Pioneer GM-D8704 1200 Watts 4 Channel Bridgeable Car Stereo Radio Amp AmplifierPioneer GM D8704 1200 Watts Max 4 Channel Car Stereo Radio Bridgeable Amplifier Big Power, Small Size Pioneers new extra efficient Class D digital amplifiers mark a dramatic improvement in power output capability, yet are 50% smaller than the current GM Series Class AB amplifiers. That makes them more versatile in terms of installation as well as performance. Improved Circuit Design To prevent circuit shutdown, Pioneer's new digital amplifier circuit