Tools needed: 1 empty U disk with a capacity of less than 32G
The operation is as follows:
1:Put the file “XY692X.BFU” to the U disk.
2:Turn on the amplifier, plug in the power, and connect the speakers.
Insert the U disk.
After the upgrade is successful, there will be a "ding-ding" sound.
The process takes about 8 seconds.
3: After the upgrade is complete, unplug the U disk and reboot.
Note: Please format your U disk after the upgrade is complete, otherwise it will affect your other devices.