Why Xiaomi is one headphone is quieter than another: 7 reasons and how to fix it

You've played a favorite track or you've started watching a movie, but you've noticed that one headphone on Xiaomi sounds quieter than another? It's more common than you think -- and it's not always the headphones themselves that are to blame. In 60 percent of cases, the volume imbalance is due to the settings of the smartphone, not the headset breakdown. But how do you know where the root of evil lies?

In this article, we will analyze all possible reasons - from banal clogging of the speaker to hidden bugs of MIUI firmware, which are found even on flagships like Xiaomi 14 Ultra or Redmi Note 13 Pro+. You will learn how to diagnose the problem in 5 minutes, which settings to check first, and when it is really worth carrying the phone to the service. And also - why sometimes it is not the smartphone, but the headphones themselves (even if they are new!).

1. Checking basic settings: what to do first

Before you disassemble your phone or carry it for repair, eliminate software causes that occur in 7 out of 10 cases.

• 🔊 The sound balance is in the settings. MIUI There's a hidden left/right channel balance regulator. → Sound. → Balance stereo sound and make sure that the slider is right in the center. If it is not, then your model does not support this feature (relevant for the budget Redmi A and the Redmi A). POCO M).
• 🎧 Monosound mode. Settings option enabled → Special opportunities → Monosound artificially equalizes the volume of the channels, but sometimes it fails.
• 🔄 Smartphone reboot: banal but it works: temporary disruptions to audio drivers can cause imbalances. MIUI.

If you have a problem, move on to the next step.

2. Hardware reasons: when the headphones or connectors are to blame

In 30% of cases, the volume imbalance is caused by physical damage to the headphones or 3.5mm connector (if any).

⚠️ Warning: Do not use metal objects to clean the connector! even a toothpick can damage the contacts).

• 🔍 Clogging earphone speaker. Take a flashlight and look at the speaker grid of a quiet earpiece. If you see dust or earwax, clean gently with a soft brush (for example, for makeup).
• 🧲 Cable damage. Check the wire on the curves (especially the plug and branching). Often, rubbed insulation leads to a break in one of the channels.
• 🔌 Contact oxidation in the connector. If you use wired headphones, connect them to another device. If there's an imbalance, it's a problem in the headset, if it's gone, it's in the Xiaomi connector.

For models without a 3.5mm connector (such as the Xiaomi 13T or Mix Fold 3), check the Bluetooth codecs. Sometimes crashes occur when using aptX or LDAC. Try switching to SBC (standard codec) in the Bluetooth headset settings.

3. Software failures: When MIUI or applications are to blame

MIUI firmware is known for its surprises, and sound imbalance is one of them, and most often, the problem is when you have:

• 📱 System updates (especially in beta versions) MIUI).
• 🎵 Third-party player installations (VLC, Poweramp) or modified firmware.
• 🔧 Resetting factory settings.

Here's what to do:

1. Reset the sound settings. Go to Settings → System → Reset the settings → Reset the sound settings.
2. Clear the cache of audio services. To do this: Settings → Applications → Application Management → Three dots (menu) → Show system → Media Storage → Clear the cache
3. Reverse the MIUI update. If the problem appears after the update, try going back to the previous version via Settings → About Phone → System Update → Three Points → Select the service pack.

Reset the sound settings | Clear the Media Storage cache | Check the balance settings in the player | Disable Dolby Atmos/Equalizer |Reboot the phone-->

Pay special attention to the equalizer settings. MIUI has a built-in equalizer (Settings → Sound → Equalizer) that can mishandle channels. Try turning it off or resetting it to factory settings.

4. Bluetooth headsets: why one headphone is quieter

If you use Bluetooth headphones (such as Xiaomi Buds 4 Pro or Redmi Buds 5), the reasons for the imbalance may be different:

• 🔋 Different levels of headphone charge. In some models, when one headphone is low, it automatically mutes. Check the battery level in the Mi Earphones app.
• 📶 Bad connection. If one earphone is farther away from the phone, the signal may be weakened. Try swapping them.
• 🔄 Reset the headset settings. Press the button on the headphone case on 10-15 seconds before the indicator flashes (usually red-white) then reconnect.

For ANC-enabled headsets, check if Transparency is only on one headphone, which can create an illusion of imbalance.

5.Audio Driver Problems: When to Get Into the Engineering Menu

If all previous steps have failed, the problem may lie in the audio drivers or hardware of the smartphone.

1. Check the phone's speakers. Turn on speakerphone and play music -- if the imbalance persists, the problem is with the smartphone itself.
2. Run the audio test in the engineering menu. ##4636## → Equipment Testing → Audio Check the signal levels for left and right channels.
3. Install a third-party test app, such as SoundAbout or Audio Test, which will show whether the signal is on both channels the same way.

If you see one channel missing from the engineering menu, it's a sign of hardware failure (e.g., a broken contact on the motherboard).

⚠️ Warning: Don't try to disassemble the phone yourself if you don't have experience with microelectronics! In Xiaomi models, the audio track is often soldered to the motherboard, and careless intervention can disable the entire communication module.

6.When to contact the service: signs of a serious breakdown

There are symptoms in which self-repair is impossible and you need to carry the phone to the service center:

• 🔊 One channel is missing completely (in the engineering menu shows 0 dB).
• 🔥 Extraneous sounds (wheezing, crackling) in a quiet earphone - a sign of damage to the amplifier or capacitors.
• 💥 The problem occurred after a fall/hit or moisture hit.
• 🔄 The imbalance persists on all headphones, speakers and after resetting settings.

The cost of repair depends on the model:

Before visiting the service, back up your data — sometimes a full phone reset is required for repairs — and make sure you check that the warranty period has expired (for most Xiaomi models, it is 12 months).

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If the phone is warranty, DO NOT open it yourself! in Xiaomi service centers, this is regarded as a violation of the warranty conditions, and repairs will become paid.

7 Prevention: How to Avoid Sound Problems in the Future

To prevent the volume imbalance from returning, follow these guidelines:

• 🔌 Clean the 3.5mm connector (if any) of dust and moisture regularly. Use silica gel bags to store your phone in wet weather.
• 🎧 Don't pull the headphones out of the cord, always hold on to the plug, and that will prevent the wires from breaking inside.
• 📲 Update. MIUI, Do not install beta if you want stable sound.
• 🔋 Watch the charge of the Bluetooth headset. Discharged headphones often start to "glutch" with stereo balance.

If you often listen to music via Bluetooth, turn off the option to turn off the absolute volume of Bluetooth in the developer settings (Settings → About Phone → MIUI Version → 7 times tap → For developers) in the developer settings.

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Before buying new headphones, check their compatibility with your Xiaomi model at the Mi Compatibility Center website.Some headsets (especially with aptX Adaptive) may conflict with older versions of MIUI.

FAQ: Frequent questions about Xiaomi's sound imbalance