How to improve the sound on Xiaomi Redmi 7: from settings to upgrades to iron

Xiaomi Redmi 7 is one of the most popular budget smartphones, but its speakers and sound system are often a weak point: owners complain about quiet sound, lack of bass, distortions at maximum volume and weak detail when listening to music.

In this article, we’ll look at 12 proven ways to improve sound on Redmi 7, from basic MIUI settings to custom firmware and iron upgrades, how to set up the built-in equalizer, what apps to use to amplify sound, how to fix a quiet microphone, and why even budget headphones can sound better than built-in speakers. All methods are tested on current versions of MIUI and do not require root rights (unless otherwise indicated).

Importantly, some ways can affect the autonomy or stability of the smartphone, and we have noted these moments with special warnings.

1. Set up the built-in MIUI equalizer

The standard equalizer in Redmi 7 is hidden in the audio settings, but it allows you to significantly improve the music playback, by default it is turned off, and its presets are optimized for the average user, not for quality sound.

To open the equaliser:

1. Go to Settings → Sound and vibration → Sound quality.
2. Activate the Equalizer slider.
3. Choose a preset (like Bass or Rock) or set up the sliders manually.

For the best result, we recommend the following settings (suitable for most genres of music):

• 🎵 60 Hz (bass): +4 dB
• 🎵 230 Hz (lower middle): +2 dB
• 🎵 910 Hz (medium frequencies): 0 dB
• 🎵 3.6 kHz (upper middle): -1 dB
• 🎵 14 kHz (high): +1 dB

⚠️ Attention: Excessive bass reinforcement (more) +6 dB) can cause distortions at high volume, especially on cheap headphones.

If your version of MIUI does not have an equalizer, upgrade your firmware or use third-party apps (see the next section).

2.Sound enhancement applications (without root)

Standard MIUI settings are limited, but there are apps on Google Play that can significantly enhance the audio experience. We tested 5 of the most effective solutions for Redmi 7:

For most Redmi 7 users, Equalizer FX is the best choice – it’s easy to set up and works with all apps. If you need a more nuanced setup, try Wavelet (especially if you use headphones with known frequency control).

Important: ViPER4Android requires root rights and may conflict with some MIUI firmware. On Redmi 7, installing it often results in system reboots.

Install the app from Google Play|

Open the settings and select "Global Sound" |

Activate Bass-Bust at 5-7 dB|

Turn off the Virtualizer (it spoils the sound on mono speakers)|

Save the preset and restart the player-->

3. Volume amplification through the engineering menu

Redmi 7 has a hidden engineering menu where you can increase the maximum volume of speakers and headphones, which works without root, but requires caution - excessive amplification can damage the speakers.

Instructions:

1. Open the Phone app and enter the code: ##36446337###.
2. Go to the Hardware Testing → Audio section.
3. Select LoudSpeaker Mode (for speaker) or Headset Mode (for headphones).
4. In the Max Vol field, increase the value from 160 to 180-200 (no more!).
5. Press Set and restart the phone.

⚠️ Note: Setting a value above 200 can cause physical damage to the speaker. On the Redmi 7, the optimal value is 180 for the speaker and 190 for the headphones.

When you change the volume, it does get higher, but you can get distortions at the maximum level. If the sound is "hrilling," reduce the value by 10-20 units.

4. Correcting a quiet microphone during calls

Many Redmi 7 owners have trouble hearing their voices while talking, usually because of microphone settings or contamination of the microphone’s opening.

Solutions:

• 🔊 Cleaning the microphone: Use a toothpick (not metal!) or compressed air to remove dust from the microphone hole (located at the bottom next to the connector). USB-C).
• 🔊 Sensitivity setting: In the engineering menu (##36446337##) Go to Audio. → Mic → Mic Gain and increase the value of the 0 before 3-4.
• 🔊 Disabling noise reduction: In some firmware MIUI Noise reduction is too aggressive. Turn it off in Settings. → Sound. → Improving voice.
• 🔊 Headphone check: If the problem only occurs with the headset, try another kit - the microphone on the cable may be faulty.

If the microphone still works poorly after all the manipulations, the problem may be a hardware breakdown, in which case only replacing the microphone module (the cost of repair is from 500 rubles) will help.

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Before calling, turn on speakerphone for 2-3 seconds, and then switch back to normal mode. This sometimes "wakes up" the microphone if it was blocked programmatically.

5. Hardware improvements: headphones and external speakers

Even with perfect settings, the Redmi 7’s built-in speakers remain a weak point, with limited power. If you’re interested in quality sound, consider hardware improvements:

Headphones

The following models are suitable for Redmi 7 (tested with Wavelet equalizer):

• 🎧 KZ ZSN Pro X – Best Price/Quality Balance (Bases, Details).
• 🎧 Blon BL-03 — warm sound with an accent on the middle.
• 🎧 Xiaomi Hybrid Pro HD — optimized MIUI.
• 🎧 Sony MDR-XB55AP — maximum basses for amateurs EDM.

External dynamics

If you need a loud sound to watch movies or music in a company, look out for portable speakers:

• 🔈 Xiaomi Mi Portable Bluetooth Speaker – compact, with good bass.
• 🔈 JBL Go 3 – waterproof, volume up to 85 dB.
• 🔈 Tronsmart T6 Plus - for home use (TWS-regime).

When connecting external devices, remember to turn off the built-in MIUI equalizer – it can conflict with the sound processing in the headphones or column.

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Even budget headphones for 1000-1500 rubles will sound better than the built-in speakers Redmi 7. The main thing is to properly configure the equalizer for their frequency.

Installation of custom firmware for audiophiles

If you don't like the sound even after all the settings, you might want to consider installing custom firmware. Redmi 7 has a good track record:

• 📱 Pixel Experience – pure Android with improved sound processing.
• 📱 LineageOS - stable firmware with support ViPER4Android.
• 📱 Havoc-OS – flexible audio settings including Dolby Atmos.

Advantages of custom firmware:

• Support for Dolby Atmos and LDAC (High Resolution Codecs)
• Better sound processing at the system level.
• No MIUI volume limits.

There are, however, downsides:

• Requires unlocking the bootloader and installing TWRP.
• Possible bugs with microphone or speakers (depending on the build).
• Loss of warranty (if it is still valid).

If you decide to do this, follow the instructions from the XDA-Developers forum for Redmi 7 (codenamed onc).

⚠️ Attention: Some custom firmware for Redmi 7 has problems with the second microphone (used for noise reduction) and this can worsen the quality of calls.

7.Diagnostics of hardware problems with sound

If the sound is gone completely or there are extraneous noises (cracking, squeaking), the problem may be hardware.

1. Check the speaker for physical damage: Hold your ear to the speaker while playing music — is there a sound, but very quiet? Put a flashlight into the speaker's grille — is there any debris or moisture?
2. Headphone test: If you have a sound, it's a problem with the dynamics. If you have a sound, try different headphones, if you don't have any, the audio chip is broken.

Microphone check:

• Record the voice memo in the Dictaphone app.
• Call another phone and check if your voice is heard.

Typical hardware faults of Redmi 7:

If the diagnosis shows a hardware problem, contact the service center.Redmi 7 has a modular design, so replacing the speaker or microphone does not take much time.

FAQ: Frequent questions about the sound on Redmi 7