Speaker Test
Test your left and right audio channels, check bass response, and sweep the full audible frequency range. Everything is synthesized in your browser using the Web Audio API.
Left
Right
How to use this test
- Set the volume slider to a comfortable level before starting any test.
- Click Left Speaker and confirm the tone comes only from the left.
- Click Right Speaker and confirm the tone comes only from the right.
- Run the Stereo Test to verify both channels play together.
- Use Bass Test to check whether your speakers reproduce low frequencies.
- Use Frequency Sweep to find dead spots across the audible range.
- Click any active test again or press Stop All Audio to stop playback.
Testing guide
How to test your speakers and audio channels
This speaker test generates pure tones directly in your browser using the Web Audio API, so there are no audio files to download and no external dependencies. It checks left and right channel separation, bass response, and full-range frequency coverage in a few seconds.
Best for
- Confirming that left and right speakers or headphone drivers are correctly wired and not swapped.
- Checking whether your speakers or headphones can reproduce low bass frequencies around 60 Hz.
- Sweeping the full 20 Hz to 20 kHz audible range to find dead spots, rattles, or roll-off in your audio chain.
How to run the test
- 1Set the volume slider to a comfortable level before starting any test.
- 2Click Left Speaker and confirm you hear the tone only from the left side.
- 3Click Right Speaker and confirm you hear the tone only from the right side.
- 4Run the Bass Test and listen for a clean, steady low-frequency hum without rattling or distortion.
- 5Run the Frequency Sweep and listen for any sudden drops, buzzing, or resonances as the tone moves from bass to treble.
How to read the result
If the left test plays from the right speaker, your channels are swapped in hardware or software.
If the bass test produces rattling or buzzing rather than a clean hum, something in the speaker enclosure or mounting is vibrating sympathetically.
If the frequency sweep goes silent in a range or produces a sharp resonance, that frequency band is being lost or distorted by the speaker, room acoustics, or audio driver.
Related tools and guides
Frequently asked questions
How does this speaker test work without audio files?
It uses the Web Audio API built into modern browsers to synthesize pure sine waves in real time. An OscillatorNode generates the tone, a GainNode controls volume, and a StereoPannerNode routes sound to the left or right channel. No files are downloaded or streamed.
Why can I not hear any sound?
Check that your browser is not muted, your system volume is turned up, and your output device is set correctly in your operating system audio settings. Some browsers also require a user interaction before they allow audio playback, which this tool handles by starting audio only when you click a test button.
Can this test damage my speakers?
At normal listening volume, no. The test generates clean sine waves that are gentler on speakers than most music. Avoid setting the volume to maximum, especially during the bass test, since sustained high-volume low-frequency output can stress small speakers that are not designed for it.
Why does the bass test sound weak on my laptop?
Laptop speakers are physically small and cannot reproduce very low frequencies effectively. Most laptop speakers roll off sharply below 150 to 200 Hz, so a 60 Hz tone will be barely audible or completely inaudible. This is a hardware limitation, not a fault. External speakers or headphones will reproduce the bass test properly.
What frequency range should I be able to hear?
Healthy young adults can typically hear from about 20 Hz to 20 kHz. High-frequency hearing naturally declines with age, so most adults over 30 cannot hear above 15 to 17 kHz. If the frequency sweep goes silent well before 15 kHz, it may be worth checking your hearing or your speaker specifications.
My left and right channels are swapped, how do I fix it?
First check that physical speaker cables or headphone plugs are not reversed. Then check your operating system audio balance settings and any audio driver software. On Windows, right-click the speaker icon in the taskbar, open Sound Settings, and check the channel balance. On macOS, check System Settings, Sound, Output.
Testing guide
How to test your speakers and audio channels
This speaker test generates pure tones directly in your browser using the Web Audio API, so there are no audio files to download and no external dependencies. It checks left and right channel separation, bass response, and full-range frequency coverage in a few seconds.
Best for
- Confirming that left and right speakers or headphone drivers are correctly wired and not swapped.
- Checking whether your speakers or headphones can reproduce low bass frequencies around 60 Hz.
- Sweeping the full 20 Hz to 20 kHz audible range to find dead spots, rattles, or roll-off in your audio chain.
How to run the test
- 1Set the volume slider to a comfortable level before starting any test.
- 2Click Left Speaker and confirm you hear the tone only from the left side.
- 3Click Right Speaker and confirm you hear the tone only from the right side.
- 4Run the Bass Test and listen for a clean, steady low-frequency hum without rattling or distortion.
- 5Run the Frequency Sweep and listen for any sudden drops, buzzing, or resonances as the tone moves from bass to treble.
How to read the result
If the left test plays from the right speaker, your channels are swapped in hardware or software.
If the bass test produces rattling or buzzing rather than a clean hum, something in the speaker enclosure or mounting is vibrating sympathetically.
If the frequency sweep goes silent in a range or produces a sharp resonance, that frequency band is being lost or distorted by the speaker, room acoustics, or audio driver.
Related tools and guides
Frequently asked questions
How does this speaker test work without audio files?
It uses the Web Audio API built into modern browsers to synthesize pure sine waves in real time. An OscillatorNode generates the tone, a GainNode controls volume, and a StereoPannerNode routes sound to the left or right channel. No files are downloaded or streamed.
Why can I not hear any sound?
Check that your browser is not muted, your system volume is turned up, and your output device is set correctly in your operating system audio settings. Some browsers also require a user interaction before they allow audio playback, which this tool handles by starting audio only when you click a test button.
Can this test damage my speakers?
At normal listening volume, no. The test generates clean sine waves that are gentler on speakers than most music. Avoid setting the volume to maximum, especially during the bass test, since sustained high-volume low-frequency output can stress small speakers that are not designed for it.
Why does the bass test sound weak on my laptop?
Laptop speakers are physically small and cannot reproduce very low frequencies effectively. Most laptop speakers roll off sharply below 150 to 200 Hz, so a 60 Hz tone will be barely audible or completely inaudible. This is a hardware limitation, not a fault. External speakers or headphones will reproduce the bass test properly.
What frequency range should I be able to hear?
Healthy young adults can typically hear from about 20 Hz to 20 kHz. High-frequency hearing naturally declines with age, so most adults over 30 cannot hear above 15 to 17 kHz. If the frequency sweep goes silent well before 15 kHz, it may be worth checking your hearing or your speaker specifications.
My left and right channels are swapped, how do I fix it?
First check that physical speaker cables or headphone plugs are not reversed. Then check your operating system audio balance settings and any audio driver software. On Windows, right-click the speaker icon in the taskbar, open Sound Settings, and check the channel balance. On macOS, check System Settings, Sound, Output.