Speaker & headphone test
Check left and right channels, reversed wiring, and sweep from bass to treble to find rattles. Includes a step-by-step auto test.
Turn your system volume down before playing anything, especially with headphones. High tones (above 10 kHz) and very low tones can be louder than they seem.
Step-by-step auto test
The page plays one sound at a time and asks what you hear: left channel, right channel, phase, bass rattle, and the lowest and highest tones you can still hear. You get a verdict at the end.
Left and right channels
Sound should come from the side you pick. Hearing it on the other side means the channels are swapped; hearing it on both means mono mode.
Phase (speaker wiring)
Plays the same sound on both speakers, first in phase, then out of phase. Meant for speaker pairs and headphones, not single speakers.
Normal: in phase sounds full and centered; out of phase sounds thin, loses bass and seems to come from both sides of your head. If it is the other way round, one speaker is wired backwards.
Frequency sweep
The tone rises from low to high. When you hear buzzing, rattling or a sudden jump in loudness, press Mark to note that frequency.
Tone generator
Noise
White noise stresses the highs, pink noise is even across bands (good for comparing left/right balance), brown noise leans towards bass. Press again to stop.
Multi-channel speakers
Results depend on both the speaker and the listener: people usually cannot hear below about 20 Hz, and hearing above 15 kHz fades with age. Laptop and phone speakers barely play anything below 100 Hz.
All sounds are generated in the browser. No files are downloaded and nothing is sent to the server.