The front right view of the Sony SRS XB21 speaker.

How to Factory Reset Sony SRS XB21

Show you how to factory reset your Sony SRS XB21 Extra Bass wireless speaker to its default settings.  Factory resetting restores this version of the XB series speaker to its default state. Plus, factory resetting erases any earlier paired Bluetooth devices from memory. Then this clearing 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.

How to Factory Reset Sony SRS XB21, Step by Step

1. Turn the Speaker ON

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

The -Power- button on the Sony SRS XB21 speaker. How to Factory Reset Sony SRS XB21.
Sony SRS XB21 -Power- button.

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

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

The glowing -Power- light on the speaker.
The speaker’s -Power- lamp glowing.

The speaker may make a ding-dong tone sound when it powers up, should it connect to a nearby device. Or it may make no noise at all if it does not.  Whether the unit pairs or not though, this reset routine 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 -Power- and -Volume DOWN- buttons.
The -Power- and -Volume Down- buttons.

The XB21 then enters factory reset mode.

Then after a mini pause, the unit powers OFF, and the Power lamp goes dark, as shown next. Note that on the SRS XB21, there is no shutdown sound.

The dark -Power- lamp on the Sony SRS XB21 speaker.
Sony SRS XB21 -Power- lamp dark.

3. Check that your Sony SRS XB21 Did Indeed Factory Reset

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

Note that after reset, the XB21 comes up in discovery mode. The Pairing Mode lamp flashes white rapidly to let you know this.

The glowing -Bluetooth Status- light.
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 How to Factory Reset Sony SRS XB21 !

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

After a factory reset, the XB21 no longer automatically syncs with any previously paired Bluetooth device. Thus, to restore auto linking, you manually pair it with a device. Then after that, any time that both speaker and that device have Bluetooth activated, and they’re near to each other, pairing would automatically take place once more.

Related Posts to How to Factory Reset Sony SRS XB21

    1. How to Factory Reset Sony SRS XB12 Portable Speaker
    2. How to Factory Reset the Sony SRS XB10 Speaker
    3. Factory Resetting the Sony SRS XB13 Mini Speaker
    4. How to Factory Reset Sony SRS XB43 Wireless Speaker
    5. Factory Resetting the Amazon Echo Dot 3rd Generation Smart Speaker

Other Posts About the Sony SRS XB21

    1. Sony SRS XB21 Pairing Instructions
    2. How to Tell if Sony SRS XB21 is Charging
    3. How to Connect Sony SRS XB21 to iPhone
    4. Sony SRS XB21 Battery Indicator Explained
    5. How to Check Battery Life on the Sony SRS XB21 Speaker

References for How to Factory Reset Sony SRS XB21

    1. Sony SRS XB21 Bluetooth Speaker Product Page at

Revision History

    • 2021-09-23: First published.