Denon Avr-x520bt Firmware Update Review

Before starting an update, verify if one is actually needed.

On the remote, press and select General > Firmware > Update Start . Denon Avr-x520bt Firmware Update

: Some updates may reset your settings to factory defaults. It is recommended to note your speaker and input configurations before starting. Troubleshooting & Maintenance Before starting an update, verify if one is actually needed