On Windows 11 this usually happens when each earbud is paired separately instead of as a single stereo device, or when Windows is set to mono/imbalanced audio.
Try these steps in order:
- Check balance and mono settings
- Select Start > Settings > System > Sound.
- Under Output, select the Bluetooth earbuds.
- In Output settings, select Volume and make sure Left and Right are set to the same level (for example, both 100).
- Still in Sound, turn Mono audio off so Windows uses stereo.
- Verify stereo audio format
- In Settings > System > Sound, under Output, select the Bluetooth earbuds.
- In Output settings, under Format, select 2 channels, 16 bit, 48000Hz (DVD Quality).
- Remove all existing entries for the earbuds and re-pair as a set
- Put both earbuds in their charging case.
- Select Start > Settings > Bluetooth & devices > Devices.
- In the Audio section, select each entry related to the earbuds, choose Disconnect (if shown), then Remove device.
- Follow the manufacturer’s instructions to put the earbuds as a pair into pairing mode (usually: both in the case, lid open, hold the case button until the LED flashes).
- In Bluetooth & devices, select Add device > Bluetooth, wait for the earbuds to appear once as a single audio device, and select them.
- If Windows prompts to connect a second earbud or speaker, choose the option to connect it so they work as a stereo pair.
- Test with another Bluetooth audio device
- Connect a different Bluetooth headset or speaker to the same PC.
- If stereo works correctly on the other device, the original earbuds may not be pairing correctly as a stereo set or may be faulty.
If the problem persists with multiple devices, update Bluetooth drivers and Windows, then repeat the remove/re-pair steps.
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