REAudio SA 500.5 1600W 5-Channel SA Series Full Digital Amplifier SA Series 5-Channel Full Digital Car Amplifier RMS Power Rating: 4 ohms: 63 watts x 4 chan. / 2 ohms: 85 watts x 4 chan. / Bridged, 4 ohms: 302 watts x 2 chan. Max power output: 1600 watts 5/4/3/2 or Mono channel operation Speaker-level (high-level) inputs with signal sensing for automatic turn-on