Applicable Model

This information is for the following models:

  • SRS-XB402G

About this download

Benefits and Improvements

  • Improves secure communication

IMPORTANT: This firmware update must be performed in order to keep using the Chromecast built-in music distribution service. It will be automatically installed at a time when there is an active network connection available, and the device is not being used.

Previous Benefits and Improvements

The following benefits and improvements are also included in this update.

  • Improves secure communication
  • Modifies the Google Home app setup protocol

File Info

File Name

  • Firmware update 125422062 for SRS-XB402G

File Version

  • 125422062

File Size

  • 118 MB (123 801 600 bytes)

Release Date

  • 03-14-2023


Check the firmware version

If the version is displayed as 97072057 or lower, we strongly recommend updating the firmware. If you're not sure, it's easy to check which version of firmware you have:

  1. Using the Google Home application connect the Wireless Speaker to the same Wi-Fi network as your smartphone.
  2. Start up the Google Home application on your smartphone.
  3. Select the Home icon.
    There is a [HOME] icon at the bottom left of the Google Home application screen.
  4. Select the device icon for the SRS-XB402G.
    A device icon will appear in the center of the Google Home application screen.
  5. Click the device Settings icon.
    There is a Settings icon on the top right of the Google Home application screen.
  6. The system firmware version will appear in the Information category.
    The Device Settings screen is displayed, and the system firmware version is displayed in the Information category at the bottom of the screen.

Download & Install

The software of the Wireless Speaker will be automatically updated to the latest version while connected to the Internet via a Wi-Fi network. A new software update will be delivered from time to time when new features become available or an update is required for improved use.

Important Notice

  • You cannot disable the automatic software update.
  • Previous versions of the software cannot be retrieved.
  • Do not turn off the Wireless Speaker while it is updating. The Wireless Speaker may not be operational while updating.
  • To use the Wireless Speaker, a Wi-Fi connection and a Google Account are necessary, and you will need to consent to Google's Terms of Use and/or Privacy Policy.
  • By using this product, an agreement with Sony's EULA is necessary.
  • The software for the Wireless Speaker is automatically updated from time to time, and you cannot choose or refuse to download this automatically-updated software.
  • During the update, the status indicator (Google Assistant) will flash in blue or purple as the software of your Wireless Speaker is being downloaded and/or installed.
    Note: Wait until the status indicator (Google Assistant) stops flashing before attempting to use the Wireless Speaker.