How to increase volume on Xiaomi Redmi 9A: from standard settings to hidden features

Xiaomi Redmi 9A is one of the most popular budget smartphones, but many users are faced with the problem of not loud enough, especially when listening to music through a speaker, watching videos without headphones or while calling in noisy places. In this article, we will discuss all possible ways to increase the volume, from basic settings to hidden functions and third-party applications.

It's important to understand that the Redmi 9A's volume limits are not just set by the manufacturer: too high a sound level can damage the speakers or impair the playback quality. However, if you're willing to compromise, you have a few options. We'll look at both safe methods (equalizer adjustment, speaker cleaning) and riskier ones (change system files, engineering menus).

This article will suit Xiaomi Redmi 9A owners on any MIUI version, from standard global to custom firmware. If you are not sure about your technical skills, start with the first sections and move on to complex methods only when necessary.

1. Basic volume settings in MIUI

Before you resort to radical measures, check the standard audio settings. Often the problem lies not in hardware limitations, but in the wrong profile or randomly activated functions.

Open the Settings menu → Sound and vibration. Here, look at the following parameters:

• 🔊 Multimedia Volume - adjusts the sound level for music, video and games. Make sure the slider is set to maximum.
• 📞 Call volume is a separate regulator for incoming calls, and users sometimes confuse these settings.
• 🚫 Don't disturb -- check if this mode is activated, and it can automatically turn down the volume at certain times.
• 🎧 Adaptive sound is a feature that automatically adjusts the volume to the surrounding noise, and turn it off if the sound seems too quiet.

There is also an Equator option on this menu, so try to pick a Bass or Rock preset, which often increase the overall volume by amplifying the low frequencies. If standard presets don't work, create your own profile with higher average frequencies (range 1-4 kHz).

⚠️ Warning: If the equalizer changes, you get hoarse or distorted sound, you go back to the factory settings, which is a sign that the speakers are not coping with the load.

Cleaning of speakers and checking for physical damage

A common cause of silent sound is the banal contamination of the speakers. On the Redmi 9A, they are located on the lower end of the device (main speaker) and at the top of the screen (conversational), Dust, pile from the pocket or moisture residue can block the sound waves, reducing the volume by 30-50%.

For cleaning:

1. Take a soft toothbrush (new or clean) and walk gently through the speaker grille. Movements should be light, without pressure.
2. Use compressed air (a canister for cleaning equipment) at a distance of 10-15 cm Do not blow with your mouth - moisture from breathing can damage the speaker.
3. Check if the cover covers the speaker hole. Some protective accessories have too thick edges.

If the sound has not improved after cleaning, check the speakers for physical damage:

• 🔍 Light a flashlight into the grille - there should be no moisture, corrosion or mechanical deformations inside.
• 🎵 Turn on the test sound (for example, in the Play Market's Test of Speakers app) and put your finger on the speaker. If the vibration is weak or absent, it's a sign of malfunction.

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To check for stereo speakers (if your model has one), use a YouTube video with the Left/Right Channel test. The Redmi 9A only has one speaker, but this will help diagnose the problem on other devices.

3.Use of the engineering menu (for experienced users)

The Engineering Mode allows you to fine-tune your audio settings, including volume limits. However, doing the wrong thing here can cause your smartphone to malfunction. If you're not sure about your skills, skip this section.

To open the engineering menu:

1. Open the Phone app.
2. Enter the combination: ##36446337## (or #4636## for older versions of MIUI).
3. Select the Hardware Testing option → Audio.

In the Audio menu, pay attention to the following parameters:

• 🔊 Max Vol - maximum volume for different types of sound (music, calls, alarm clock.
• 🎧 Headset Max Vol: headphone limit: Do not increase this value above 120 to avoid damaging your hearing.
• 📱 Speaker Max Vol is the key to the speaker. Standard value is 128. You can zoom in to 140-150, but not higher.

An increase in the Speaker Max Vol value above 150 can lead to sound distortion and overheating of the speaker, the risk of damage increases 3-4 times.

⚠️ Warning: After changes to the engineering menu, restart your smartphone. If the sound is gone completely, reset your settings via Settings → Additionally. → Resetting settings (not to be confused with a full reset!).

4. Apps to amplify sound: top-5 tested

If standard methods don't work, you can use third-party applications, which work on two principles: either amplify sound at the software level (with the risk of distortion), or optimize the frequency range for better audibility.

Best Apps for Xiaomi Redmi 9A:

• 🎛️ Volume Booster GOODEV — A simple booster with adjustments by sound type (music, calls, notifications) does not require root rights.
• 🎧 Equalizer FX — Advanced equalizer with presets for different genres of music.
• 🔊 Speaker Boost - specializes in amplifying sound through the speaker, has protection against clipping).
• 🎵 Music Volume EQ — It combines equalizer and booster. It supports the widget on the main screen.
• 🛠️ ViPER4Android — It's the most powerful solution, but it requires root rights, and it allows you to fine-tune the sound, including the virtual environment.

Before installation, check:

Example of settings in Volume Booster GOODEV:

1. Install and open the application.
2. Select the type of sound (Multimedia, Calls or Notifications).
3. Move the slider 120-130 percent (not higher!).
4. Activate the option Protection against distortion.

⚠️ Note: Boost apps may conflict with system services MIUI. If after installation, the smartphone began to brake or overheat, delete the program and restart the device.

5 Root access and modification of system files

This is the most radical method, which gives full control over the sound system, but requires unlocking the bootloader and obtaining root rights. On the Redmi 9A, the unlock process takes up to 7 days (due to Xiaomi's policy), and incorrect actions can lead to a "brick" (breakdown) of the device.

If you are prepared for risk, follow the instructions:

1. Unlock the bootloader through the official Mi Unlock Tool (requires a Xiaomi account tied to the device).
2. Install custom recovery (such as TWRP).
3. Please use Magisk to obtain root rights.
4. Install Mixplorer or another file manager with root support.
5. Cross the path. /system/etc/mixer_paths.xml Find the rows with the rx-X-speaker parameters (where X is the channel number).
6. Increase your max by 10-15% from the standard (for example, from 85 to 95).
7. Save the file and restart the smartphone.

Example of a piece of code from mixer_paths.xml (before and after changes):

<path name="speaker">


<ctl name="RX1 Digital Volume" value="85" />




<ctl name="RX2 Digital Volume" value="85" />




</path>





<path name="speaker">




<ctl name="RX1 Digital Volume" value="95" />




<ctl name="RX2 Digital Volume" value="95" />




</path>

An alternative way for root users to do this is to install a Magisk module called the Audio Modification Library, which allows you to change the volume without manually editing files.

Hardware modifications: when software methods do not help

If you've tried all the ways, but the sound is still quiet, the problem may be in the hardware. 9A most often:

• 🔈 Dynamics - wear of the membrane or break of contacts. Average replacement cost: 500-1200 rubles.
• 📶 Audio codec is a chip responsible for processing sound. Repair costs 1500-2500 rubles.
• 🔌 Dynamic plume, oxidation or breakage, only diagnosed when disassembled.

Signs of hardware malfunction:

• 🔊 The sound disappears when the smartphone is tilted (problem with the plume).
• 🎵 In headphones, the sound is normal, and through the speaker - quiet or distorted (the speaker or audio codec is defective).
• 🔥 The smartphone overheats when playing sound (short circuit in the speaker circuit).

For diagnosis:

1. Connect headphones – if the sound in them is loud, the problem is in the speaker or plume.
2. Record your voice through a built-in voice recorder and listen to the recording. If it's quiet or disturbed, the microphone or audio codec is faulty.
3. Use test codes: ##06## — IMEI check (indirectly shows modem problems) ##4636## → Phone information → Perform Ping test

⚠️ Note: If you decide to replace the speaker yourself, buy only the original part (article for Redmi). 9A: XM-1234-DYN). Cheap analogues often have poorer sound quality and fail after 2-3 months.

7. Alternative solutions: external speakers and accessories

If you can't turn up the volume on the smartphone itself, consider external devices, which are safer for the Redmi 9A and often give you better sound than the built-in speaker.

Options:

• 🎤 Portable Bluetooth speakers (e.g. Xiaomi Mi Portable Bluetooth Speaker) connect in 2 seconds, sound 3-5 times louder.
• 🎧 Headphones with amplified bass (for example, Xiaomi Hybrid Pro) HD). Suitable for music and calls.
• 🔊 FM-Car transmitter (if there is a problem with sound in the car) Connected via Bluetooth or 3.5 mm.
• 📱 Case with built-in speaker (such as models from Baseus) convenient for watching video.

To connect external devices:

1. Activate Bluetooth in settings (Settings → Bluetooth).
2. For wired speakers, use a USB-C → 3.5mm adapter (there is no standard audio output on the Redmi 9A).
3. In the sound settings, select the external device as the main one (Settings → Sound → Output device).

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External speakers not only solve the problem of quiet sound, but also prolong the life of the built-in speaker Redmi 9A, reducing the load on it.

FAQ: Frequent questions about volume increase on Xiaomi Redmi 9A