The VO-M6x9 speakers can be used to transform a stock system into a concert level experience without cutting up interior panels. Plus, an outdoor PA type system is just a simple array away. The VO mids feature high-tech refinements like a low distortion motor with internal shorting rings, long fiber cone stock with curvilinear bodies. The elements combine for a smooth extended frequency range. This low moving mass design coupled to precision machined motors produces the ultra fast transients and high output needed to keep up with any subwoofer system. The VO-M Series is marine treated for use in boats, motorcycles, powersport vehicles, and PA systems.