Boss Audio Systems CXX12 is a 12-inch, 4-ohm subwoofer with a peak power handling of 1000 watts. It features a polypropylene cone, rubber surround, and a pole-vented design. The CXX12 is designed to work in a medium-sized sealed or ported enclosure. The sealed enclosure dimensions are 18" (457.2mm) in length, 12" (304.8mm) in width, and 13" (330.2mm) in height. The ported enclosure dimensions are 24" (609.6mm) in length, 12" (304.8mm) in width, and 14" (355.6mm) in height. The CXX12 has a resonant frequency of 32 Hz, a Qts of 0.61, a Qms of