FREE · DEVICE TESTS
Speaker and Headphone Test (Left/Right).
Check left and right channels, bass and full-range sweeps and speaker phase, to find swapped, silent or wrongly wired speakers and headphones.
Start with a low volume. Use headphones to check left and right.
How to use Speaker and Headphone Test (Left/Right)
Lower the volume, then play Left, Centre and Right, the sweeps and the two phase tests.
How it works
Sine tones are routed with a stereo panner; sweeps glide exponentially between frequencies; the phase test sends the same tone to both channels, in phase or inverted.
Example
The left tone is heard only in the left ear; on the inverted-phase test the sound becomes thin and diffuse, as it should.
Questions about Speaker and Headphone Test (Left/Right)
Is Speaker and Headphone Test (Left/Right) free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Tones are generated by the browser; very low and very high frequencies depend on your speakers. Everything is calculated in your browser; nothing you type is uploaded. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.