This post shows how to connect to a Sony speaker from most any common Bluetooth mobile device. Doing so gives you a much bigger, and arguably better sound when you stream music from said device to these speakers. So in this demo, we show how to do this on the Sony SRS XB43 model, but this works in a similar way on most of the other Sony speakers currently on the market.
How to Connect to a Sony Speaker, Step by Step
With your Sony speaker switched OFF (power button is dark), run through these directions to connect to it to most any mobile device that supports Bluetooth. For this demo, we use an iPhone 12 Pro Max cell phone as the source device.
1. Go to the Home Screen on your Source Device
Firstly, press and release the side button (right edge of the phone) and enter your passcode or Face Id to bring up the Home screen.
2. Find the Settings App
We found ours on the second page of the Home screen, as shown next.

3. Bring up the Settings App
Thirdly, tap the Settings app icon.
The smart device then shows the first page of its settings, as shown in the next step.

4. Go to the Bluetooth Option to Continue with How to Connect to a Sony Speaker
Tap the Bluetooth item on the Settings page.
Then you get the Bluetooth Settings screen, as we show next.

Note that our Bluetooth is running here. But since our test Sony speaker (the XB43) is currently powered down (is not in pairing mode). Thus it does not show up in the BT devices list. Also, we don’t see it since we’ve never paired this speaker with this iPhone before.
5. Turn On your Sony Speaker
Turn on the speaker by quickly pressing its Power button. See this, pointed at by the green arrow, in the next picture.

The speaker then powers up, and its status lamp glows, as seen in the next picture.

Also, the Bluetooth lamp will blink in some pattern to show that the speaker is ready to receive a pairing request, as we see in the next picture.

If it blinks evenly, then it’s passively waiting for a connection request to come in.
But if it fast flashes or blinks in a pulse-pulse-pause, pulse-pulse-pause pattern, then it’s broadcasting its pairing information so that other devices can find it. I.e. The speaker is in pairing mode in this case.
Moreover, since our test iPhone does not know about this speaker, this Sony speaker will not pair with it automatically.
6. Put the Sony Speaker into Pairing Mode
Now, to see this speaker on your iPhone, place it into pairing mode if it’s not in that mode already. To do that, press the Pairing button, and release when the unit beeps or speaks that it’s in pairing mode, and the Bluetooth Status lamp begins its rapid or pulse-pulse-pause, pulse-pulse-pause flashing pattern, as we see in the last picture.
7. Find the Speaker on your Mobile Device to Continue with How to Connect to a Sony Speaker
See the screen shot next. We found our speaker, as we point out with the green arrow.

8. Connect with your Sony Speaker
Tap the listed speaker in the Other Devices list.
Our test mobile device then pairs with the test speaker here.
I.e. The iPhone’s Bluetooth Settings screen might then change to look something like the following. Note the now-paired Sony speaker entry, as we point out with the green arrow in the next screenshot.

9. Done with How to Connect to a Sony Speaker !
At last, we have now successfully connected the test speaker with a typical mobile device.