Date of Analysis: October 2023 (Retrospective deep-dive on 2021 updates) Target Device: Onkyo TX-NR646 (A/V Receiver)
Without this update, your TX-NR646 will likely drop video signals with a PS5 or fail to display Dolby Vision from a new Chromecast. With the update, the unit runs quietly (fan logic improved), switches inputs faster, and supports the core features that matter.
Need the direct download link for the 2021 firmware? Check the official Onkyo support page or your regional distributor’s legacy firmware archive. txnr646 firmware update 2021, Onkyo TX-NR646 2021 patch, TX-NR646 Dolby Vision fix, Onkyo firmware 2130-1010-0200, update TX-NR646 via USB.