Why Check Stereo Channels
Stereo sound uses two channels. If one is weak or missing, music loses its depth and videos sound off. This test sends a clean tone to one side at a time using a stereo panner so you can identify the problem.
How to Run the Test
- Put on headphones or position speakers correctly.
- Press the Left button and note what you hear.
- Press Right and compare.
- Press Both and check the tone sits in the center.
Common Causes of Imbalance
Earwax or dust in a headphone mesh, a bent plug, a loose connector, or the system balance set to one side. On Bluetooth devices, a re-pair often fixes it. Wired headphones may need a clean jack. See how headphones work.
Next Steps
Try our headphone test, general speaker test and low volume fix.
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Frequently Asked Questions
Why is my left earbud quieter?
Usually dust or wax in the mesh, or a Bluetooth connection fault.
Does this work on Bluetooth speakers?
Yes if the speaker supports stereo.
Can balance be set in my phone?
Yes, in accessibility audio settings.
Why are both channels silent?
Check volume, mute and the output device.