TestMyLaptop TestMyLaptop

Free Speaker & Audio Test — Check Left/Right Channels

Left/right channel check and a frequency sweep.

Test your speakers with pure tones — check for channel balance, distortion, and frequency response.

Volume
Idle
Channel: — Frequency: —
playing idle Keep volume moderate — especially during the sweep

How it works

How to use the speaker test

Start with the Both Channels test at a low volume to confirm both speakers are working. Then switch to Left Only — you should hear sound only from the left speaker. Repeat with Right Only. If audio bleeds into the wrong channel, you may have a loose connection, a software balance issue, or a failing audio jack. Run the Frequency Sweep last, as it cycles through the full human hearing range.

These tests use pure sine waves because they reveal distortion and uneven frequency response more clearly than music or speech. A clean sine wave should sound smooth and constant — any buzzing, crackling, or wobble points to a hardware issue.

Reading your results

No sound from one channel

If one side produces no sound at all when tested individually, that speaker, its amplifier channel, or the wiring to it has failed. On laptops this can sometimes be fixed by updating audio drivers; on external speakers the cable or the speaker itself is the likely culprit.

Distorted or buzzing sound

Distortion on clean sine wave tones is almost always a hardware problem. Check for:
— A torn or sagging speaker cone (visible on exposed drivers)
— Debris stuck in the speaker grille
— Loose screws or rattling chassis parts near the speaker
— Driver issues (update your audio drivers and test again)

Volume drops during the sweep

If certain frequencies sound much quieter or disappear entirely, the speaker has a limited frequency response. This is normal for small laptop speakers, which often struggle below 100 Hz and above 16 kHz. Larger speakers and headphones should maintain more consistent volume across the sweep.

Crackling only on bass notes

Crackling or rattling at low frequencies usually means a mechanical issue — the speaker cone may be separating from its surround, or the voice coil may be rubbing. This is a progressive fault that will worsen over time.

Browser compatibility

This tool relies on the Web Audio API (OscillatorNode, StereoPannerNode, and GainNode), which is supported in all modern browsers. The StereoPannerNode used for channel routing is available in Chrome 55+, Firefox 37+, Safari 14.1+, and Edge 12+.

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Frequently Asked Questions

How does the online speaker test work? expand_more
The tool uses the Web Audio API to generate pure sine wave tones inside your browser — no audio files needed. It sends the tone to the left channel, right channel, or both, and can sweep through the full audible frequency range from 20 Hz to 20 kHz.
What does a blown speaker sound like? expand_more
A blown or damaged speaker will produce buzzing, crackling, rattling, or a muddy/distorted sound instead of a clean tone. This is most noticeable on pure sine waves, especially at mid-range frequencies between 200 Hz and 2 kHz.
What is channel imbalance? expand_more
Channel imbalance is when one speaker is noticeably louder or quieter than the other. Use the left-only and right-only tests with the volume set to the same level. If one side sounds fainter, that speaker or its amplifier channel may be failing.
What should I listen for during the frequency sweep? expand_more
A healthy speaker should produce a smooth, even tone from the lowest rumble (20 Hz) up to the highest squeak (20 kHz). Listen for sudden drops in volume, buzzing, or total silence at any point — these indicate the speaker cannot reproduce certain frequencies, often a sign of age or damage.
Can this damage my speakers? expand_more
No. The generated tones are clean sine waves at normal listening volume. However, very low frequencies (below 40 Hz) can be physically demanding on small laptop speakers — keep the volume at a moderate level during the sweep. The volume slider defaults to a safe level.