Soundstream Ta1.600d 1 Channel 600 Watt Tarantula Amplifier RMS Power 4 Ohm - 250w x 1 RMS Power 2 Ohm - 375w x 1 RMS Power 1 Ohm - 600w x 1 Total Harmonic Distortion: 4 Ohm power 1.00% Signal-to-Noise Ratio: 4 Ohm power 89dB