Denon AVR-X520BT Go to product viewer dialog for this item. is a unique model in the X-series because it lacks a built-in network connection. This means you cannot update it via Wi-Fi or Ethernet; updates must be performed exclusively via . 🛠️ How to Update Your Firmware

You use HDMI ARC, Bluetooth streaming, a PS5, an Xbox, or any 4K HDR source.

: Connect the USB drive directly to the unit; the receiver will not recognize devices connected through a USB hub.

: Never turn off the power while "Update" is displayed.

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