... series classD power amplifiers have three ranges: one channel, two channel and four channels, each channel, s rated power have options of 120W ... , 5.6A, 8A, 12A DC PowerVoltage24V DC, ±20%Max Current 6.5A, 13A, 18A, 25A, 13A, 26A, 36A, 50A, 19.5A ... ~20KHz Audio Output (balance) Distortion <1% (RMS) , 1KHzNoise Ratio ≥85dB Channel Audio Output Frequency 40Hz~20KHz, 0dB, -3dB, 100VProtection Over temp ...