Kicker 40vcwr122 is a 12 inch loaded car audio system. It is sealed in an enclosure box. Its 1000 watt car audio system. You have to attach it with at least 500 watt amplifier. This subwoofer is made with a very tough material. Its cone is made with mioca injected polypropylene and has a tough rubber surround on it. The surround passes more air through it and give you a more deep bass.