... classD power amplifiers have three ranges: one channel, two channel and four channels, each channel, s rated power have options of 120W, ... design, separate power supply and cooling system for each channel * Sleep mode automatically enabled when no signal is ... Output (balance) Distortion <1% (RMS) , 1KHzNoise Ratio ≥85dB Channel Audio Output Frequency 40Hz~20KHz, 0dB, -3dB, 100VProtection Over temp ...