Speaker Test
Test your speakers or headphones with calibrated sine tones, frequency sweeps, and left/right channel verification. All audio is generated in your browser.
Lower your volume first. High-frequency tones can be painful at loud levels.
Tone Generator
1000 Hz
20%
Left / Right Channel Test
Frequency Sweep
What This Tool Does
This speaker test generates audio directly in your browser using the Web Audio API — no downloads, no files to host, nothing sent to any server. It lets you send a precise tone, a continuous sweep, or a channel-isolated signal to your speakers or headphones so you can verify they are working correctly.
Use it before recording, after a repair, when buying new speakers, or to demonstrate how speakers reproduce different frequencies.
Common Uses
- Check whether a speaker can reproduce deep bass (20–60 Hz) or clear treble (8–20 kHz)
- Find buzzes, rattles, or distortion during a slow sweep
- Verify stereo wiring — play the left signal and confirm only the left speaker is active
- Identify blown drivers in multi-speaker systems
- Test the maximum clean output before distortion begins
Frequently Asked Questions
At moderate volume, yes. Keep the volume slider low when starting. Sustained loud pure tones (especially sine waves) can damage tweeters more easily than music because all the energy is concentrated at one frequency.
Most speakers and headphones cannot reproduce the extremes of human hearing. Subwoofers are needed for true 20 Hz bass. Very high frequencies (above 15–17 kHz) are often difficult to hear if you are over 30 years old — that is normal age-related hearing loss.
Sine waves are the cleanest and safest — use them for most tests. Square and sawtooth waves contain harmonics and are much louder for the same peak amplitude, so they can reveal distortion but also stress speakers more.
It sweeps from your Start frequency to your End frequency over the Duration you set. Set a low start and high end for an upward sweep, or reverse them for a downward sweep.