Why Is One Earbud Quieter Than the Other?
One earbud goes quiet, or just noticeably quieter, and most people jump straight to the expensive answer: the speaker inside has died, the pair is half broken, time for new ones. But two much more common causes usually get skipped. One is a speaker mesh clogged with earwax and skin oil. The other is a balance setting nudged weeks ago by an accidental tap and never noticed. Both are free to fix, neither means opening anything up, and from inside your ear both sound exactly like a dying speaker. The only way to tell them apart is to check them in order instead of guessing.
Start with the mesh, not the warranty page
An earbud sits closer to your ear canal than any other audio device you own. The only thing between its speaker and your ear is a fine metal mesh, and your ear produces wax and oil all the time. That mesh slowly narrows over weeks, and most people never clean it, because a quiet earbud doesn't look like a cleaning problem. It isn't just one brand saying so. Sony's own help guide for its WF-1000XM5 earbuds says plainly that "if foreign material such as earwax becomes attached to the mesh part of the earbud tip, the sound may become muffled or difficult to hear", and Samsung's troubleshooting page for Galaxy earbuds says the same in its own words: "the build-up of dust, earwax, or other debris... can also make you sound muffled", and tells you to check that the mesh over each speaker is clean before assuming anything else is wrong. When two manufacturers point to the same thing, it's worth checking first.
Wax builds up at a different rate in each ear, so a blocked mesh often affects one side more than the other. That's exactly the symptom that makes people think the speaker is dying.
Your phone's earpiece, the speaker you hold to your ear on calls, sits behind the same kind of mesh and clogs the same way. If calls are what sound muffled, see how to test your phone's earpiece speaker.
Clean it the way the manufacturer says, not the way that seems obvious
A pin, a cotton bud pushed in too far, or a splash of rubbing alcohol can push wax deeper into the mesh instead of out, or damage the mesh itself. This is one place where following the manufacturer's instructions matters more than being quick. Apple's cleaning guidance for AirPods is clear on both points: "don't run your AirPods under water, and don't use sharp objects or abrasive materials" to clean them. For the mesh itself, Apple's instructions for AirPods Pro give an exact method: dip a soft children's toothbrush in micellar water, then "hold your AirPod with the mesh facing up. Brush the mesh in circles for about 15 seconds," do that three times, rinse the same way with distilled water, and let it dry completely for at least two hours before it goes back in the case. That recipe is Apple's method for that one product, though. It isn't a rule for every earbud, and you shouldn't assume the technique or the liquid is safe on a different pair. What carries over is the habit: look up what your own earbuds' maker recommends before you clean the mesh, instead of improvising something that worked for someone else's.
If cleaning doesn't fix it, check the balance setting
Every major platform has a left/right balance control, and every one of them is easy to nudge by accident and easy to forget. Once it's moved, it quietly favours one side until someone goes looking for it.
| Platform | Where to find it |
|---|---|
| iOS / iPadOS | Settings → Accessibility → Audio/Visual, where, according to Apple's support article, you can "adjust the audio volume balance between left and right channels" by dragging the Balance slider. |
| Android | Settings → Accessibility, under the audio options. Google's accessibility help puts the control there in general terms: "to change balance or combine audio channels when you play audio, use Audio adjustment features in your Accessibility settings". The exact menu name varies by phone maker and Android version, so look for "Audio adjustment" or "Balance" under Accessibility if yours is worded differently. |
| Windows | Settings → System → Sound → pick the output device → Volume. Microsoft's support article walks through checking it this way and says to "ensure both Left and Right channels are set to the same level (typically 100)". |
While you're in the accessibility settings, look for a separate "Mono Audio" switch too. It's there on purpose, for people who hear well in only one ear, and it mixes both sides into the same sound. It's a different setting from balance, it does the opposite of what you want if you're trying to hear a real difference between the sides, and it's just as easy to turn on by accident.
Not the mesh, not a setting: is it the speaker?
Once the mesh is clean and every balance control is centred, a real hardware fault is what's left. Still, confirm it before you assume it, the same way our dead, blown or miswired speaker guide pins down a fault in a room speaker before blaming the speaker itself. Two swaps will tell you. First, put the quiet earbud in your other ear if it fits, or at least notice whether the problem stays with the same earbud or the same ear. If it follows the earbud, the fault is inside it. If it follows your ear, look again at wax, fit or your hearing rather than the hardware. Second, pair the same earbuds with a different phone or computer. If the imbalance follows the earbuds, the fault is in the earbuds. If it disappears, the first device's balance setting or a stuck Bluetooth connection was the real cause, not the earbuds you were about to replace.
If the speaker really has failed, there's no safe fix at home. Wireless earbuds are sealed, and prying one open risks more damage and cancels any warranty you have left. The sign to listen for isn't silence but distortion or buzzing when it's playing loud, the same thing our speaker guide describes for a blown speaker, just in a speaker a few millimetres across. At that point it's a warranty or replacement question, not a repair.
One more thing is worth ruling out while you're testing, because it's easy to confuse with this. If both earbuds are playing, but the sound feels hollow with no solid centre, rather than just quieter on one side, that's a different fault. See out of phase or reversed polarity for what causes it and how it differs from one side being quieter. And if it's the microphone in one of your earbuds that has gone quiet on calls, not the sound, that's a completely different problem, down to permissions and app settings rather than the mesh or balance. It's covered in why isn't my microphone working.
Check it properly, don't go by memory
After cleaning the mesh and checking the settings, don't trust your memory of how lopsided it sounded before. Our speaker test sweeps a single tone smoothly from left to right, and lets you jump to far left, centre and far right. Put your earbuds back in and compare both sides directly with the same sound, instead of against a memory of how uneven it felt an hour ago.