* Digital decoding amplifier board
* Efficiency Class D amplifier
* Built-in digital decoder to decode network audio directly
* Support disconnected local emergency audio input broadcast
* Loop state detection for output zones
* Support the backup mode of 4-main-1-standby, 5 amplifier boards
* Support the real-time indication of the working state of the amplifier board
* Support automatic switching of amplifier board failure
* Support uninterrupted maintenance and repair, and use the start-stop function on the module