2 KENWOOD KFC-W3012 (12 inch 1200 Watt Subwoofers) & KENWOOD KAC-9105D (Mono ... Pair of Kenwood KFC-W3012 12" Subwoofers One Kenwood KAC-9105D 1800W Mono Channel Amplifier KFC-W3012 top-mount depth: 6-7/8" KFC-W3012 sealed box volume: 0.75-1.75 cubic feet * ported box volume: 1.0-2.0 cubic feet KAC-9104D Dimensions: 13-11/16"W x 2-3/8"H x 9-5/16"D