You better bolt this Polk 12-Inch 720W Slot-Loaded Port Subwoofer Enclosure down because it will knock your vehicle's tires off. This enclosure is fully-loaded with a single, powerful 12-inch subwoofer. It has a RMS power handling of 360 watts and a peak power handling of 720 watts. The enclosure is slot-ported and it reduces air turbulence at the port mouth for higher bass output and minimal noise and distortion. Internally-braced with heavy-duty medium-density fiberboard, this Polk enclosure features the same low-resonance material that is used in the world's finest speaker enclosures. It's loaded polypropylene cone is stiff for quick, tight, punchin' bass that withstands hot vehicle environments. It also handles humidity and long exposure to the sun's rays. For outrageous bass that will blow your mind and sound awesome in your vehicle, install this Polk 12-Inch 720W Slot-Loaded Port Subwoofer Enclosure.