Speaker Tester

Use the left/right channel test to play audio through each speaker independently. If you only hear sound from one side, the other speaker may be disconnected, damaged, or your audio balance setting may be off. Check your OS audio balance settings.

Use the tone generator and sweep through low frequencies (20-200 Hz). Good speakers and subwoofers should produce audible bass down to at least 50 Hz. If you can't hear anything below 100 Hz, your speakers may lack bass capability or your subwoofer might be disconnected.

Normal human hearing ranges from 20 Hz to 20,000 Hz (20 kHz). Most people lose high-frequency hearing with age — by 25, many can't hear above 17 kHz. Use the frequency sweep to find your personal hearing limit. Speakers should reproduce at least 80 Hz to 16 kHz clearly.

Yes! The speaker test works perfectly with headphones and earbuds. The left/right channel test is especially useful for verifying each earpiece. Use the frequency sweep to check for driver imbalances between left and right.

The tone generator creates pure sine wave tones at any frequency you choose using the Web Audio API. Adjust the frequency slider to generate tones from 20 Hz (deep bass) to 20 kHz (ultrasonic). You can also adjust volume. This is useful for testing speaker frequency response and identifying resonance issues.

Most laptop speakers and small desktop speakers can't reproduce frequencies below 80-100 Hz. You need dedicated speakers with larger drivers or a subwoofer for deep bass. Also, at very low volumes, bass frequencies become inaudible due to the Fletcher-Munson equal-loudness contours.

Browser-based audio is typically limited to stereo output (left/right channels). For true surround sound testing, you need desktop applications that support multi-channel audio output. Our stereo test verifies your front left and right channels, which are the foundation of any surround setup.

Yes. The test generates standard audio signals at safe levels. Start with low volume and increase gradually. Avoid playing very low frequencies (below 30 Hz) at maximum volume for extended periods, as this can stress speaker drivers. The default volume level is completely safe for all speakers and headphones.

Click the Left channel button — sound should come from your left speaker only. Click Right — sound from the right only. If the sides are swapped, your speaker cables are reversed. If both speakers play during a single-channel test, your system may be set to mono output. Check OS audio settings → channels → ensure Stereo is selected.

Desktop speakers: 60 Hz – 20 kHz. Bookshelf speakers: 45 Hz – 20 kHz. Studio monitors: 35 Hz – 22 kHz. Laptop speakers: 150 Hz – 15 kHz (limited). Subwoofer: 20 Hz – 200 Hz. Use the frequency sweep to find where your speakers start to roll off — that's their practical lower limit. Good headphones should reproduce 20 Hz – 20 kHz.

Likely causes: 1) Resonance — an object near the speaker is vibrating sympathetically at that frequency. Move objects away and retest. 2) Damaged driver — a torn cone or damaged surround causes distortion at specific frequencies. 3) Loose enclosure — screws or panels rattling. 4) Port noise — bass reflex ports can cause chuffing at very low frequencies near the port tuning frequency.

Yes, if your car supports Bluetooth audio or has an aux input. Connect your phone, open the tester, and run the channel test and frequency sweep. This is a great way to verify that all speakers in your car are working correctly and to identify blown drivers. Start at low volume.

Yes. It is free with no downloads and no display ads. Audio is generated locally using the Web Audio API, and no speaker readings are sent to any server. Affiliate recommendation events, when present, only measure anonymous recommendation views and clicks.