... 150W 2, USB playing it, radio station, SD card. 3, Short circuit, overload. ModelRated powerOutput modeInput sensitivityS/n ratioFred ResponsePower ... .1.150W2.USB playing it, radio station, SD card.3.Short circuit. over-loading circuit. hot circuit.1.Directly ... , provide adequate warm-up time for amplifier or other equipments.4.Power control: automatically power on amplifier or other equipments when ...