... of 4 channel power amplifiers are class D amplifier of digital signal transmission. DescriptionThis range of 4 channel power amplifiers ... while channel3 with channel2 priority input and channel4 with channel 3 priority input. The phoenix type 100V, 70V and ... than 85 dBTHDLess than 0.1% at 1KHz, 1/3 rated powerControlsPower switch, volume controlIndicatorsPower, clip , signal, protectProtectionAC ...