How to increase the volume of the speaker on Xiaomi Mi 9T: from standard settings to hidden features

The Xiaomi Mi 9T (also known as the Redmi K20 in some regions) is one of the brand’s most popular smartphones, but many users say the factory loudness of the speakers leaves much to be desired, especially when listening to music in noisy rooms, watching videos without headphones or while making hands-free calls. Fortunately, there are several ways to improve the sound, from basic settings to advanced methods that require root rights.

In this article, we’ll look at 7 proven ways to turn up the volume on the Mi 9T, including changes to system parameters, using third-party apps, and even modifying configuration files. It’s important to understand that some methods can affect sound quality or speaker life — so we’ll detail all the risks and nuances. If you’re willing to experiment, start with the safest options and gradually move on to more complex ones.

1. Optimization of standard sound settings

Before you resort to radical measures, check the basic settings of the Xiaomi Mi 9T. Often the problem lies not in hardware limitations, but in the wrong settings of the system or applications.

Open the Settings menu → Sound and vibration and pay attention to the following points:

• 🔊 Media volume: push the slider to maximum, sometimes after system updates, it resets.
• 🎵 equalizer MIUI: activate it and select the preset "Basy" or "Rock" - this will add saturation to the sound.
• 📱 Adaptive sound: Turn off this feature if it is active – it automatically lowers the volume depending on the surrounding noise.
• 🔕 Do not disturb: make sure that the mode is not manually activated or on schedule.

It's also worth checking the settings of individual apps, for example, YouTube or Spotify may have its own volume limit, go to the player settings and set the maximum value. If you use a Bluetooth speaker or headphones, try turning them off and check the sound through the built-in speaker, sometimes the problem lies in the connection profile.

2.Use of third-party applications to amplify sound

If standard settings don't work, you can use specialized utilities that are software-enhanced, increasing the amplitude of the audio signal, and importantly, these applications can distort sound and shorten the life of speakers when used for long periods at maximum volume.

Top.-3 Proven applications for Xiaomi Mi 9T:

• 🎛️ Volume Booster GOODEV: A simple booster with pre-set profiles for music, video and calls. supports equalizer and bass boost.
• 🔊 Precise Volume: allows you to adjust the volume more accurately (up to 100 steps instead of the standard 15.
• 🎧 Wavelet: Advanced equalizer with support LDAC It can improve sound even at standard volume.

Before installing, check the reviews for compatibility with MIUI 12/13/14 - some applications may conflict with the shell. After installation, test the sound gradually, increasing the volume by 10-15% at a time to avoid distortion. Please note that when using such utilities, the warranty on the device can be canceled if the service center detects software modifications.

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If the sound starts to wheez after installing the booster, try reducing the gain level by 20-30% or turning off the Bass Boost function - it often causes distortions on weak speakers.

3. activation of the engineering menu (without root)

Xiaomi Mi 9T hides the advanced audio settings in the engineering menu, which can be opened without obtaining root-rights. This method allows you to increase the volume by 20-30% due to changing hardware constraints, but requires caution – incorrect settings can damage the speaker.

Instructions for entering the engineering menu:

1. Open the Phone app and enter the combination: ##36446337###
2. Select the Hardware Testing option → Audio.
3. In LoudSpeaker Mode, find the following options: Max Vol (maximum volume), Min Vol (minimum volume) Normal Vol (standard volume)

Max Vol

Normal Vol

Save the changes and restart the device.

After you apply the settings, test the sound on different types of content: music, video, calls. If you have wheezing or crackling, return the values to the standard ones. Also note that after the MIUI update, the engineering menu settings may reset.

Record the current parameters | Check the battery charge (minimum 50%) | Connect the charger | Make a backup of the data-->

Modification of system files (root required)

For users with unlocked bootloader and root rights, deeper settings are available. mixer_paths.xml, The one that controls volume limits at the hardware level. 9T This file is located along the way. /vendor/etc/mixer_paths_qrd_skuh.xml — Modification of the system can lead to irreversible consequences if you make a mistake in syntax.

Step-by-step:

1. Install a file manager with root support (such as Root Explorer or Solid Explorer).
2. Cross the path. /vendor/etc/ and find the file. mixer_paths_qrd_skuh.xml.
3. Make a backup copy of it (copy it on the backup) SD-map).
4. Open the file in the text editor and find the lines with the parameters: <path name="speaker"> <ctl name="RX1 Digital Volume" value="84" /> <ctl name="RX2 Digital Volume" value="84" />
5. Increase the value to 90-95 (no more than 100!).
6. Save the changes, set the rights 644 (rw-r--r---) and restart the device.

5. Update of firmware and core

Sometimes the problem of low volume is associated with software bugs in a particular version of MIUI. The manufacturer regularly releases updates that correct sound errors.

1. Go to Settings → About the phone → System update.
2. Click Check Updates and install the latest version if available.
3. After the update, reset the sound settings to the factory (Settings → Sound → Reset).

If official updates don’t work, consider installing custom firmware (like LineageOS or Pixel Experience), which are often optimized better than standard MIUI and offer advanced audio settings.

• 🔓 Unlocked bootloader (bootloader).
• 📱 Established custom recovery (TWRP).
• 🔄 Backup all data (firmware erases internal memory).

Before installing custom firmware, check the stability reviews on Mi 9T (codenamed davinci). Some builds may have sound bugs, so choose versions marked "stable."

6. Hardware solutions: cleaning speaker and replacement of the grid

If the software methods fail, the problem may lie in the physical state of the speaker, which accumulates dust over time, which worsens the sound. Xiaomi Mi 9T is characterized by two hardware malfunctions:

• 🧹 Clogging speaker: dust and pile get through the grille, reducing the amplitude of sound.
• 🔧 Weakening of contacts: after falls or impacts, the speaker may not fit tightly to the body.

Cleaning can be done on your own:

1. Take a soft brush (for example, for makeup) and gently walk along the speaker grille.
2. Use compressed air (a balloon) to blow dust out of the crevices. Keep the balloon vertically to avoid fluid intrusion.
3. For deep cleaning, disassemble the device (experience is required!), disconnect the speaker and blow it with air.

If cleaning didn't help, maybe the speaker membrane is damaged, in which case you will need to replace the module. The cost of the original speaker for the Mi 9T is about 800-1200 rubles, the replacement work in the service center will cost 1000-1500 rubles. Before visiting the workshop, check whether your device is guaranteed - in this case, the repair can be free.

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Before disassembling the smartphone, be sure to turn off the battery (or wait for a full discharge) - a short circuit can disable the motherboard.

7. Alternative ways to improve sound

If you can’t turn up the volume, consider alternative solutions:

• 🎧 Bluetooth speakers or headphones: even budget models (such as Xiaomi Mi Portable Speaker) sound louder than the built-in speaker.
• 🔊 Sound amplifier with AliExpress: external modules with a battery (price from 500 rubles) are connected through a 3.5 mm connector and amplify the signal.
• 📱 Mode "For hearing": in Settings → Special facilities → Activate this feature – it optimizes frequencies for better audibility.
• 🎵 Normalization of sound in the player: in Google Play Music or VLC Turn on the "Normalize Volume" option, which will level the sound level between the tracks.

If you listen to music through a speaker often, pay attention to the uniformity of the sound. On the Mi 9T, the bottom speaker (located to the right of the USB-C connector) is usually louder than the top one. This is normal — stereo on smartphones is implemented due to the difference in the volume of the channels. To balance the sound, you can use applications like SoundAssistant, which allow you to adjust the balance of the left / right channel.

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When listening to music through the speaker, keep the smartphone grille down - this improves acoustics due to the reflection of sound from the surface.

FAQ: Frequent questions about volume increase on Xiaomi Mi 9T