Online Stereo Speaker Test
Play a quiet test tone through either stereo channel or both.
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Check stereo channel routing
Select Left or Right and press Start test to hear a sine tone in that channel. Both sends the same tone to both channels. Start quietly and confirm the correct speaker or headphone side responds. Stop before changing the channel or frequency, then start again.
What a speaker test can tell you
This check helps identify swapped channels, disconnected speakers and unexpected mono routing. Device accessibility settings, Bluetooth profiles or audio interfaces can mix channels before they reach your speakers. It is a routing check, rather than a speaker calibration or frequency-response measurement.
Using the Stereo Speaker Test
Check whether left and right playback reaches the expected speaker or headphone side. Start quietly, especially when using headphones.
Instructions
- Select Channel, choose Test frequency (Hz) and set a low Playback level.
- Press Start test and check which side you hear. Press Stop when you have checked it.
- Change to the other channel and start again. Both sends the same tone to both sides.
Checking the left and right channels
Left should come from your left speaker or headphone side, and Right from the right. If both choices sound centered, a mono setting or output device may be combining the channels. Both is useful for checking that neither side is silent, but it is not a stereo music sample.
What to do if the tone plays on the wrong side
- Check speaker cables and which way you are wearing your headphones. A swapped connection can reverse the sides.
- Check accessibility mono-audio settings and interface routing if both channels appear on both sides.
- Changing frequency, channel or level stops the test. Press Start test again and check the selected output device.
This is a routing check. It does not calibrate speakers, measure their frequency response or establish whether two sides have equal loudness.
