Txnr646 Firmware Update 2021 !link! May 2026

The Onkyo TX-NR646 Go to product viewer dialog for this item.

: Resolved an issue where users were unable to change customer settings within the web-based setup menu. Sirius XM Support txnr646 firmware update 2021

HDMI compatibility: Newer 4K/120Hz sources (though the TX-NR646 is limited to 4K/60Hz) still benefit from the HDCP fixes.

Security: The WPA2 patch is critical if you use Wi-Fi or AirPlay.

Resale value: A fully updated receiver commands a higher price on eBay/Facebook Marketplace.

Stability: Many users report that the 2021 update was the “final stable release” – no subsequent updates have been needed.

Prepare Drive: Download the zipped firmware from the Onkyo Support Site. The Onkyo TX-NR646 Go to product viewer dialog

Method 2: Network Update (Wi-Fi/Ethernet)

Only if your receiver is still connected to the internet and you see a notification. Prepare Drive : Download the zipped firmware from