The most recent official firmware update released specifically for the Onkyo TX-NR646 was issued on December 1, 2020 (Firmware Version: 1110-6060-1106
). While no new updates were released in 2021 specifically for this model, many users sought this late 2020 update throughout 2021 to resolve persistent bugs. Update Highlights (Version 1110-6060-1106) Web Setup Fix
: Resolved an issue where users were unable to change customer settings within the web-based setup menu. Sirius XM Support
: Fixed a bug that prevented song information from displaying correctly during Sirius XM radio playback. Stability & Compatibility
: Included cumulative improvements for DTS:X compatibility and general system stability. Key Considerations & Issues 4K HDR Limitations
: Some users reported that after installing recent firmware, the previous "secret" key combination (BD/DVD + Power) to enable HDMI 4K Enhanced
mode no longer worked, potentially affecting 4K HDR passthrough for certain devices. Update Failures : A common issue during the update process is the Error 0-21 , which typically indicates a network failure. strongly recommends using a USB flash drive
for a more reliable installation rather than a wireless connection. Hardware Vulnerability
: Older units may experience "DSP" update hangs (e.g., stopping at 70% or 90%), which can sometimes indicate a failing internal memory chip rather than a software bug. How to Update
It looks like you’re referencing a specific blog post title: "txnr646 firmware update 2021".
I don’t have direct access to live blogs or real-time web browsing, but based on the name:
If you're trying to find or recover that blog post, try:
If you meant a different model number (e.g., TXNR646 from a known brand like Onkyo? Onkyo’s TX-NR series are AV receivers — but no “NR646” exists in their lineup, though there is TX-NR646 — a 2015 model). In that case, a 2021 firmware update would be plausible for bug fixes or HDMI/audio improvements.
Title: The Silent Revolution: A Deep Dive into the TXNR646 2021 Firmware Update
In the landscape of consumer electronics, firmware updates are often mundane affairs—minor bug fixes or compatibility patches that go unnoticed by the average user. However, for owners of the Onkyo TX-NR646 A/V receiver, the firmware update released in 2021 represented a significant milestone. It was not merely a repair; it was a functional resurrection for a device caught in the crossfire of the streaming wars.
To understand the gravity of the 2021 update, one must first understand the context of the hardware. The TX-NR646 was a highly regarded mid-range receiver, praised for its robust power and early adoption of Dolby Atmos and DTS:X. However, as the streaming landscape evolved, the hardware began to show its age—not in audio fidelity, but in connectivity logic. The 2021 firmware addressed this, fundamentally altering the user experience.
Perhaps the most strategic element of the updates
The most significant update for the Onkyo TX-NR646 in the modern era arrived on December 2, 2020
(often referred to in 2021 discussions as the current "latest" version). While Onkyo released updates for newer models throughout 2021, the TX-NR646—a 2015 model—received its final critical maintenance patch at the end of 2020 to address web menu and satellite radio issues. Update Highlights (Version 1.15) Web Setup Fix
: Resolved an issue where users were unable to change customer settings through the web-based setup menu. Sirius XM Integration
: Fixed a bug that prevented song information from being displayed during Sirius XM playback. Cumulative Stability : Includes all previous enhancements, such as improved DSD playback stability and compatibility. Installation Guide For older units like the TX-NR646, USB installation is highly recommended
over Wi-Fi to avoid common network errors (like the "0-21" or "0-04" errors). Preparation
: Format a USB drive to FAT/FAT32. Download the firmware from the official Onkyo support page txnr646 firmware update 2021
and extract the folder's contents directly to the USB root directory. Navigation
: Plug the USB into the receiver. On the front panel or remote, go to 8.1 F/W Update Update via USB . The process typically takes 30 to 40 minutes Completion
power off the unit until "Complete" appears on the front display. Troubleshooting Tips
While there were multiple firmware updates released for Onkyo receivers throughout 2021, the Go to product viewer dialog for this item.
specifically did not receive a new update that year. Its final official firmware release was version 1110-6060-1106 , which arrived on December 1, 2020.
If you are looking for the story of its "2021 status" or how to ensure it is at its final peak performance, here is the detailed breakdown: The Final Chapter: December 2020 Update The last major effort to refine the
occurred just as 2020 ended. This update focused on internal stability and web-based control:
Web Setup Fixes: Resolved an issue where users couldn't change customer settings via the web setup menu.
Metadata Accuracy: Fixed a bug that prevented song information from displaying correctly for Sirius XM radio.
Stability: General minor bug fixes to ensure the receiver remained reliable as a legacy device. Why People Searched in 2021
The search for a "2021 update" likely stems from a wave of updates that Onkyo released for newer models (like the Go to product viewer dialog for this item. Go to product viewer dialog for this item. Go to product viewer dialog for this item.
) throughout that year. These updates addressed evolving streaming standards that the no longer officially supported:
January 2021: Newer models received a TIDAL security enhancement and TuneIn Radio logo fixes. June 2021 : The
added a Klipsch Optimized Mode and expanded Sonos device support. November 2021: Models like the
received a fix for TIDAL FLAC audio converting incorrectly to AAC. How to Confirm Your is Up-to-Date
Even without a 2021 release, you should ensure your unit is running the final 2020 version to avoid issues with AirPlay or WiFi.
Check Version: Press SETUP on the front panel, go to 8. Misc > 8.1 F/W Update, and scroll to find the Version number. The Target: Your version should be 1110-6060-1106.
Update Method: While network updates are possible, Onkyo recommends using a USB drive for a more reliable installation. Format a USB stick to FAT32. Download the firmware from the Onkyo Product Support page.
Extract the files to the root of the USB drive and initiate the update through the receiver's menu. TX-NR646- Owner's Manual - Onkyo Product Support
Based on the model number TXNR646, you are referring to the Onkyo TX-NR646 7.2-Channel Network A/V Receiver.
Here is a helpful guide regarding the firmware updates for this receiver, specifically focusing on the 2021 timeframe and the overall status of the unit.
The txnr646 firmware update 2021 (version 21110-11010-1210) represents the final and most polished software state for the Onkyo TX-NR646. While it doesn’t add headline features like HDMI 2.1, it resolves long-standing audio, video, and network issues that have frustrated owners for years. "txnr646" doesn’t match any widely known consumer router,
If your receiver is still running original or pre-2021 firmware, performing this update is one of the most effective ways to extend its usable life. The process is free, takes under an hour, and dramatically improves reliability with 4K sources, gaming consoles, and streaming apps.
Bottom line: Update your TX-NR646 to the 2021 firmware today—your ears and your HDMI devices will thank you.
Have you performed the txnr646 firmware update 2021? Share your experience in the comments below, or visit the AVSForum TX-NR646 owners’ thread for advanced troubleshooting.
Last updated: 2025 – This guide remains accurate as no further firmware updates have been released for the TX-NR646 after 2021.
While there was no new firmware released specifically in 2021, the final firmware for the Onkyo TX-NR646
(version 1110-6060-1106) was released in December 2020. This update remains the latest version for the receiver and addresses minor bugs while improving overall stability. Pre-Update Checklist
To ensure the update completes successfully, you must perform these steps before starting: Disable HDMI Control: Set "HDMI CEC" (RIHD) to Off. Disable Multi-Zone: Turn off Zone 2.
Stop Playback: Ensure all internet radio, USB, or server content is stopped.
Disconnect Peripheral Control: Turn off any control devices (like a PC) connected via Ethernet. Update Method 1: Via Network (Recommended)
This is the simplest method if your receiver is connected to the internet. Open Setup: Press the [SETTING/GEAR] button on your remote.
Navigate to Update: Go to 7. Miscellaneous (or 8. Misc depending on your current version) → Firmware Update. Select Network: Choose Update via NET and press ENTER.
Note: If the option is grayed out, wait a few minutes for the unit to fully initialize..
Start Update: Select Update and press ENTER. The process takes roughly 20–30 minutes.
Completion: When "Completed!" appears on the front panel, press ON/STANDBY on the main unit to enter standby mode. Method 2: Via USB Drive
Use this method if your receiver has network issues or if you prefer a manual install.
Prepare Drive: Download the zipped firmware from the Onkyo Support Site.
Format and Copy: Unzip the files and copy them to the root folder of a USB stick (do not put them in a subfolder).
Insert Drive: Plug the USB drive into the receiver's USB port.
Run Update: Navigate to 7. Miscellaneous → Firmware Update → Update via USB.
Start and Finish: Press ENTER to start. Once "Completed!" is displayed, remove the USB drive and power the unit off and on. Troubleshooting Tips
Failed Update (Error 1-83): If the update stalls, try unplugging all HDMI video sources and restarting the process. Users have found success after removing these cables during the update.
"No Update" Message: If you see this immediately, your receiver is already running the latest 2020 firmware. An internal or custom device code (e
Verify Version: After updating, check your version by going to Misc → F/W Update and scrolling down to the version number. Firmware Update TX-NR646 & TX-NR747 (12-01-2020) - Onkyo
Onkyo TX-NR646 Go to product viewer dialog for this item. reached its end-of-life for major firmware support in late 2020. The most recent and likely final official update for this model was released on 2 December 2020 (version 1.15). While no new updates were specifically issued in 2021, many users sought this final version during that year to address ongoing stability issues or to ensure compatibility with streaming services like Sirius XM. Latest Firmware Details (December 2020) The final official release for the
is version 1110-6060-1106 (or version 1.15). This update specifically aimed to:
Fix Web Setup Issues: Resolved a bug where customer settings could not be changed via the web setup menu.
Sirius XM Support: Fixed an issue where song information for Sirius XM radio was not displayed correctly.
General Stability: Included cumulative minor bug fixes from previous years, such as improvements to DTS:X compatibility and Dolby Digital Plus playback. How to Update Your
You can update your receiver using two methods. If the "Update via NET" option is greyed out, it typically means your unit is already up to date or has a network connectivity issue. Method 1: Network Update (Wi-Fi or Ethernet)
Connect your receiver to your home network via an Ethernet cable or Wi-Fi. Press Setup on the front panel or the remote.
Navigate to 8. Misc (or 7. Miscellaneous depending on menu version) → Firmware Update. Select Update Via NET and press Enter.
Wait for the message "Completed!" to appear. The unit will automatically enter standby mode after approximately 3 minutes. Method 2: USB Update (Recommended for Stability)
For a more reliable installation, especially if your Wi-Fi is unstable, use a USB flash drive.
Prepare the Drive: Format a USB drive (at least 128 MB) to the FAT file system.
Download & Extract: Download the firmware zip file from the Onkyo Product Support page. Unzip it and copy the contents directly to the root folder of the USB drive. Install: Plug the drive into the receiver's USB port.
Navigate: Go to Setup → Misc → Firmware Update → Update via USB.
Confirm: Select Update and press Enter. Do not turn off the power until the front display reads "Completed!". Common Troubleshooting in 2021 and Beyond Firmware Update TX-NR646 & TX-NR747 (12-01-2020) - Onkyo
Note: The specific model is the Onkyo TX-NR646 (a 7.2-channel network AV receiver released around 2015/2016). By 2021, this device was considered a legacy product, but Onkyo released critical stability and security patches for it.
When performing the txnr646 firmware update 2021, you will land on one specific version depending on when you downloaded it. Onkyo released two minor revisions in 2021:
If your TX-NR646 refuses to update to the 2021 firmware, try these fixes:
You have two methods. Network is recommended for convenience, but USB is more reliable if your Wi-Fi is slow.
It’s important to set realistic expectations. The 2021 update does not add:
If you need those features, you must upgrade to a newer model like the TX-NR696 or TX-NR7100.