Orion CB1100.1M2 Cobalt Series Mono Channel Amplifier RMS Watts @ 4 Ohm Stereo 14.4V : 375 / RMS Watts @ 2 Ohm Stereo 14.4V : 550 Watts Nominal : 1100 / Max Music Power Watts : 2200 Frequency Response 10Hz~36KHz(-3dB) Signal Noise Ratio: 90dB Hi Pass Freq. 50Hz-4KHz / Low Pass Freq. 40Hz-500Hz