Alpine R-A90S | R Series 6-Channel Hi-res Amplifier
Alpine R-A90S. 900W RMS Class D R Series 6 Channel Car Amplifier. R-Series Class D 2 ohm Stable 6-Channel Amplifier. 4 ohm: 75 watts x 4 channel + 150 watts x 2 channel. 2 ohm: 100 watts x 4 channel + 250 watts x 2 channel.