Increase the power to your factory or aftermarket speakers with Pioneer amplifiers from OnlineCarStereo.com. These amps increase the signal from the receiver so your music is louder and clearer. We have amplifiers with anywhere from 1 to 5 channels plus bridgeable amps that accommodate ever-changing setups. There are Pioneer Class AB amps for full-range speakers and Class D amps for subwoofers and compact cars. Buy with confidence from an authorized Pioneer Electronics dealer that provides lifetime tech support.