Xiaomi left earphone became quieter than the right: what to do and how to return stereobalance

You turned on your favorite track, but instead of the usual surround sound, you noticed that the left earphone Xiaomi clearly lacks volume? The problem is found in both the budget Redmi Buds and the flagship Xiaomi Buds 4 Pro — and the reasons can lie in both the settings of the smartphone and hardware malfunctions. In 80% of cases, the imbalance can be eliminated independently without going to the service center.

In this article, we will analyze all possible causes of uneven volume of Xiaomi headphones - from the banal failure of Bluetooth to wear of the speaker, as well as give step-by-step instructions for diagnosis and repair. ANC (active noise reduction, where imbalances are often associated with improper microphones.

Before you bring your headphones to the service, check 7 key points – perhaps the problem is solved in 2 minutes!

1. Checking the sound balance in the smartphone settings

The first thing to do is make sure the imbalance isn't caused by software settings. Android and iOS have a left-right-channel balance adjustment feature that can get lost after upgrading or connecting new devices.

On Xiaomi/Redmi/Poco, the way to set up is as follows:

1. Open the Settings. → Sound and vibration.
2. Slip on the headphone balance (or Mono sound in older versions of MIUI).
3. Move the slider exactly to the middle - this is a value of 0 (balance 50/50).

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If there is no headphone balance item, try connecting your headphones to another device (like a laptop) and check the balance there. On Windows, path: Settings → System → Sound → Device Properties → Additional Device Settings

On the iPhone:

1. Settings → Universal access → Audiovisual.
2. Find the L/R balance slider and set it in the center.

If the problem persists after resetting, move on to the next step. Note: in some MIUI firmware, the balance is lost after connecting the headphones to several devices at the same time (for example, to the phone and smart watch).

2. reset Bluetooth settings and re-pair

A common cause of imbalance is Bluetooth protocol failure, especially if the headphones are connected to multiple gadgets, in which case "clean" pairing helps:

Remove the headphones from the list of conjugate devices |Reboot the smartphone | Turn on the headphones pairing mode (press the power button for 5-7 seconds) | Connect again via the Bluetooth menu | Check the sound at maximum volume-->

For models with a charging case (for example, Xiaomi Buds 3T Pro) before reset, follow the additional step:

1. Put the headphones in the case.
2. Close the lid and wait 10 seconds.
3. Open the lid and hold the button on the case for 15 seconds until the indicator flashes red.

If the left earphone is still quieter after reconnecting, try connecting the headphones to another device (tablet, laptop), and if the imbalance persists, the problem is with the headphones themselves.

Redmi Buds 3/4 Lite|Xiaomi Buds 4/4 Pro|Xiaomi AirDots | Another model-->

3. Verification of physical damage and pollution

The volume imbalance can be caused by mechanical factors:

• 🔊 Clogging speaker -- dust, earwax, or moisture get into the grille and mute the sound, especially for models without protection. IP54+.
• 🧲 Membrane damage – when the membrane falls or presses strongly, the speaker deforms, which leads to a loss of volume.
• 🔋 Battery wear – in headphones with separate batteries (for example, Xiaomi Air) 2S) The left earphone can discharge faster, which affects the volume.

How to diagnose:

1. Examine the left earphone speaker grille for contamination, clean it with a soft toothbrush if necessary (do not use alcohol-containing liquids!).
2. Shake the earpiece next to the ear – if a crunch or rattle is heard, it’s a sign of membrane damage.
3. Check the charge level of each headphone in the Mi Home or Xiaomi Wear app (for supported models).A difference of more than 20% may indicate a battery failure.

⚠️ Warning: Do not try to disassemble adhesive headphones (such as the Xiaomi Buds 3 Pro) without special tools.The risk of damage to the microphone or Bluetooth antenna is 90%.

4. Diagnostics of hardware malfunctions

If the software methods didn't work, the problem is probably hardware.

For accurate diagnosis, connect your headphones to your PC and use Audio Tester, a free frequency-testing utility. If you see dips at 1-4 kHz, this indicates a speaker problem.

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If the left earphone became quieter after a fall or impact, with a probability of 95% damaged membrane or contacts, in this case, self-repair is possible only with spare parts and tools (price set of membranes for Xiaomi Buds – from 300 rubles).

5. Features of models with ANC (active noise cancellation)

In headphones with ANC (such as Xiaomi Buds 3T Pro or Redmi Buds 4 Active), volume imbalances are often associated with malfunctioning noise reduction systems. The ANC algorithm uses external and internal microphones to generate "anti-noise", and if one of the microphones is contaminated or damaged, this can affect the overall volume.

How to check:

1. Turn off the ANC in the headphone settings (via the Mi Home app or the combination of touches on the body).
2. Compare the volume to the ANC turned off. If the imbalance is gone, the microphones are the problem.
3. Clean the microphone holes (they are located on the outside of the headphone) with a dry soft brush.

If the cleaning didn’t help, try resetting the ANC settings:

1. Put the headphones in the case.
2. Hold the button on the case for 20 seconds until the indicator flashes red and blue.
3. Reconnect the headphones, it will reset the ANC calibration.

⚠️ Attention: In the headphones Xiaomi Buds 4 Pro when activated Transparency Mode (transparency) the left earphone may sound quieter - this is normal due to the difference in audio processing.

6. Update firmware and reset to factory settings

The manufacturer regularly releases firmware updates for Xiaomi headphones that fix audio bugs. For example, in Redmi Buds 4 Active, firmware version 4.7.1.0 fixed the imbalance problem when using ANC.

How to update firmware:

1. Install the Xiaomi Wear app (for Mi Band) or Mi Home.
2. Connect the headphones to the app.
3. Go to the Firmware Update section (if available).
4. Follow the instructions on the screen. Don't turn off your headphones during the update!

If the update doesn’t help, do a full reset:

1. Put the headphones in the case.
2. Press and hold the button on the case for 30 seconds until the indicator flashes red, white, blue.
3. Reconnect the headphones as a new device.

After resetting, all personal settings (including ANC calibration) will be deleted, but this often resolves imbalance issues.

7. When to contact the service center

If all of these methods have failed, you will most likely need professional repairs.

• 🔧 After a fall or mechanical impact (even if no external damage is visible).
• 🔋 Left earphone discharges into 2-3 faster than the right.
• 🎧 Imbalance is accompanied by wheezing, crackling or distortion of sound.
• 📡 The headphone periodically turns off or does not sync with the right.

The cost of repair in official Xiaomi services:

Before visiting the service, do the following:

1. Take a photo or write down the headphone serial number (usually indicated on the case or under the battery cover).
2. Make sure the headphones are not guaranteed (check the check or purchase date in the Mi Account).
3. Reset the settings to factory (instructions in the previous section).

⚠️ Warning: Unofficial service centers often use unoriginal parts, which can lead to repeated imbalances through the use of unofficial service centers. 1–2 Official services Xiaomi in Russia can be found on the website mi.com/ru/service/location.

FAQ: Frequent questions about the sound imbalance in Xiaomi headphones