60W PA amplifier Front panel ON / OFF button Volume adjustment knob   Back panel AUX RCA L / R input AUX RCA output L / R 100V output terminal 70V output terminal 4-16 Ohm output terminal COM output terminal 12VDC input terminals 220V / 50Hz input plug      Technical characteristics Frequency response: 20Hz-20KHz (± 2.0dB) Harmonic distortion: & lt; 0.5% (1KHz) SNR (Signal to Noice Ratio): 80dB Channel separation: 50dB (1KHz) Output power: 60W Manufacturer code: AV-900