Speaker & Headphone Test Online

Browser audio is limited to stereo output. The surround test simulates speaker positions using panning. For true multichannel testing, you need a hardware surround system — the tool will still help verify each position through stereo simulation.

If sound comes from both speakers when testing Left only, check your audio settings for a "mono" or "channel merge" option and disable it. Also verify your headphones/speakers are properly connected.

A phase test checks if your left and right speakers are wired with the same polarity. In-phase audio sounds full and centered. Out-of-phase audio sounds thin, hollow, and lacks bass — indicating one speaker has reversed wiring.

The tone generator lets you play any frequency from 20 Hz to 20,000 Hz using different waveforms (sine, square, sawtooth, triangle). Use it to test specific frequency ranges, find resonances, or calibrate your audio setup.

It plays a slow frequency sweep through the most revealing range. If your speaker has a torn cone or damaged driver, you will hear buzzing, rattling, or crackling at certain frequencies. Healthy speakers produce a smooth, consistent tone. If you hear buzzing, try the speaker cleaner.

Not at a sensible volume, but the sweep is the one place where volume genuinely matters, and it is worth knowing why. Below about 40 Hz a small driver cannot reproduce the note; it simply moves as far as it can, so all the power goes into excursion rather than sound. That is why a loud low sweep is hard on a laptop or a phone in a way that music at the same setting is not. Start at a modest level, listen for the buzz or rattle you came to find — a torn cone or a loose part gives itself away immediately — and turn it down rather than up if it appears.