Orion XTR4000.1D XTR Series Amplifier RMS Watts @ 4 Ohm Stereo 12.6V:  1750 Watts X 1 Channel / RMS Watts @ 2 Ohm Stereo 12.6V: 2800 Watts X 1 Channel / RMS Watts @ 1 Ohm Stereo 12.6V: 4000 Watts X 1 Channel RMS Power Watts: 8000 Watts Frequency Response 20Hz~250KHz Signal Noise Ratio: 90dB Hi Pass Freq. 30Hz-250Hz / Low Pass Freq. 30Hz-250Hz