PRV Audio 10W650A-4 (Single Unit)High fidelity meets high output PRV Audio ALTO Series Woofers. Audio experts and professional musicians know that tone can make or break a performance, in the studio or on the stage. Thats why PRV Audios Alto Series woofers were carefully crafted and voiced to create a natural, smooth sound while remaining dynamic. To get the right sound, a special composite cone is built with non pressed paper (visible on the back side) for reduced break up and