Speaker Test
Start quiet. Keep volume low; loud tones or noise can harm hearing or speakers. Not a medical device.
Check that Left plays only on the left speaker and Right only on the right.
In-phase sounds centred and full; out-of-phase sounds hollow. If "in phase" sounds hollow, a speaker cable may be reversed.
Left/right, phase and bass test
This speaker test checks that your stereo channels are connected the right way round, that your speakers are in phase, and how low your subwoofer or headphones can play. Tap a button to start a test; tap it again or press Stop to end it.
How to test your speakers
Left and right channel test
Pink noise plays only in the chosen channel. If Left comes out of the right speaker, swap the cables.
Phase test
“Both” plays the same signal in phase and should sound focused in the middle. “Out of phase” inverts one side and should sound hollow and spread out. If it is the other way round, one speaker cable has + and − swapped.
Subwoofer and bass test
Play 20–100 Hz tones at low volume and note the lowest one you can hear or feel cleanly. Stop immediately if anything rattles or the cone moves violently.
More free audio tools
Hearing and speaker safety
Start with the volume low and raise it slowly. Tones are more tiring than music because all the energy sits at one frequency. Very low tones (below about 40 Hz) can push small speakers and laptop drivers past their limits, and very high tones (above about 15 kHz) can be loud even when you can barely hear them. Take breaks, never test at a level that is uncomfortable, and stop if you notice ringing, pain or rattling.
This site is a sound tool for testing, tuning and experimenting. It is not a medical device and does not diagnose, treat or prevent any condition. If you are worried about your hearing or tinnitus, talk to an audiologist or doctor.
Speaker Test FAQ
Does this work with headphones and earbuds?
Yes, the left/right test is a quick way to check earbuds are in the correct ears.
Why can't I hear the 20 Hz tone?
Most small speakers, laptops and phones cannot play that low. A subwoofer or good headphones are needed.
Can the bass test damage speakers?
Loud low tones can. Keep the volume low and stop if you hear distortion.