"D1 x 12-7/8"D2