How to increase the volume of the speaker on Xiaomi Redmi 9A: from settings to engineering menu

Xiaomi Redmi 9A is one of the most popular budget smartphones, but many users face the problem of quiet sound from the auditory speaker, especially when talking, listening to music through a speaker or playing video without headphones. In this article, we will examine all possible ways to increase the volume, from standard settings to hidden functions of the engineering menu.

It's important to understand that quiet sound isn't always about hardware constraints, and often the problem is software settings, clogged connectors, or even firmware. We've tested all methods on Redmi 9A with different versions of MIUI (including global and Chinese), so the instructions are relevant for most users.

If you've tried to turn up the volume through the slider in the notification curtain, but the result didn't work, don't rush to bring your phone to the service. In 80 percent of cases, you can solve the problem yourself in 5 to 15 minutes. Let's start with the simplest ways and gradually move on to more complex ones.

1. Checking basic sound settings

Before digging deeper, make sure all standard settings are set up correctly. Often users miss the obvious moments that cause volume to be artificially limited.

Open the Settings → Sound and vibration and check:

• 🔊 Media volume - should be at maximum (slider at the top) Separately check the volume for calls and notifications.
• 🎵 Do Not Disturb Mode - if it's activated, the sound may mute. Turn it off or set exceptions.
• 📱 Sound Profile – Select “General” or “On the street” (some firmwares have separate presets).
• 🔄 Adaptive sound – the feature automatically adjusts the volume to the ambient noise. Try turning it off if the sound is quieter after the update.

Also, look at the individual settings of the apps. For example, YouTube or Spotify may have a volume control that override the system settings. Go to the app, play the content, and click on the speaker icon in the control panel, sometimes there is an additional slider hidden there.

Cleaning speaker and connector 3.5 mm from dust

One of the most common causes of silent sound is contamination of the speaker or audio jack, and dust, pile from your pocket, or even small particles can block the speaker's membrane, causing the sound to become muted or distorted.

To clean the speaker:

1. Take a toothpick (not metal!) or a soft brush (like makeup).
2. Carefully run the speaker without pressing to remove visible contamination.
3. Use a compressed air spray (to clean keyboards) to blow dust out of the slits. Hold the balloon vertically at a distance of 5-7 cm.

To clean the 3.5mm connector (if you use wired headphones):

• 🕯️ Light a flashlight into the connector - if dust or oxidation is visible inside, carefully remove it with a cotton swab soaked in an alcohol solution (at least 70%).
• 🔌 Insert and remove headphones 3-4 times to clear contacts from possible plaque.

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If the sound is better after cleaning, but not perfect, try playing the audio test at 1000 Hz (youtube) to help identify distortions that are not noticeable in a normal listening session.

If the speaker is making wheezing or crackling, it may indicate membrane damage, and if that's the case, it's only going to help if you change the speaker at the service center, but before you carry the phone for repair, try the other ways in this article -- sometimes the problem is solved software.

3.Use of engineering menu to increase volume

Engineering Mode is a hidden settings section where you can manually adjust audio settings, including the maximum volume of the speaker.This method works on most Xiaomi devices, but requires caution: incorrect settings can lead to distortion or damage to the speaker.

To open the engineering menu:

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

In the Audio section, you are interested in the following parameters:

• 🔊 Speaker Mode – Select Normal Mode (If Headset Mode is the best option, the sound will be quieter).
• 📊 Max Vol – here you can increase the maximum volume value for different types of sound: Media – music, video; Ring – calls; Sip – VoIP calls (WhatsApp, Telegram); System – notifications.

Recommended values for Redmi 9A:

⚠️ Warning: Increases above 180-200 can cause overload damage to the speaker. If the changes cause wheezing or the sound starts to break, return the standard settings.

4. Installation of third-party applications to amplify sound

If standard methods didn't work, you can use Google Play apps that amplify sound through software processing, and the main advantage of this approach is that you can fine-tune the equalizer and compression.

Top.-3 Proven applications for Redmi 9A:

• 🎛️ Equalizer FX — Free equalizer with presets for different genres of music, allowing you to increase the volume by 20-30% without distortion.
• 🔊 Volume Booster GOODEV — It's a simple volume-adjusted booster for speaker, headphones and Bluetooth.
• 🎧 Precise Volume – allows you to set the volume to 1% accuracy, bypassing restrictions MIUI.

How to configure Equalizer FX for maximum effect:

1. Install the application and open it.
2. Turn on the sound amplifier option and move the slider 80-90%.
3. In the Equalizer section, select Bass Booster or Rock presets, which amplify low and medium frequencies that are better perceived on smaller speakers.
4. Activate. 3D-lens-proof.

Set the amplifier volume to 80-90%|Choose a Bass Booster or Rock Preset|Activate 3D-effect|Disable the volume limiter in the application settings-->

Important: Some applications require permission to modify system settings. If the sound hasn't changed after installing the booster, go to Settings → Applications → Special Rights → Modification of system settings and enable access for the selected application.

⚠️ Warning: When using sound boosters, the battery discharge increases by 10-15%, as the additional processor processes the audio stream.

5. Update MIUI and reset sound settings

Sometimes quiet sound is associated with firmware bugs, especially if the problem has appeared after an update. Xiaomi regularly releases patches to fix audio issues, so check the relevance of your version of MIUI first.

How to update firmware:

1. Go to Settings → About the phone → System update.
2. Click Check for updates.
3. If a new version is available, download it and install it. After upgrading to MIUI 12.5+, many users reported a 15-20% improvement in loudspeaker volume.

If the update didn’t help, try resetting the sound settings to factory:

1. Open Settings → System and device → Resetting settings.
2. Select Resetting Sound Settings (not to be confused with a full reset!).
3. Confirm the action and restart the phone.

This reset removes all custom equalizer settings, volume limits, and returns the speaker settings to standard values. After rebooting, check the sound – often this solves the problem if it was caused by a failure in the configuration files.

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Updating MIUI to the latest version is a must before drastic measures (such as flashing), and in 30% of cases, a soft sound is corrected by a patch from Xiaomi.

6. Checking for hardware malfunctions

If none of the software methods worked, the problem could be in the hardware, and here are the signs that indicate a speaker or audio track malfunction:

• 🔇 The sound disappears completely or becomes very quiet even at maximum.
• 🔊 When playing, extraneous noises are heard (cracking, squeaking, wheezing).
• 📱 The sound works only in headphones, not through the speaker (or vice versa).
• 💥 The speaker stopped working after falling or getting moisture.

To diagnose the problem:

1. Check the speaker on other content -- play music, video, voice recording. If the sound is quiet everywhere, the problem is the dynamics.
2. Connect the headphones - if the sound in them is normal, and through the speaker is quiet, it's about it.
3. Record your voice and play it back. If your voice sounds soft or distorted, your microphone or audio codec may be faulty.

The most common hardware malfunctions of Redmi 9A:

If you suspect a hardware malfunction, you should contact a service center: the average cost of replacing a speaker with a Redmi 9A is 800-1500 rubles (depending on the region), self-repair without experience can damage the plumes or motherboard.

7. Alternative methods: Bluetooth speakers and external amplifiers

If you can’t raise the volume of the speaker, but you need a powerful sound, consider alternative options:

• 🎧 Bluetooth speaker – even budget models (for example, Xiaomi Mi Portable Bluetooth Speaker) sound 3-5 times louder than the built-in speaker.
• 🔊 External amplifiers – devices like FiiO A1 connect to the 3.5 mm connector and amplify the sound without distortion.
• 📱 FM-transmitter – transmits sound from the phone to car or home acoustics FM-frequency.

For the Redmi 9A, we recommend:

• Xiaomi Mi Bluetooth Speaker 2 is a compact speaker with a volume of up to 85 dB, running time of 10 hours.

If you often listen to music through a speaker, an external speaker is the best solution – it’s not only louder, but also keeps the sound quality at high volumes (as opposed to an overloaded onboard speaker).

FAQ: Frequent questions about the sound on Xiaomi Redmi 9A