Skar Audio RP-150.4AB Full-Range Car Amplifier, 1000 Watt Class A/B 4 Channel Misfit 4-channel class a/b power amplifier Rams power at 2 ohms: 250 watts x 4 channels Rams power at 4 ohms: 150 watts x 4 channels User adjustable controls: gain, variable LPF, huff, bass EQ (0, 6, 12 dB) Signal to noise ratio: 105 dB