Buzzing or rattling?
Replay the sustained bass and rattle finder. A physical vibration at repeatable frequencies can indicate a loose part or damaged driver.
All tests
Runs locallyNo accountNo install
ONLINE HARDWARE TEST
Speaker Test
Test left and right channels, bass, mids, treble, frequency sweeps and problem signals.
Start with your device volume lowPure tones can feel louder than music. Raise the volume only if needed.
SELECTED SIGNAL
Voice1,000 Hz · 0.7 second pulseADVANCED SIGNALS
Find problems a single tone can miss.
One side sounds weaker?
Use the same tone and level on left, then right. Check balance settings and cable connections before assuming hardware damage.
A frequency disappears?
Small speakers naturally miss deep bass, while high-frequency hearing varies. Sudden gaps in the sweep are more useful than absolute loudness.
YOUR LISTENING RESULT
Record what you heard.
Compare at a comfortable volume. Mark a problem only when it repeats with the same signal.
Left and right are equally clear
Bass has no repeatable buzz or rattle
Voices and midrange sound clear
Treble is present without crackle
Sweep has no sudden gap or distortion
LOCAL DIAGNOSTIC REPORT
Speaker Test result
Run the guided signals, then record the audible result for each row.
- Test signal level
- 25%
- Checks completed
- 0 / 5
- Left and right are equally clear
- Not assessed
- Bass has no repeatable buzz or rattle
- Not assessed
- Voices and midrange sound clear
- Not assessed
- Treble is present without crackle
- Not assessed
- Sweep has no sudden gap or distortion
- Not assessed
What this result supportsThe listener could hear the generated channels and frequency checks and recorded whether repeatable audible problems were present.
What it cannot proveAcoustic frequency response, safe sound-pressure level, amplifier power, or whether a problem originates in the speaker, enclosure, operating-system processing or hearing.
Signals are generated locally with the Web Audio API. KeyTest does not listen through your microphone or automatically judge the speaker—the final result comes from what you hear.
ABOUT THIS TEST
Fast answers without installing software.
Test left and right channels, bass, mids, treble, frequency sweeps and problem signals.
Browser limitation: Browser diagnostics provide practical signals but cannot replace physical inspection or professional repair.
Diagnostic input is processed locally for this test and is not uploaded by KeyTest.