Left front view of the Sony SRS XB31 speaker.

Sony SRS XB31 Factory Reset Instructions

We offer here our Sony SRS XB31 factory reset instructions, to return this Bluetooth speaker to its out-of-the-box settings.  Resetting to factory default state restores the XB31 to a fresh, known-good state. Plus, it erases any earlier paired Bluetooth devices from its memory. Deleting these stops this speaker from pairing to any nearby Bluetooth devices. Also, you might factory reset to get it ready for sale or re-gifting, or to stop it from pairing wirelessly with devices you no longer wish it to connect with.

Sony SRS XB31 Factory Reset, Step by Step Instructions

1. Turn the XB31 ON

Press and release the Power button for a half-second or so. Find the Power button as shown in the next picture.

Picture of the -Power- button on the Sony SRS XB31 speaker. Sony SRS XB31 Factory Reset.
Sony SRS XB31 speaker -Power- button.

Find the Power button, as shown in the last picture above.

Then, the status light comes on, as shown next.

Picture of the -Power- lamp glowing.
The -Power- lamp glowing.

The speaker may make a ding-dong tone sound when it powers up, to announce that it has paired, should it connect to a nearby device. Or it may make no sound whatsoever if it does not.  But whether the unit pairs or not, this factory reset procedure works the same way, as follows.

2. Press and Hold the Power and Volume DOWN Buttons Together

Find these buttons as shown next.  They are both on the top button panel, as we point out in the next picture.

Picture of the Volume DOWN and Power buttons.
The Volume DOWN and Power buttons.

The XB31 then enters the factory reset process.

Then after around five seconds, the speaker powers OFF, and the status lamp goes dark, as shown next. So release the buttons at this point. Note that on the SRS XB31, there is no power-down sound.

Picture of the dark -Power- lamp.
The -Power- lamp dark.

3. Check that your Sony SRS XB31 Speaker Did Indeed Factory Reset

Next, power on the unit again, as detailed in step 1 above.

Note that after factory reset, the XB31 comes up in pairing mode. The Pairing Mode lamp quickly flashes blue to let you know this. E.g. See this in the next picture.

Picture of the Bluetooth Status lamp glowing.
The Bluetooth Status lamp glowing.

This is a signal that you may then look for this speaker on a nearby BT device, and pair to it if you so desire.

4. Done with Sony SRS XB31 Factory Reset !

The factory reset is now finished. So you may now sell or gift the speaker, or pair it again with your favorite Bluetooth devices.

After a factory reset, the XB31 no longer automatically connects with any Bluetooth device. So to restore auto linking, you first pair it manually with a device. Then after that, any time that both speaker and that device have Bluetooth turned on, and are in range, pairing automatically occurs  once more.

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Other Posts About the Sony SRS XB31

    1. How to Connect Sony SRS XB31 to iPhone
    2. Sony SRS XB31 Button Meanings Explained
    3. How to Check XB31 Battery Life
    4. How to Make the XB31 Discoverable
    5. Putting the Sony SRS XB31 Speaker into Pairing Mode

References for Sony SRS XB31 Factory Reset

    1. Sony SRS XB31 Bluetooth Wireless Speaker Product Page at Sony.com

Revision History

    • 2021-10-05: First published.