Speaker and Headphone Test: Verify Left, Right, Bass, and Treble in Your Browser
Not sure if both speakers are working? This browser-based audio test checks left and right channels, bass response, and treble clarity without installing anything.
Introduction
You plug in your headphones, start a video call, and suddenly realize you can only hear from one side. Or maybe your new desktop speakers sound thin and you are not sure if the bass driver is actually working. Our Speaker Audio Test plays targeted test tones through specific channels so you can pinpoint exactly what is and is not working. It uses the Web Audio API, runs right in your browser, and nothing gets uploaded anywhere.
Step-by-Step Guide
Connect your audio device
Plug in headphones, connect to Bluetooth speakers, or use your built-in laptop speakers. Make sure your system volume is at a comfortable level before starting.
Run channel tests
Click "Left" to send audio only to the left channel, then "Right" for the other side. You should hear a clear tone on the selected side and silence on the other. If both sides play when you select just one, your audio setup may be running in mono mode.
Test frequency response
Use the bass test (low frequency around 60 to 100 Hz) and treble test (high frequency around 10,000 to 15,000 Hz) to check if your speakers reproduce the full range. Small laptop speakers will struggle with bass, which is expected.
Pro Tips & Best Practices
For the most accurate bass test, place your hand near the speaker or subwoofer. You should feel vibration even if you cannot hear the lowest frequencies clearly.
Test at moderate volume first. High-frequency test tones at full volume can be harsh and uncomfortable, especially through headphones.
If you are troubleshooting a video call issue, test with the same app (Zoom, Teams) open since some apps override system audio routing.
Common Mistakes to Avoid
Frequently Asked Questions
Why can I hear the left channel test in both ears?
This usually means your audio driver is set to mono output, or your headphone cable has a wiring issue. Check your system sound settings and ensure stereo output is selected.
I cannot hear the bass test at all. Is my speaker broken?
Not necessarily. Many laptop speakers and small Bluetooth speakers physically cannot reproduce frequencies below 100 Hz. Try the test with over-ear headphones or a speaker with a dedicated subwoofer.
Does this work with surround sound setups?
The tool tests stereo (left and right) channels. For 5.1 or 7.1 surround testing, you would need a dedicated surround test tool since browser audio is limited to stereo output.