Why Is One Earbud Quieter Than the Other?
One earbud goes quiet, or just noticeably quieter, and the first instinct most people reach for is the most expensive one: the driver has failed, the pair is half-dead, time to buy a replacement. That instinct skips over the two causes that are actually responsible far more often — a speaker mesh clogged with earwax and skin oil, and a balance setting nudged by an accidental tap or drag weeks ago and never noticed since. Both cost nothing to fix, neither requires opening anything, and both sound, from inside your ear, exactly like a dying driver. The only way to tell them apart is to work through them in order rather than guess.
Start with the mesh, not the warranty page
An in-ear or true-wireless earbud sits closer to your own ear canal than any other audio device you own, behind a metal mesh screen that is the only thing between the driver and a canal that produces earwax and skin oil continuously. That mesh silently narrows over weeks, and most people never clean it because nothing about a quiet earbud looks like a cleaning problem. This is not one manufacturer's marketing claim: Sony's own help guide for its WF-1000XM5 earbuds states 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 own troubleshooting page for Galaxy earbuds says the same thing in different 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. Two different manufacturers naming the same failure independently is a stronger claim than either one alone, and it is why the mesh is worth checking before you check anything else.
Because wax builds up at a different rate in each ear, a blocked mesh very often affects one side more than the other — which is exactly the symptom that makes people suspect a dying driver in the first place.
Clean it the way the manufacturer says to, not the way that seems obvious
A pin, a cotton swab pushed in too far, or a splash of rubbing alcohol can each push wax deeper into the mesh instead of out of it, or damage the mesh itself — so this is one of the few places where following the manufacturer's own instructions matters more than moving fast. Apple's general cleaning guidance for AirPods is explicit on both fronts: "don't run your AirPods under water, and don't use sharp objects or abrasive materials" to clean them. For the mesh specifically, Apple's own instructions for AirPods Pro go further and name an exact method: dip a soft-bristled children's toothbrush in micellar water, then "hold your AirPod with the mesh facing up. Brush the mesh in circles for about 15 seconds," repeated three times, rinsed the same way with distilled water, then left to dry completely for at least two hours before it goes back in the case. That exact recipe is Apple's own method for that specific product; it is not a universal instruction for every earbud on the market, and neither the technique nor the liquid should be assumed safe on a different one. What generalises is the discipline, not the method: check your own earbuds' manufacturer support page for what it actually recommends before you clean the mesh at all, rather than improvising a method that happened to work for a different product.
If cleaning doesn't fix it, check the balance setting
Every major platform ships a left/right balance control, and every one of them is easy to nudge by accident and easy to forget exists once it has moved. It quietly favours one side forever until someone goes looking for it.
| Platform | Where to find it |
|---|---|
| iOS / iPadOS | Settings → Accessibility → Audio/Visual, where, per Apple's own 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 own accessibility documentation places 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 submenu label varies by phone maker and Android version, so look for "Audio adjustment" or "Balance" under Accessibility if the wording differs. |
| Windows | Settings → System → Sound → select the output device → Volume. Microsoft's own support article walks through checking it exactly this way and says to "ensure both Left and Right channels are set to the same level (typically 100)". |
While you are in the accessibility settings on any of the three, look for a separate "Mono Audio" toggle as well. It exists deliberately, for someone with usable hearing in only one ear, and it folds both channels down to identical content — which is a different setting from balance, does the opposite of what you want if you are trying to hear a real stereo difference, and is just as easy to have switched on by accident.
If it's neither the mesh nor a setting: isolating the driver
Once the mesh is clean and every balance control reads centred, a genuine hardware fault is what's left — but confirm it before assuming it, the same way this site's dead, blown or miswired speaker guide isolates a room speaker fault before blaming the driver. Two swaps do the isolating. First, put the quiet earbud in your other ear, if your ears fit both, or otherwise pay attention to whether the problem stays with the same physical earbud or the same ear — a fault that follows the earbud is inside it; a fault that follows the ear points back at wax, fit, or hearing rather than hardware. Second, pair the same earbuds with a different phone or computer. If the imbalance follows the earbuds to a different source, the fault is in the earbuds. If it disappears, the earlier source's balance setting or a stuck Bluetooth pairing was the real cause all along, not the hardware you were about to replace.
If the driver really has failed, there is no safe DIY fix: true-wireless earbuds are sealed units, and prying one open to inspect or repair the driver risks damaging it further and voids whatever warranty is left. The sound to isolate for is not silence but distortion or buzzing under load — the same signature this site's speaker guide describes for a blown cone driver, just scaled down to a driver a few millimetres across. That is a warranty or replacement question, not a repair one.
One more symptom is worth ruling out while you're testing, because it is often mistaken for the same problem: if both earbuds are playing, sound is present on both sides, but the stereo image sounds hollow with no solid centre rather than simply quiet on one side, that's a different fault entirely — see out of phase or reversed polarity for what causes it and how it differs from a level imbalance. And if it's the microphone built into one of these earbuds that has gone quiet for calls rather than the driver, that's a completely different fault chain — permission and app settings rather than a mesh or a balance control — covered in why isn't my microphone working.
Confirm it, don't just assume it
After cleaning the mesh and checking every balance setting, don't trust your memory of how lopsided it sounded before. This site's Balance & Separation tool sweeps a single tone smoothly across the stereo field and offers fixed hard-left, centre and hard-right points, so you can put the earbuds back in and compare both sides directly against each other with the same signal, rather than against a memory of how uneven it felt an hour ago.