Volfenhag is a relatively new name in car audio competition subwoofers. The ZX4712 DVX and the ZX4710 DVX Subwoofers are an excellent choice for a very high power Aluminum Cone Competition Subwoofers.This sub is all business when it comes to competition performance. Its industrial engineered design and structure give this driver the ability to take very large amounts of power hour after hour while delivering ultra clean low distortion very high sound pressure levels. These drivers really deliver a serious deep chest pounding bottom end that will rock your soul!