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Bass Test
The bass sweep slides a tone from 20 Hz up to 200 Hz. Listen for where the bass first appears, where it booms and where anything rattles; stop the sweep to see the exact frequency and hold that tone.
Start with your device volume low and turn it up slowly. Loud tones can damage hearing and small speakers.
Frequency sweep (bass, subwoofer and treble test)
A tone glides from low to high. Note where the sound starts and fades, and stop the sweep at any rattle, buzz or boom to see its exact frequency.
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Stopped at . Press “Hold this tone” to keep playing it in the tone generator.
Left / right speaker test
Each button plays from one side only. Use the voice to hear which side is which, or pink noise to compare loudness and tone.
Polarity (phase) check
Sit between the speakers or wear headphones. “In phase” should sound solid and centred; “out of phase” wide, hollow and thin. If it’s the other way round, one speaker’s + and − wires are swapped.
5.1 / 7.1 surround sound test
Each speaker says its own name; the subwoofer plays a 50 Hz tone. Your computer must output 5.1 or 7.1 (set it in your sound settings), and Chrome or Edge work best.
Only stereo is available. On Windows open Settings → System → Sound → your output → Speaker setup (or Control Panel → Sound → Configure) and choose 5.1 or 7.1, then reload. On a Mac use Audio MIDI Setup → Configure Speakers.
Tone generator
Presets
High-frequency hearing test
Tones play three beeps each, from 8 kHz up to 20 kHz. Use headphones in a quiet room at a comfortable, low volume. Your speakers limit the result too, and this is not a medical test.
Can you hear the beeps?
Play a frequency
Testing the rest of your setup? Try the Mic Test, the Webcam Test, the Dead Pixel Test or the Keyboard Test.
About the Speaker Test
The speaker test plays a voice from each speaker in turn, saying “left”, “right” or, on a surround system, “front left”, “center”, “surround right” and so on, so you can tell at once whether every speaker works and sits in the right place. A polarity check finds a speaker wired backwards, frequency sweeps show how low and high your speakers or headphones go and where they rattle, and the tone generator holds any frequency. Sound is made in your browser; nothing is recorded or uploaded.
How to use it
- 1 Turn your volume down to about a quarter.
- 2 Press Left, then Right: the voice should come only from that side.
- 3 For 5.1 or 7.1, press “Check for surround” and play each speaker.
- 4 Run the sweep to check bass and treble, and stop it at any rattle to see the frequency.
Frequently asked questions
How do I test the bass of my speakers?
Set a moderate volume, run the bass sweep and note the frequency where you first clearly hear the tone. That is roughly how low your speakers go. Loud peaks or nulls at certain frequencies are usually caused by the room.
Why can’t I hear the lowest frequencies?
Most laptop, phone and small speakers can’t reproduce below 80–150 Hz, and human hearing is less sensitive to deep bass. Silence at 20–40 Hz is normal unless you have a subwoofer or large speakers.
Can a bass test damage speakers?
Very loud low tones can push small drivers too far. Start quietly, stop if you hear distortion or clicking, and don’t play deep tones at full volume for a long time.
How do I test my speakers?
Press Left and Right to check each channel, Both to check the sound comes from the middle, and the phase buttons to check the wiring. Then run the full sweep: a working speaker plays a smooth tone that rises from a deep hum to a high whistle without crackling.
Why is there no sound at all?
Make sure the tab and the system aren’t muted, the right output device is selected (Windows: the speaker icon in the taskbar; Mac: Control Centre → Sound), and the volume is up. Browsers only start audio after a click, so press a button on the page rather than waiting.
What is a speaker polarity (phase) test?
It plays the same noise in both speakers, first in phase and then with one side inverted. In phase sounds solid and centred; out of phase sounds wide, hollow and thin in the bass. If it’s the other way round, one speaker’s + and − wires are swapped.
Does the speaker test work on phones?
Yes. Phone speakers are often mono or only slightly stereo, so use headphones for the left/right test. Turn off mono audio in the accessibility settings if one side stays silent.
Is anything recorded or uploaded?
No. All sounds are made by your browser, and the page never uses your microphone.
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