How to Test Speakers

On the speaker test, play left and right separately, then centre. Each side should be equal and the centre focused. If one side is silent, see one speaker not working.

On the polarity test, compare in-phase and out-of-phase bass; out of phase should sound thinner.

Play octave tones and a frequency sweep at fixed volume; note peaks, dips and limits. Use pink noise to judge overall tone balance.

Hold low tones and listen for buzzing; play the distortion test at rising levels. Crackling at any level: see speakers crackling.

Finish with familiar, well-recorded music at moderate volume. Tests show problems; music shows whether you enjoy the sound.

Headphones need a few extra checks (seal, polarity, headset mic). Follow the separate how to test headphones checklist.

Weak bass, a vague centre image and sound that seems to come from everywhere. Swap + and − on one speaker to fix.

• Speaker Test
• Headphone Test
• Frequency Sweep

The five-minute test

Channels, phase, sweep, bass and a favourite track.

Sudden dropouts and huge peaks

Usually room effects; move the speaker or listening position.

Know your limits

Small speakers will not play deep bass, whatever the test.

One speaker not working

See our one-speaker fix guide.

No bass from the subwoofer

Check power, crossover, cable and the LFE setting in your receiver.

Stereo left/right channel test

Play each side alone.

Frequency sweep: find dead spots

Note where sound drops out.

Gear that helps

A cheap measurement mic and a sound level meter make results objective.