The situation when the right headphone Xiaomi Redmi Airdots sounds quieter than the left, is one of the most common complaints of budget users. TWS-It's not always a speaker breakdown or a serious hardware malfunction, and often the problem is software synchronization failures or a simple contamination of the acoustic grid that blocks the sound output.
Owners face this after months of use, when earwax, dust or moisture gets inside the structure, and asymmetry in sound can also occur due to the desynchronization of Bluetooth channels when devices stop communicating correctly with each other, and it is important to understand that in 80% of cases, you can return normal volume yourself without going to the service center.
In this article, we will look at all the possible causes of the volume imbalance in the right-hand earbuds Airdots and Redmi Buds series. You will learn how to conduct a deep cleaning, perform a full soldering (reset) of the headset and adjust the channel balance in the Android system. We will look at both software and physical factors that affect the quality of playback.
The main causes of volume imbalance
The first thing to rule out is the contamination of the sound-emitting grid. Xiaomi Redmi Airdots design assumes a small metal or plastic grille that clogs over time. Even a microscopic layer of plaque can reduce the volume by 30-50%, creating a feeling of malfunctioning the speaker.
The second common reason is the desynchronization between the left and right channels. TWS (True Wireless Stereo) requires perfect communication between the headphones. If the right earphone (which is often a master device in some versions of the firmware) loses communication with the left, it can go into mono mode or reduce the transmission power.
⚠️ Warning: Do not attempt to disassemble the headphone case with sharp objects if it is glued together. This is guaranteed to damage the speaker membrane and lose warranty.
The third factor is a software failure in the Bluetooth module of the smartphone or the headset itself. Cash files can conflict with the current version of the firmware, causing incorrect processing of the audio stream, in which case a complete reset to the factory helps.
Diagnostics: software or hardware problem
Before you start cleaning or repairing, you need to accurately determine the nature of the malfunction. Hardware problem involves physical damage to the speaker, the outgoing contact of the plume or the oxidation of the board. Software is errors in code, balance settings or drivers.
The easiest way to diagnose this is to connect the headphones to another sound source, which could be another smartphone, tablet or laptop, and if the right earphone is also quieter on the second device, the problem is the headset, and if the sound is smooth, look for the reason in the settings of the first phone.
It's also worth checking out the different apps, running music on Spotify, then switching to YouTube or a video call, and if the imbalance only shows up in one app, the problem is its equalizer settings or codec.
☑️ Primary diagnosis
Pay attention to the charge indicators. If the right earphone discharges faster than the left, it may indirectly indicate problems with the power controller, which also affects the volume.
Physical cleaning of the acoustic mesh
The most effective method of restoring volume is mechanical cleaning. Redmi Airdots have a deep grid seat where sulfur can easily penetrate, and you'll need isopropyl alcohol, cotton swabs, toothpick and scotch.
Carefully remove the silinum cloth. Examine the net in good light. If you see a dark coating, lightly moisten the cotton swab with alcohol (don't wet too much!) and wipe the surface. Don't push hard so you don't push the net inside the case.
| Tool. | Appointment | Risk of damage |
|---|---|---|
| Cotton swab | Surface plaque removal | Low. |
| Toothpick | Hard plugging | Medium (you can puncture the net) |
| Scotch (sticky tape) | Pulling dust from holes | Absent. |
| Isopropyl alcohol | Dissolution of fatty deposits | Medium (when injected) |
If a simple wipe didn't work, use the Scotch method. Put a small piece of Scotch on the net with a sticky side, press it and pull it abruptly. Repeat it a few times. It pulls the dirt out of the diffuser.
Plasticine method
Full reset (Hard Reset) of the headset
If the cleaning doesn't work, you have to do Hard Reset, which is a procedure that brings the headphones back to the factory settings and repairs the left and right channels together, and that solves the problem of desynchronization.
The procedure for the Xiaomi Redmi Airdots (relevant to Basic versions 2, 3):
- 📱 Remove the device from the Bluetooth list on your smartphone ("Forget the device").
- 🔌 Place both headphones in the charging case.
- ⏱️ Without removing them, pinch the touch zones on both headphones simultaneously on the headphones. 20-30 seconds.
- 💡 Indicators should flash red. 2-3 Once, then go out or light up white.
- 🔄 Perform the pairing again.
It is important to keep the headphones in the case during the reset, so that they do not turn off during the process. If the first time failed, repeat the procedure, increasing the retention time of the touch zones.
💡
When performing a reset, make sure the case is at least 50% charged, and interrupting the process by discharging can cause the controller to "brickle."
After reset, the headphones can behave strangely for the first 10 seconds: flashing different colors. It's normal, it's a process of searching for each other. Wait until one of them (usually on the right) flashes slowly, signaling readiness to connect.
Setting up sound balance in Android
There is a hidden or explicit channel balance setting in the Android operating system, and if the system calibrates, the sound can go all the way to one channel, often after an OS update or third-party audio codecs are installed.
To check and adjust:
- Go to the settings of your smartphone.
- Find the section "Accessibility" (Special Opportunities).
- In the list, select Hearing or Audiovisual settings.
- Find the slider L/R sound balance.
Make sure that the slider is in the center, and if it's shifted to the right, the left earpiece will be quieter, and vice versa, and sometimes it helps to artificially move the slider to its extreme position, listen to the track, and then return it back.
⚠️ Warning: Third-party equalizer apps (e.g. PowerAmp, Bass Booster) can intercept sound control and ignore system balance settings.
Microphone check and mono mode
There is a specific problem for Xiaomi Redmi Airdots that is related to the microphone, which often only activates one microphone (usually in the right earpiece) in talk mode. If the microphone is contaminated or closed with your finger, the person will hear you poorly, although you will hear music normally.
Check if the phone is in Mono-audio mode, and in this mode, the stereo is mixed into one channel, so if the balance is knocked down, one earphone may sound quieter or distorted.
Also worth mentioning is the V2.0 firmware issue in early versions of Redmi Airdots, where a soft right channel software bug was observed when using certain codecs (SBCs).
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If neither cleaning, reset, nor adjustment of balance helped, physical degradation of the dynamics is likely. In budget models, the membrane's life is often limited to 1-2 years of active operation.