... 4 channel power amplifiers are class D amplifier of digital signal transmission. DescriptionThis range of 4 channel power ... selection different speaker matching. Master volume controls for each control are included. Complete protection includes peak, short circuit, ... than 0.1% at 1KHz, 1/3 rated powerControlsPower switch, volume controlIndicatorsPower, clip , signal, protectProtectionAC fuse, short- ...