is , released on December 1, 2020. Although 2021 did not see a new version number for this specific model, updates for similar models in early 2021 fixed critical security and stability issues that users of the 646 were encouraged to verify against their own hardware. Version 1110-6060-1106 (Dec 2020):
2130-1010-0200 (or 2130-1010-0100 ). If you see anything lower than 2110-... (e.g., 2080-... ), you are on outdated 2019–2020 firmware and should update immediately. txnr646 firmware update 2021
: Included previous minor bug fixes and performance improvements to the internal 32-bit DSP engine. How to Perform the Update is , released on December 1, 2020
was released on , and served as the baseline for 2021 . This update was critical for stability, addressing: If you see anything lower than 2110-
You can update your TX-NR646 via a stable network connection or a USB drive.