This is the 42U audio and video cabinet equipment rack diagram, mixer, power amplifier, etc. Use the picture of the machine room cabinet as a label. The installation interfaces include wireless microphone, central control, switch, power sequencer, Huawei VIEWPOINT, DVD, reserved equipment space for Party A, mixer, line multiplier, VGA matrix, AV matrix, conference host , Power amplifier 1, power amplifier 2, redundant space.