Tx-nr646 Firmware Update -

, but the final updates remain available on their legacy product page. Always download firmware directly from Onkyo’s website – avoid third-party sites. Last checked: Onkyo still hosts TX-NR646 firmware at their support portal under "Archived Products." If the official page is inaccessible, use the USB method with known-good file hashes from AV community forums.

  • Alberta Address:
    330 5th Avenue SW
    Suite 1800, Calgary
    Alberta, T2P 0L4, Canada
  • British Columbia Address:
    1500 West Georgia, Suite 1300
    Vancouver, British Columbia
    V6G 2Z6, Canada
  • Mailing Address:
    1520,240-70 Shawville Blvd SE
    Calgary AB, Calgary
    T2Y 2Z3
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