How to increase the volume of the speaker on Xiaomi Redmi 9T: proven methods

Xiaomi Redmi 9T is a popular smartphone with good price-quality ratio, but many users face the problem of a quiet conversational speaker, especially in noisy rooms or when using hands-free. Unlike multimedia speakers, conversational (also known as "top" or "audible") is often limited by the manufacturer to save energy or meet safety standards.

In this article, we will discuss 7 proven ways to increase the volume of the conversational speaker on the Redmi 9T, from standard MIUI settings to hidden engineering menu features. All methods have been tested on current firmware versions (including MIUI 14 based on Android 12/13) and do not require superuser rights (root).

If you are willing to sacrifice a couple percent of battery power for the sake of comfortable conversations, let’s get started!

1. Check basic sound settings in MIUI

Before you go to the engineering menu or install third-party apps, make sure that the problem is not in the standard settings. There are several pitfalls on the Redmi 9T that can artificially turn the volume down:

• 🔊 Do Not Disturb: Check if it is activated in the Sound and Vibration settings → Even in "Alarms Only" mode, it can limit the volume of calls.
• 📞 Voice amplification: c Settings → Special opportunities → Improve hearing: Enable the option "Amprovement of voice during calls".
• 🔋 Saving charge: in Battery mode → Charge saving Some sound functions are turned off automatically.
• 🎧 Connected devices: If Bluetooth headphones have ever been connected to a smartphone, the system may “forget” to switch back to the speaker.

Also worth checking the speaker's physical condition: often dust or mechanical damage worsens the sound. Carefully clean the speaker's opening with a soft brush (for example, for makeup) or compressed air. Do not use sharp objects - this can damage the membrane.

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If the sound gets worse after cleaning, maybe the speaker membrane is deformed, and then the replacement at the service center will help.

2.Use of the Engineering Menu (MTK Engineer Mode)

The Redmi 9T is built on the MediaTek Helio G85 platform, which gives you access to advanced audio settings through an engineering menu, which does not require root rights, but changes the parameters at your own risk!

Instructions for increasing volume:

1. Open the Phone app and enter the combination: ##36446337###
2. Select Hardware Testing → Audio → LoudSpeaker Mode.
3. In the Type section, install Sph (Speak Speaker).
4. In the Level field, change the value from 0 to 5 or 6 (maximum 7, but this can cause distortion).
5. Press Set, then restart the smartphone.

After settings, check the volume during the call. If the sound is hoarse or intermittent, return the Level to 4 or 3.

3. Customization of sound through ADB-teams (without root)

If the engineering menu fails, you can try changing the system audio settings via ADB (Android Debug Bridge), a method that is safer than root rights, but requires connecting the smartphone to a computer.

Step-by-step:

1. Download and install Google’s Platform Tools.
2. Turn on your smartphone to USB Debug in Settings → About Phone → MIUI version (click 7 times, then return to Additional → For Developers).
3. Connect Redmi 9T to your PC and execute on the command line: Adb devices (your device should appear).
4. Enter the command to increase the volume of the speaker: adb shell settings put system volume_music_speaker_scale 15 (significance 15 can be increased 20, But it can lead to distortions).

To reset the settings to the factory use:

adb shell settings delete system volume_music_speaker_scale

Install Platform Tools on PC

Enable USB debugging on Redmi 9T

Connect your phone to the original cable

Check device detection by adb devices

Backup of important data-->

4. Apps to amplify sound: top-3 tested

If manual settings seem complicated, you can use third-party apps, and we tested dozens of utilities and selected the three most effective ones for the Redmi 9T:

Important: applications like Volume Booster don't increase the physical power of the speaker, they only change the processing of the audio signal, which can lead to distortions at maximum volume.

For better results, combine applications with settings from the engineering menu, for example, set Level=5 in the MTK Engineer Mode, and then bring the volume to a comfortable level through Precise Volume.

5. Hardware solutions: cleaning and replacement of the speaker

If the software methods didn't work, the problem could be in the hardware. The Redmi 9T speaker (LK1511A-00) gets dusted or out of order over time. Here's what you can do:

• 🧹 Clean speaker: Use a spray of compressed air (for example, to clean the keyboard) or a soft brush. blow at an angle so as not to damage the membrane.
• 🔧 Contact check: if the speaker is not working at all, the plume may have gone away.
• 🔄 Replacement of the speaker: the original speaker is worth ~300-500 RUB, replacement in the service - more ~800-1200 For Redmi. 9T Suitable speakers from Redmi 9/9A/9C.

Before carrying the phone for repair, check the speaker for performance through the engineering menu:

1. Open ##36446337##.
2. Go to Hardware Testing → Audio → Normal Mode.
3. Select Receiver (Conversation Speaker) and press Play.

If there's sound, but it's quiet, it's a problem with the settings or the firmware, and if there's no sound, the speaker is faulty.

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Before replacing the speaker, check it on another phone (if possible) - sometimes the problem lies in the motherboard, not in the speaker.

6. Alternative methods: Bluetooth and external speakers

If you can not increase the volume of the speaker, consider workaround solutions:

• 🎧 Bluetooth headphones: even budget models (for example, Xiaomi Mi Basic for 1000 rubles) will provide better sound than the built-in speaker.
• 🔊 External speaker: connect via Bluetooth or 3.5 mm audio jack (on Redmi) 9T he is!).
• 📱 Loud communication: in the call settings (Settings) → Calls. → Turn on the option "Always use loud speaker".
• 📲 Call forwarding: Set up a redirect to another phone with better speakers via Settings → SIM-maps and mobile networks → Call forwarding.

For Redmi owners 9T s NFC There is another life hack: buy cheap NFC-tags (about 200 rubles for 5 pieces) and program them to automatically connect Bluetooth headphones when touched. This will eliminate the need to manually turn on the headphones before calling.

7. Update firmware and reset settings

Sometimes the problem with the quiet speaker is solved by a banal update of the system. In new versions of MIUI Xiaomi often optimizes sound profiles.

1. Go to Settings → About the phone → System update.
2. Click "Check Updates."
3. If you have a new version, install it (preferably via Wi-Fi).

If the update didn’t help, reset your settings without losing data:

1. Open Settings → About the phone → Reset settings.
2. Select "Reset all settings" (not "Reset to factory"!).
3. Confirm the action and wait for the reboot.

Warning: Resetting will return all audio profiles to factory settings, including custom settings from the engineering menu, and write down current values (e.g., Level in MTK Engineer Mode) to restore them.

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After resetting, check the Sound and Vibration → Additional settings – sometimes new options appear there that were not in the old firmware.

FAQ: Frequent Volume Up questions on Redmi 9T