Q-Logic QLH-12D125 12-Inch Dual Subwoofer Enclosure Q-Logic's QLH-12D125 hatchback enclosure accept a pair of 12" subwoofers, each in its own 1.25 cubic foot sealed chamber. It's made from rugged, anti-resonant 3/4" fiberboard which resists flexing Rugged Q-Logic enclosures are famous for their performance and their tough construction. These boxes are virtually indestructible, thanks to reliable locking-joint construction and powerful adhesives. This box will fit in trunks, hatchback spaces, and the rear area of many SUVs and vans. Please measure the planned installation location to ensure fit. hatchback style enclosure for two 12" subwoofers3/4" MDF (medium density fiberboard) with gray carpet coveringtwo sets of spring clip connectorsinternal volume: 2.50 cubic feet (1.25 per sub) cutout size: 11-1/4"dimensions: 33-1/4"W x 15-1/4"H x 14-1/2"D1 x 9-7/8"D2