Speaker Test
A full speaker check in one page: channels, a 20-second sweep, phase, and sub-bass — with deeper tools one click away.
Ready
Ready1. Channels
2. 20-second sweep (20 Hz → 20 kHz)
3. Phase (in / out)
4. Sub-bass 40 Hz
Turn your system volume down first
Start at a low volume, especially with headphones and low bass tones, then raise it slowly.
Need finer control? Use the dedicated frequency sweep, phase, and bass test pages.
This tool runs locally in your browser — no audio is uploaded.
How to use
- 1
Start with the channels
Play Left, Right, then Both. Confirm each side plays on its own and that Both is even. If a side is silent or swapped, fix wiring first — the other checks need both channels working.
- 2
Run the sweep and bass checks
Start the 20-second sweep and listen for rattles, buzzes, or sudden drop-outs. Then play the 40 Hz sub-bass tone: small speakers may go silent there, which is normal.
- 3
Check phase
Play the phase tone and switch between In phase and Out of phase. In phase should sound centered and solid; out of phase sounds thin and hollow with little bass. If out of phase sounds better, one speaker wire may be reversed.
How it works & limits
This page bundles the quick versions of the most common speaker checks: a channel balance tone, a 20 Hz–20 kHz logarithmic sweep, a 40 Hz sine for sub-bass reach, and an in/out-of-phase comparison where the right channel is polarity-inverted. All tones are synthesized locally by the Web Audio API.
Volume matters: browser output is not calibrated, so judge relative changes rather than absolute loudness. Keep the volume slider low for the sweep and bass tones — low frequencies demand much more driver excursion, and a hard-driven small speaker can buzz even when healthy. For focused checks, the dedicated sweep, bass, and phase pages offer more control.
FAQ
What order should I test my speakers in?
Channels first, then phase, then sweep, then bass. Channels confirm the wiring; phase problems are easiest to hear once both sides work; the sweep and bass check then probe the frequency range.
My speakers rattle during the sweep — are they broken?
Not necessarily. Isolate the frequency with the tone generator, then check whether the rattle comes from the speaker or from a desk, grille, or object resonating nearby. A rattle only at high volume on small speakers is often just driver limits.
Why is there no sound at 40 Hz?
Small speakers physically cannot reproduce 40 Hz — you hear silence or a faint doubling of higher frequencies, which is normal. Subwoofers and larger bookshelf speakers should produce audible output. The bass test page has a descent mode to find where your speakers roll off.
What is the difference between this and the left/right channel test?
The channel test focuses only on left/right wiring and balance with distinct pitches per side. This page is the full speaker workflow and adds sweep, phase, and sub-bass previews.
Does this work for a 5.1 or 7.1 surround system?
Browsers usually deliver stereo, so use the surround sound test page: it simulates the 5.1/7.1 layout through stereo panning and explains the limits. A true multichannel bitstream needs system-level support.
Related tools
Left Right Speaker Test
Check that left really is left and right really is right, on speakers or headphones.
Open toolFrequency Sweep Test
Sweep 20 Hz–20 kHz with adjustable duration, direction, and linear/log scaling.
Open toolBass Test
Sine tones from 10–200 Hz with a descent mode to find your lowest audible/reproducible frequency.
Open toolSpeaker Phase Test
Compare in-phase vs out-of-phase tones to catch reversed speaker wires.
Open toolSurround Sound Test
Click FL/C/FR/SL/SR/RL/RR/SUB nodes or run Auto Test for 5.1/7.1 layouts.
Open tool