Eton SR 60.4 Class AB 4 Channel Amplifier Specifications 4Ohm   4x 60 Watts 2Ohm   4x 80 Watts Switchable high pass filter : 50Hz - 500 Hz or 500Hz - 5000Hz (12dB/oct) Variable subsonic filter : 25 Hz - 250Hz (12dB/oct) Signal to noise ratio  : >100dB Damping Factor  : >200 Operation Voltage : DC+11V - +14,8V Minimum Speaker Impedance : 2 Ohm Dimensions : 140x50x304 mm