Firmware Updates


Notice of Firmware Update for TX-NR555

A firmware update for the TX-NR555 network A/V receiver is available through the unit's USB input. The latest update includes the following content:

Latest Firmware Number (16 digits):2139-9050-7090-0010

As of 18 December 2018

  • Minor bug fixes and improvements stability.

As of 21 August 2018

  • Enhanced security.
  • Adds support for Deezer HiFi.
  • Depending on the Firmware version, update will be needed 2 times.

As of 5 June 2018

  • Improvement of audio output when playback certain Dolby Digital Plus contents.
  • Minor bug fixes and improvements stability.

As of 4 April 2018

  • Improve the noise during playback via USB/Network

As of 31 January 2018

  • Minor bug fixes and improvements stability.

As of 18 December 2017

  • Adds support for pass-through function of Dolby Vision signal.
    This particular firmware update is only available via USB installation.

As of 30 October 2017

As of 31 August 2017

  • Expand playable content of DTS:X.
  • Adds ‘’Play Queue’’ function.
    For detail about updated function, please refer to the link below.
  • Adds ‘’Search/ Sort’’ function on Music server.
  • Adds "Display WAV file information ( album art, artist, album ) via USB" function.
    For detail about updated function, please refer to the link below.
    *Additional functions depend on model.
  • Minor bug fixes and improvements stability.

As of 23 February 2017

  • Adds support for FireConnect.
    This update will enable streaming from Network Services/USB/Bluetooth/Music server.
    *Sampling rates of 44.1 kHz and 48 kHz are supported.(USB/Music server)
    *Onkyo Controller App is required to enjoy FireConnect.
  • Minor bug fixes and performance improvements.
  • *Note for Bluetooth pairing. If Bluetooth devices were previously paired, you must pair the devices again after the Firmware update is complete.

As of 10 November 2016

  • Minor bug fixes and performance improvements.

As of 31 August 2016

  • Adds support of DTS:X.
  • Notes: If you have already done the AccuEQ Room Calibration, have to done it again after this updating.
  • Adds support of TIDAL and Deezer.

As of 19 April 2016

  • To improve the network connectivity with some dual-band wireless routers.

As of 1 April 2016

  • Several improvement of functionality.

How to Check if Your Firmware Version is Up To Date

To Check if your firmware is up to date, go into Home Menu ->Firmware Update and check the 12-digit number (xxxx-xxxx-xxxx). If any numbers differ from the latest version available, please update your unit.

Precautions for TX-NR555 Firmware Update

  • Please read the update instructions carefully before beginning.
  • The firmware update should take 30 to 40 minutes. Once the update begins, don't turn off the power supply to the A/V receiver until it is time to restart it.
  • Depending on the conditions of the network, a firmware update via a network may take more than one hour or even fail to finish. If the update is not completed within two hours, turn off the power supply by pushing the ON/STANDBY button and then try updating again from the beginning.
  • Updating the firmware and adjusting the settings will be done automatically, but may take some time to complete. Please follow the procedures as instructed when you update. Note that the update may fail, or cause problems for your A/V receiver, if you do any of the following:
  • Pull out the A/V receiver's power cord;
  • Interrupt the power supply to the A/V receiver (e.g. if the breaker is tripped or if there is an electrical outage);
  • Insert or remove the LAN cable from a device in your network when updating over a network;
  • Insert or remove a USB memory device from the A/V receiver when updating via USB;
  • Operate components connected to the A/V receiver via HDMI, such as a TV or a recording device.

If your A/V receiver is damaged for any of the reasons above, an Onkyo service center will repair the unit for a fee.

How to Install Firmware Update for TX-NR555

Click below for instructions on how to install the update.

Click below to download the firmware update to your PC, for subsequent installation on your receiver via its USB port.

Please click here for the details about Open Source Software.