The DA-550F is a 4-channel digital power amplifier that offers lightweight, compact, and high-efficiency power output. Provides 550W # 83x 4 channels (4 x # 9b output) using a switching power supply. Each channel is equipped with an independent power section. Its Control / Monitor terminals allow the ON / OFF power control of the individual channels and the monitoring of the status of the ON / OFF power in each channel, the protection in each channel and the operation of the fan. Prepare the control panel or the status monitor screen separately. It can be mounted in an EIA standard equipment rack (2 unit size).