Picture of an iPhone with a Sony SRS XB33 speaker.

Sony SRS XB33 Firmware Update Instructions

Here, we detail the firmware update procedure for the Sony SRS XB33 Bluetooth speaker. This routine can take ten (10) to fifteen (15) minutes depending on the speed of your internet connection, source device used to update the speaker, distance between speaker and that device, Etc. Plus, you cannot roll back the update once you install it. That is, you’ll be unable to return to the prior firmware version after you finish this upgrade. So, be sure that you indeed want the update, and have thought through all ramifications before proceeding.

Prepare for Sony SRS XB33 Firmware Update

You’ll need the following items:

    • High speed internet connection,
    • Bluetooth enabled mobile device,
    • The Sony Music Center app that runs on said mobile device,
    • the Sony SRS XB33 BT speaker you’re updating.
    • Compatible power adapters and charge cables for your speaker and mobile device.

Summary for Sony SRS XB33 Firmware Update Directions

Next, do the following to update the speaker. In short…

    1. Connect your mobile device to the internet.  We suggest using Wi Fi for this work, and not your cellular connection.
    2. Install the Sony Music Center app if you haven’t already.
    3. Then, plug your XB33 and your mobile device to AC power. Why? Because we don’t want either of their batteries going dead while updating the firmware. In fact, a low battery could leave a corrupted version of the firmware in the speaker’s memory. This could, and probably would in all likelihood, brick the speaker. This would then likely render the unit useless and non repairable. So once again, connect the speaker to power before proceeding.  Please !
    4. Disconnect any other Bluetooth speakers and devices from your mobile device for this process.
    5. Then, power up your speaker and mobile device, if not already running.
    6. Next, pair your mobile device with the XB33.
    7. Run the Sony Music Center app. The app should then find your speaker and display the home screen for the 33, showing that a firmware update is available.
    8. Follow the on-screen instructions for firmware updating.




Sony SRS XB33 Firmware Update, Step by Step Details

1. Connect the XB33 and your Mobile Device to AC Power

We connected ours to an AC outlet using a common USB power supply, as well as a common micro USB to USB-A cable. E.g. See this in the next picture.

Picture of the Sony SRS XB33 speaker, connected to charger and charging.
The Sony SRS XB33 speaker, connected to charger and charging.

You’ll know that the speaker is receiving external power if you see the charging light glowing orange.

2. Pair this Bluetooth Speaker with your Mobile Device

Connect the speaker to your phone / tablet where you will run the update. Here’s an example screenshot of the XB33 connected to an iPad.

Screenshot of the iPadOS -Bluetooth Settings- page, showing the Sony SRS XB33 speaker as Connected.
iPadOS -Bluetooth Settings- page, showing the Sony SRS XB33 speaker as Connected.

Now keep both the speaker and your mobile device powered up and close to each other throughout the update, lest the update fail and result in a malfunctioning speaker.

3. Find the Sony Music Center App on your Mobile Device

We made a folder for all of Bluetooth speaker apps and put the Sony Music Center app in there on our test iPad, as you see in the next picture.

Screenshot of the Sony Music Center app icon on iPadOS.
The Sony Music Center app icon on iPadOS.

4. Run the Sony Music Center App to Continue with the Sony SRS XB33 Firmware Update

As the app runs, it scans the host device running it for compatible Sony speakers.  Wo, the app needs a brief period to find the XB 33. But eventually, it does so, and displays its status screen, as we show  next.

If the speaker does not appear in the app after thirty seconds or so, move it closer to your mobile device. Next, close the Music Center app, and then run it again.

Note the tan bar on the XB33’s home screen.  This appears only when a firmware update is available for this speaker.

Screenshot of the Sony Music Center app, displaying the SRS XB33 Home page with a speaker update available, showing the More Info button.
Sony Music Center app, displaying the SRS XB33 Home page with a speaker update available, showing the More Info button.

Note that if there are no firmware updates pending for the 33, then you will see no brown bar. This situation we show in the next picture.

Screenshot of the Sony Music Center app, showing the SRS XB33 speaker Home page.
The Sony Music Center app, showing the SRS XB33 speaker Home page.

5. Tap the More Info Button Inside the Brown Update Bar

Tapping the More Info button brings up the Software Information screen, as follows.

Screenshot of the software information page for version 4800 of the Sony SRS XB43 firmware.
The software information page for version 4800 of the Sony SRS XB43 firmware.

6. Tap the OK Button

Tapping the OK button may bring up the following screen if you haven’t followed the above directions, and plugged your speaker into external power.

Screenshot of the Connect Speaker to Power Supply Window in Sony Music Center app on iPadOS.
The Connect Speaker to Power Supply Window in Sony Music Center app on iPadOS.

You might also get the following screen, even though you do indeed have the speaker connected to AC power.

Screenshot of the Insufficient Battery Power window in Sony Music Center app on iPadOS.
The Insufficient Battery Power window in Sony Music Center app on iPadOS.

This happens when the speaker has too little battery reserve power to complete the update should a power failure occur while you update. In fact, we suggest that you fully charge both speaker and the smart device before proceeding with this update.  Doing so protects your XB33 speaker from a corrupt firmware upload in the event of a longer power outage, where the batteries could go dead before firmware updating is complete.  Also, as a further safety measure, once you fully recharge both devices, please leave both of them connected to external power until the update finishes.  Finally, it prevents messages like the two above from appearing.

So, once both the speaker and smart device are charged, tap the OK button on the Connect Speaker to Power Supply   window. That should then take you back to the previous page once again, as follows.

Screenshot of the software information page for version 4800 of the Sony SRS XB43 firmware in the Sony Music Center App on iPadOS.
The software information page for version 4800 of the Sony SRS XB43 firmware in the Sony Music Center App on iPadOS.

Or, if you quit the app, go ahead and restart it and repeat the above steps.  This time, you should not get the Connect Speaker to Power Supply page. But instead, you will see the Software Information page that we see in the last picture.





7. Updating Firmware on the Sony SRS XB33 Begins

The updating then starts, as we show in the following screenshots. The Music Center app first downloads the new firmware package.

Screenshot of the Sony Music Center app downloading the new firmware, and at 6 percent done.
The Sony Music Center app downloading the new firmware, and at 6 percent done.

Once the app downloads the package, it unpacks and transfers it to the XB33 as the next pictures show.

Additionally, during the transfer to the speaker, the Power lamp on the speaker’s top flashes green in groups of four pulses then a pause.  E.g. Pulse-pulse-pulse-pulse-pause, pulse-pulse-pulse-pulse-pause,…  During this time, all other lamps on the speaker are OFF.

Picture of the Sony SRS XB33 speaker -Power- lamp lit up.
Sony SRS XB33 speaker -Power- lamp lit up.

7a. Updating the Firmware Continues at Thirty Percent Complete

Now as shown in these screenshots, the Sony Music Center app displays a  progress line, that gradually gets more brown as the firmware updating proceeds.

Screenshot of the Sony Music Center app downloading the new firmware, and at 30 percent done, on iPadOS.
The Sony Music Center app downloading the new firmware, and at 30 percent done, on iPadOS.

7b. Updating Firmware on Sony SRS XB33 is Now at Seventy Percent Complete

Screenshot of the Sony Music Center app transferring the new firmware to the speaker, and at 70 percent done, on iPadOS.
The Sony Music Center app transferring the new firmware to the speaker, and at 70 percent done, on iPadOS.

Now we’re probably about five minutes into the update. Indeed this process takes a relatively short time as compared to some of the other speaker models we’ve tested.

7c. Now at Ninety-Nine Percent Done

The next screen shows that the firmware transfer and update to the speaker have almost finished (99 percent done). E.g. The progress bar is practically all brown now.

Screenshot of the Sony Music Center app transferring the software to the speaker, and at 99 percent done.
The Sony Music Center app transferring the software to the speaker, and at 99 percent done.

7d. Firmware Update on the XB33 Begins

Now that the firmware has been transferred from your device to the speaker, the update process on the 33 starts when you see this page.

Screenshot of the Sony Music Center app displaying the Software Update Has Started page on iPadOS. The OK button is highlighted.
The Sony Music Center app displaying the Software Update Has Started page on iPadOS. The OK button is highlighted.

7e Tap the OK Button

Touching the OK button takes you to the Speaker & Group page, where you see a list of previously connected speakers that the app knows about.  Note that all are grayed out.  So none are connected to the app during the XB33 update process.

Screenshot of the Sony Music Center app, showing the devices list page with no devices currently connected to it.
The Sony Music Center app, showing the devices list page with no devices currently connected to it.

8. Wait for the Sony SRS XB33 to Shut OFF After Updating its Firmware

While the speaker updates itself, its Power lamp flashes green.

Picture of the Sony SRS XB33 speaker -Power- lamp blinking.
Sony SRS XB33 speaker -Power- lamp flashing.

Then after a minute or two, once the 33 finishes updating, the Power light goes dark.  No more blinking.

The dark -Power- light on the Sony SRS XB33 speaker.
Sony SRS XB33 dark -Power- lamp.

9. Press the Power Button To Boot the Speaker Again

Press the Power button to turn this 33 on again, as pictured next.

The -Power- button on the Sony SRS XB33 speaker.
Sony SRS XB33 speaker -Power- button.

The XB33 should again pair with your mobile device where you’re running the Sony Music Center app. The Power light turns solid green, and the Pairing lamp also glows steadily blue once the speaker has again linked to your mobile device.

The glowing -Bluetooth Status- light on the Sony SRS XB33 speaker.
Sony SRS XB33 -Bluetooth Status- lamp glowing.

Now after the XB33 reconnects to your smart device, the Sony Music Center app discovers that your speaker has come back online, and thus, displays an update-complete message, as follows.

Screenshot of the Sony Music Center app on iPadOS, displaying the Software 4800 update on the SRS XB33 speaker is complete, with the OK button highlighted.
The Sony Music Center app on iPadOS, displaying the Software 4800 update on the SRS XB33 speaker is complete, with the OK button highlighted.

10. Press the OK Button Back in the Sony Music Center App

With your speaker successfully paired to the app again, press the  OK button, as shown in the last screenshot.

The app then displays the Sony SRS XB33 home screen once again. But this time, note that there’s no longer the brown bar, as we see next. This means that the updating of the firmware worked, and that the speaker is now running the current firmware version.

Screenshot of the Sony Music Center app, showing the SRS XB43 speaker Home page.
The Sony Music Center app, showing the SRS XB43 speaker Home page.

11. Done with Updating the Firmware on the Sony SRS XB33 Speaker !

You’re now finished updating the firmware to the current version in your Sony SRS XB33 BT speaker. Enjoy the new features.

Related Posts to Sony SRS XB33 Firmware Update

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Other Posts About the Sony SRS XB33 Wireless Party Speaker

    1. Sony SRS XB33 Battery Life, How Much Playtime Left
    2. How to Connect Sony SRS XB33 Speaker to an Alexa Smart Assistant
    3. Sony XB33 RMS Watts Output, Battery AC Adapter…
    4. Sony SRS XB33 How to Power Up
    5. How to Pair the XB33 to an iPhone

References

    1. Sony SRS XB33 Party Bluetooth Speaker Product Page on Sony.com

Revision History

    • 2022-09-06: First published.
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