The Headphone Test plays tones through each ear independently so you can confirm both channels on your headphones are working correctly. Put on your headphones, click Play Left and the tone should come only from your left ear — then click Play Right and it should shift entirely to your right ear. If both ears play at once or one side stays silent, the channel result display tells you whether you're dealing with swapped channels, a wiring fault, or a driver issue on your device. For speaker calibration or tinnitus matching, the tone generator gives you precise frequency control.
Bass Test
Check low frequency responseTreble Test
Check high frequency responseFull Range Sweep
20Hz to 20kHz sweepA proper headphone test covers several distinct properties that affect audio quality and usability. This tool tests all of them in one place: Use the bass test to find out how deep your speakers can reproduce low frequencies.
The most fundamental headphone test. Click Play Left — sound should come from your left ear only. Click Play Right — sound should come from your right ear only. If the channels are swapped, your headphone cable is connected in reverse, or your audio output device has its channels crossed. Use the stereo test to verify your computer's audio output channel mapping.
The bass test plays a low-frequency tone (around 60–80 Hz) to check whether your headphone drivers can reproduce deep bass. Over-ear headphones with large drivers typically perform well here; small earbuds and in-ear monitors may roll off bass below 60–80 Hz depending on their driver size and ear seal.
The treble test plays high-frequency tones (above 8,000 Hz) to check whether your headphones reproduce the high end of the audible spectrum. Thin or tinny treble suggests a weaker tweeter element, while complete silence at high frequencies may indicate driver damage. For a full frequency sweep, the Full Range test gradually steps from 20 Hz to 20,000 Hz.
Listen for crackling, buzzing, or rattling during playback. Clean tones should sound smooth without any mechanical or electronic interference. Persistent crackling often indicates a loose driver connection or a worn cable. Buzzing at specific frequencies may point to a resonance defect in the headphone housing.
If Play Left produces sound in your right ear, your channels are swapped. The most common causes are: a 3.5mm cable plugged in partially, left/right cups physically swapped on the headband (some over-ear headphones allow this), or an audio output setting in Windows or macOS that has swapped channels. Check your system audio balance settings first — on Windows: System → Sound → Output → Mono audio or Channel Balance; on Mac: System Settings → Sound → Output → Balance. The free speaker test online works with any speakers or audio output device connected to your browser.
A completely silent ear typically means a broken driver or a severed wire inside the cable — usually at the plug or where the cable enters the ear cup, where bending stress is highest. Unplug and replug the cable first. If the problem persists, try a different audio source to rule out a port fault. A side that is consistently quieter (but not silent) during the channel test usually points to a damaged driver or an unbalanced audio setting.
Intermittent crackling during playback is almost always a cable or connection problem — the signal path is breaking contact as the cable moves. Try holding the cable still during playback to confirm. Constant distortion at certain frequencies can indicate a blown driver (exceeding power limits) or a loose dust cover on the driver. Wired crackling that only appears at high volume usually means the amplifier is clipping.
Poor bass from in-ear monitors is most often caused by an improper ear seal — try different ear tip sizes until the seal is airtight. For over-ear headphones, weak bass can result from worn-out ear cushions that no longer form a complete seal around your ear. Replacing the cushions often restores the original bass response. If the bass test produces normal results but music sounds bass-light, the issue may be equalisation settings on your device rather than the headphones themselves.
Yes — this test works for all stereo audio output devices: over-ear headphones, on-ear headphones, in-ear monitors (IEMs), and standard earbuds. The channel test, bass test, and sweep are all hardware-independent. For single-driver earbuds, the bass test at 20–40 Hz may show no output simply because small drivers cannot reproduce those frequencies physically.
Start with the simplest cause: unplug the 3.5mm jack completely and reinsert firmly. If that doesn't fix it, check Windows: Right-click the speaker icon → Sound settings → Output → Mono/Balance; Mac: System Settings → Sound → Output → Balance slider. If the channels are still reversed in software, swap the headphone cups physically on the headband if the design allows it, or use an audio adapter that reverses channels.
The 20 Hz–20 kHz sweep should start as a very low rumble you may feel more than hear, rise through a deep bass thump, continue through clear midrange and vocal frequencies, and end in a high-pitched tone you may not be able to hear clearly above 16,000–18,000 Hz (depending on your age and the headphones). Any sudden drop-out, distortion, or rattle at a specific frequency during the sweep identifies a problem at that range.
Check your system balance setting first — this is the most common cause. On Windows, search for "Sound settings" and check the Output balance. On Mac, check System Settings → Sound → Output. If the balance is centred and one side is still quieter, the driver in that ear may be damaged, or the cable connection inside one cup has partially failed.
Yes. Bluetooth headphones add a digital audio codec layer (SBC, AAC, aptX, LDAC) that can affect perceived quality depending on connection strength and codec negotiation. If your headphone test shows inconsistent channel levels or dropouts on wireless headphones, try moving closer to the paired device or switching the codec in your Bluetooth settings. For precision audio testing, wired mode (if available) eliminates Bluetooth codec variability.
Stereo imaging is a headphone's ability to position sounds convincingly in the left-right and front-back space — a property that matters for gaming, music production, and critical listening. Good stereo imaging means an orchestra recording sounds like the instruments are spread across a wide soundstage. The channel separation test checks the most basic aspect of imaging: that left-channel content reaches only the left ear and vice versa.
If one side isn't working, check your cable connection. For wireless, check battery and pairing. See troubleshooting for more help.
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