high power amplifier Output power: 2/3/4×(150W-300W)/8Ω Frequency response: 20HZ-20KHZ Music bass: +/-10dB,100HZ Music treble: +/-10dB,10KHZ MIC bass: +/-10dB,100HZ MIC treble: +/-10dB,10KHZ Signal noise ratio: 96dB Total harmonic distortion: 0.03% demensions(WHD): 430×145×370MM Power supply: 220V/50Hz 60Hz±10%