What to do if one Xiaomi wireless headphone is quieter than another

When one Xiaomi, Redmi or QCY headphone sounds significantly quieter than the other, it is one of the most common complaints of users of fully wireless headsets. Volume imbalance not only spoils the enjoyment of listening to music, but also disrupts the stereo effect, shifting the sound scene in one direction. Often users mistakenly believe that the problem lies in the hardware defect of the speaker, and rush to carry the device to the service center or to issue a return.

In fact, in the vast majority of cases, the cause is software failures of channel synchronization, contamination of the sound-emitting grid or incorrect settings of the smartphone operating system. Asymmetry of sound can occur after updating the firmware, connecting to a new device, or simply because of the ingress of earwax into micro-holes. Before you get upset, you need to conduct a comprehensive diagnosis, eliminating simple software and physical factors.

In this guide, we will discuss in detail the algorithm of actions that will help restore a uniform sound. We will look at deep cleaning methods, hidden Android settings, how to force the connection between the modules of the headset and the specific features of the Xiaomi Earbuds application. Careful follow the instructions will return the device to the factory sound characteristics without the need for complex repairs.

⚠️ Warning: Before any manipulations, make sure that both the headphone and the charge case have a battery charge of at least 40%. Interrupting the process of resetting or flashing on a low charge can lead to complete inoperability of the device.

Physical Diagnostics and Cleaning of Acoustic Grids

The most common but often ignored cause of quiet sound is the banal pollution. Intra-channel headphones are designed to fit tightly into the ear canal, creating ideal conditions for the accumulation of sulfur, dust and pile. Even a microscopic film on a dynamic emitter grid can reduce volume by 30-50%, creating the illusion of breakage.

Carefully inspect the main and auxiliary headphones in good light, preferably using a magnifying glass or a smartphone macro. If you notice a yellowish plaque or dark dots on the grid, you need careful cleaning. Do not use sharp objects like needles or pins, as there is a high risk of piercing the speaker membrane or pushing dirt deeper into the case.

For safe cleaning, use a soft toothbrush with hard bristles or a cotton swab slightly soaked in isopropyl alcohol. Circular movements gently walk along the surface of the mesh, removing contaminants. After the procedure, allow the device to dry completely for 5-10 minutes before installing in the case.

• 🧼 Use a soft dry brush to remove surface dust before wet treatment.
• 💧 Isopropyl alcohol evaporates quickly and leaves no conductive traces, unlike water.
• 🔍 Check not only the main mesh, but also the small holes of microphones on the case.
• 🚫 It is strictly forbidden to blow into headphones with your mouth - wet breathing will only compact the sulfur inside.

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For deep cleaning of the nets, you can use a special gel-vet (cleaning slime), which pulls dirt from the micro-pores without damaging the speaker membrane.

Checking the balance settings and special features of Android

If the physical cleansing failed, the problem may be hidden in the operating system’s channel balance. Android has a built-in left-right volume control that may have been lost by accident or after a system update.

To check, go to your smartphone's settings menu. The path may vary depending on the MIUI shell or HyperOS, but it's usually in the special features section. Find the audio output item and make sure the balance slider is strictly centered. The shift of even one division to the side can be noticeable on quiet tracks.

Also, it's worth checking the sound effects on. Built-in equalizers, Dolby Atmos or "sound enhancement" functions sometimes don't work properly with certain Bluetooth codecs, cutting the frequencies in one of the channels. Try to turn off all the sound enhancements and check the headphones in "normal" or "standard" mode.

1. Open the settings of your Xiaomi smartphone.
2. Go to the section Additional settings → Special. capabilities.
3. Select the "Hearings" or "Audiovisual" tab.
4. Find the left and right channel balance and set the value in the center.

In some cases, the imbalance is caused by a mono-audio function that sums the stereo signal into a single channel. If this function is activated, the sound may go unevenly. Make sure the Mono-audio switch is off.

Resetting settings and reconnecting the headset

Complex logic errors in the Bluetooth connection protocol often result in dissynchronization of volume between modules. In fully wireless models, one earpiece acts as a master transmitting a signal to the second (Slave). If this process is disrupted, the "knowledgeable" earpiece can work quieter or with a delay.

The most effective way to fix this is to completely reset the headphones to factory settings, which clears the device's internal memory of temporary files and pairing errors, and it's important to reset correctly by following a sequence of taps that may differ from model to model, such as AirDots, Redmi Buds or FlipBuds.

After reset, remove the device from the Bluetooth list on the phone (“Forget the device”) and pair it again, as with a new gadget, ensuring that the smartphone establishes a fresh connection profile with the correct volume parameters.

⚠️ Warning: After reset, the headphones may stop automatically connecting to each other, in which case you first need to connect them together (usually by quickly double touching the sensors on both headphones at the same time), and then search for them in the Bluetooth menu of the phone.

Using Xiaomi Earbuds app and calibration

For owners of headphones ecosystem Xiaomi and Redmi critical use of the official application Xiaomi Earbuds (or Mi Wear), this software package allows not only to update the firmware, but also to perform calibration of speakers, which is impossible to do through the standard menu Android.

The app often features a device status check feature that can detect anomalies in one channel, and manufacturers regularly release updates (firmware) that fix known volume control bugs, and an outdated version of the software is a common cause of conflicts with new versions of Android.

Some premium models, such as the FlipBuds Pro, offer adaptive noise reduction and transparent modes, and if these modes are not working properly (e.g., the outside noise microphone is clogged), they may have a quiet sound effect due to noise reduction algorithms. Try switching the ANC On/Off/Transparency modes and see if the volume balance changes.

Hardware malfunctions and battery wear

If software and cleaning didn't work, there's probably a hardware malfunction. One of the hidden causes of the quiet sound is the battery degradation in one of the headphones. If the battery in the "quiet" earphone keeps the charge worse, the voltage on the speaker can drop faster, (leading) to lower maximum volume.

It's also worth considering the possibility of damaging the speaker membrane, and even if the earphone is visually intact, the internal shock or a sudden surge of voltage could damage the coil, in which case the sound becomes not only quiet, but hoarse, especially at low frequencies.

Check the charging contacts in the case and on the headphones themselves. Oxidation of the contacts can cause one earphone to not fully charge (for example, up to 80% instead of 100%), while the second is fully charged, which creates an artificial imbalance in the running time and volume potential.

• 🔋 Check the charge level of each headphone separately in the Bluetooth widget.
• ⚡ Wipe the contacts with alcohol if you notice darkening or oxidation.
• 🔊 Listen to the sound at maximum volume: wheezing indicates a break in the speaker.
• 🌡️ Overheating of one of the headphones during charging is a sign of a short circuit.

⚠️ Note: If one earphone discharges significantly faster than another (e.g., 2 hours vs. 5 hours), the problem is almost certainly battery wear, not software failure.

When service repairs are needed

There are a number of symptoms in which self-repair is impossible or impractical.If after a complete cleaning, reset, flashing and checking on another smartphone, the problem persists, it is a physical defect of the components.

Intrachannel speakers are very thin and fragile, and trying to disassemble the glued headphone case at home is 95% of the time the final breakage, and the glue used by manufacturers requires an industrial hair dryer and special tools for tidy opening.

If the device is warranty-worthy, the best solution is to contact an authorized Xiaomi service center, if there is a check and there are no traces of opening or moisture (LCI indicators), the device will be replaced or repaired for free.

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The complex problem of quiet sound is solved 80 percent of the time by cleaning the nets and completely resetting the headphones, and the remaining 20 percent of the time requires replacement of speakers or batteries.