How to improve the sound in headphones Xiaomi Airdots 2

Many budget acoustics owners are faced with the fact that the box of devices sound flat or not loud enough. Xiaomi Airdots 2 (also known as Redmi Airdots) are a popular model, but their potential is often hidden behind standard software constraints. Basic Bluetooth protocol settings can cut frequencies, making audio files less detailed than they really are.

There are several proven ways to dramatically change the sound picture without buying additional equipment. Properly calibrating drivers and using third-party applications allow you to squeeze the most out of compact speakers. In this article, we will discuss the technical nuances that will help you adjust the perfect balance.

Before we go into complex manipulations, we need to rule out the trivial physical factors, and the quality of the playback depends on the density of the earbrush and the cleanliness of the speaker grids, and if the sound is deaf or quiet, it may not be the software, but the basic hygiene of the device.

Physical optimization and proper fitting

The first and most important step is to ensure tightness. Dynamic emitters installed in Xiaomi Airdots 2, work on the principle of creating pressure in a closed volume. If there are gaps between the silicone nozzle and the ear wall, the low frequencies (bass) simply evaporate, making the sound thin and squealing.

Try changing standard earpieces to larger, or denser, memory foams, which better fill the auditory canal and provide better insulation from external noise, and this automatically improves subjective sound quality, because extraneous noises don't interrupt the quiet details of the composition.

It is also worth checking the condition of the protective nets. Over time, earwax and dust clog the cells, which physically blocks the output of the sound wave, carefully clean the nets with a dry soft brush or use a sticky mass (blu-tack) to remove contaminants from hard-to-reach places.

• 🎧 Check if the standard nozzles fit tightly to your ear.
• 🧼 Regularly clean the speaker mesh from dust and pollution.
• 🔊 Consider buying foam chords for better insulation.

⚠️ Warning: Do not use sharp objects (needles, pins) to clean the speaker grids. You risk piercing the membrane or damaging the protective layer, leading to irreversible sound deterioration or breakage.

💡

For deep cleaning of nets, you can use a special cleaning clay (cleaning gel), which penetrates the pores and pulls out dirt without damaging the electronics.

Set up an equalizer in MIUI and Android

The Android operating system, and in particular Xiaomi’s MIUI shell, has built-in audio processing tools. The standard equalizer allows you to adjust the frequency range by amplifying or weakening certain hertzov, a basic but effective method of improving music perception.

To access the settings, go to Settings → Sound and Vibration → Sound Effects. Here you will find sliders for different frequency bands. For popular music (pop, hip-hop, electronics), a V-curve is often recommended: raising low and high frequencies with a slight dip in the middle.

However, you should not abuse the strengthening of bass. Excessive low-frequency rise can lead to clipping (distortion), since the small speaker Xiaomi Airdots 2 has a physical limit of the membrane.

In some versions of the firmware, Mi Sound Enhancer is available, which automatically analyzes the track being played and adjusts the frequencies in real time. Experiment with turning this option on and off, as it may add unwanted artifacts on some tracks.

High-quality codec activation

The quality of Bluetooth audio transmission depends on the codec used. By default, the system can choose the energy-saving SBC codec, which compresses the audio stream with losses. Xiaomi Airdots 2 supports a more advanced AAC codec that provides better stereo quality and less latency.

To check and change the codec, you need to activate the developer menu. Go to Settings → About phone and 7 times click on the build number (MIUI Version). After that, the developer section will appear in the settings menu. Find the Bluetooth Audio Codec and select AAC.

Switch to AAC Especially noticeable when listening to streaming services (Spotify, Apple Music, Yandex.Music), which use compression. FLAC-The difference in files may be less noticeable, but the stability of the connection often increases.

⚠️ Note: If you change the codec to AAC So, if you're missing the sound or you're having a lot of interference, you can put it back to "Default." Some older versions of Android may not work properly with the forced codec selection for specific headsets.

💡

The AAC codec is the optimal balance between sound quality and connection stability for Xiaomi and iOS ecosystem devices.

Use of third-party equalizer applications

If the built-in tools aren't enough, specialized applications from the Google Play Store come to the rescue, running on top of the system mixer and allowing for sophisticated signal processing algorithms, and one of the most popular and powerful tools is Wavelet.

Wavelet has an Autocorrection (AutoEq) database for thousands of headphone models. Although Xiaomi Airdots 2 may not be on the list, you can choose a Generic profile or find a profile of similar models (for example, other models). TWS-Xiaomi headphones, and you can use it. It aligns the frequency response, making the sound more smooth and natural.

Another powerful tool is Poweramp Equalizer, which allows you to create complex circuits of sound processing, including compressors and limiters, and it can significantly increase the volume without wheezing, by compressing the dynamic range.

• 📱 Download Wavelet or Poweramp Equalizer.
• 🎚️ Find your model profile or use Generic.
• 🔇 Activate the Limiter function to protect against overloads.

It is worth considering that the use of third-party equalizers increases the battery consumption of the smartphone, as the processor is forced to process the audio stream in real time. If autonomy is a priority, use the built-in MIUI tools.

Resetting and reconnecting headphones

Sometimes the problems with sound are caused by software glitches of the module Xiaomi Airdots 2. Headphones can wrongly coordinate volume levels with the smartphone or "remember" the settings of the equalizer, in this case helps a full reset (Hard Reset).

To perform the reset, place both earbuds in the charge case. Make sure the case is charged. Press and hold the touch zones on both earbuds simultaneously for 20-25 seconds (while they are in the case). Indicators should flash red several times, signaling a successful reset.

After the procedure, remove the device from the Bluetooth list on the phone (forget the device) and pair again, which will clear the connection cache and set new, correct communication parameters.

This procedure also helps if one earphone is quieter than the other, and often the problem is not the dynamics, but the desynchronization of the data channels between the left and right ears.

Configuration secrets through the engineering menu

For advanced users who want to access hidden audio engine settings, there is an option to use an engineering menu, which requires caution, as changing the wrong settings can lead to unstable system operation.

You can log into the engineering menu through a special code in the Phone application (number set). For MediaTek processors, this is often code ##3646633#, for Snapdragon, the paths may differ or require installation of the Engineering Mode application. → Audio.

You can adjust Gain levels for different scenarios: conversation, media, alarm clock. Raising the Media Playback can add volume, but be aware of the risk of overloading speakers. It is recommended to increase values by no more than 2-3 dB from stock.

The path for some devices:


EngineerMode -> Hardware Testing -> Audio -> Audio Debug Tool -> Speech Enhancement

These settings are only justified if you understand what each setting is for, and in most cases, standard equalizer methods are enough to make you listen to it comfortably.

⚠️ Warning: Changing the parameters in the engineering menu (especially gain levels) can cause irreversible damage to the speakers due to overheating of the coil.

Frequently Asked Questions (FAQ)