Focal AP 4340 Auditor Series 4 Channel Amp Class A B Car Amplifier 4 x 70w RMSFocal Auditor AP 4340 4 3 2 CHANNEL A B CLASS AMPLIFIER High fidelity Class AB amp Whether you're talking about audio products for home, car, or studio, the name Focal always comes up when the conversation centers around sound quality. Their Auditor Series AP 4340 4 channel amp makes a great candidate for powering any high performance car audio system. This amp puts out 70 watts RMS per channel with very low distortion and very wide frequency