Single 10" Enclosure. .65 cu.ft. x 1. Mounts behind seat, to back wall, woofer is slot-loaded against the wall, so no grill is needed. Woofer Magnet Diameter(Mounting Depth): 5"-7"(5 3/4") Dimensions: 12 3/4"H X 5 1/2"TD X 7 1/4"BD X 25 1/4"W