Pioneer GM-E7004 4Channel Class AB Amplifier 70rms x 4Pioneer GM E7004 4Channel Class AB Amplifier 70rms x 4 The Pioneer GM E7004 is a 4 channel Class AB amplifier delivering 70W RMS per channel. It provides clean, balanced sound for car speakers. Furthermore, it is an ideal choice for upgrading or expanding your car audio system. 4 channel Class AB amplifier 70W RMS x 4 channels 280W total peak power High efficiency design for clean, balanced sound Low pass and high pass filters for precise audio