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Txnr646 Firmware Update 2021 'link' Access

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

, finding specific firmware updates released in 2021 is challenging because this model has largely reached its end-of-life for major software support. However, there is some key information regarding its final known updates and related maintenance you should know. Current Firmware Status

Latest Known Version: The most recent official firmware version reported for the is 1110-6060-1106, which was released in December 2020. Key Fixes in Final Updates: Expanded DTS:X playable content. Improved stability for DSD playback.

Resolved audio drop-out issues during Play/Pause/FF/FR on certain DVRs/STBs. Minor bug fixes and general stability improvements. Update Recommendations

If you are looking for content to improve your receiver's performance today, consider these actions:

Check Your Current Version: Use the remote to go to Setup > Miscellaneous > Firmware Update to see your version. If it’s older than 1110-6060-1106, you should update. USB vs. Network Update: For older models like the txnr646 firmware update 2021

, a USB update is often more reliable than a network update to avoid "bricking" the device during the process. Troubleshooting Tips (2021 & Beyond):

WiFi/AirPlay Issues: Many users have reported flaky network features. If your firmware is current and issues persist, a factory reset (hold CBL/SAT + On/Off) can sometimes clear persistent bugs.

HDMI Stability: If you experience signal loss, try disabling "Deep Color" settings in the receiver's menu to improve compatibility with newer 4K devices. Why 2021?

While newer models (like the TX-NR696 or TX-RZ50) received updates in 2021 for things like TIDAL security logins or Chromecast authentication, those specific patches were generally not back-ported to the TX-NR696 - Firmware Updates – Onkyo Product Support

Should You Install It in 2024 or later?

If you are still using a TX-NR646 today (2024/2025) and have never updated past 2019 firmware, the 2021 update is still worth installing, but with caveats: For the Onkyo TX-NR646 Go to product viewer

Important note: Onkyo’s official firmware download pages for the TX-NR646 went offline in late 2022 after the company’s restructuring. As of 2024, the 2021 firmware files are only available via third-party archives (e.g., Internet Archive’s Wayback Machine or user-shared Google Drive links). Proceed with caution and verify MD5 checksums when possible.

Key Firmware Version Numbers for the 2021 Update

When researching the txnr646 firmware update 2021, you’ll encounter several version designations. The main release that rolled out between December 2020 and March 2021 is:

Note: Older firmware versions like 21100-11000-1200 (from 2019) are missing many of the 2021 patches.

You can check your current version by pressing HOME on the remote → going to Setup → Miscellaneous → Firmware Update → Version.

If your main firmware number is lower than 21110-11010-1210, you are eligible for the 2021 update. Should You Install It in 2024 or later

How to Update (Two Methods)

There are two ways to update the firmware on the TX-NR646. Method A is preferred if your receiver is connected to the internet.

How to Check Your Current Version

Before updating, check your firmware version via the on-screen display:

  1. Press the Setup button on your remote.
  2. Navigate to Hardware Setup → Firmware Update.
  3. Select Version.

If your version is lower than 1091-1010-0000-0010, the 2021 update applies to you.

4. General System

What Was New in the 2021 Release?

By 2021, the TX-NR646 was no longer receiving new features (like HDR10+ or VRR, which the hardware doesn't support). However, this update focused on system stability and network security.