Weak sound in headphones Xiaomi Redmi 8 Pro: 12 reasons and how to fix them

You've connected your headphones to the Xiaomi Redmi 8 Pro, but you can barely hear the sound even at maximum volume? The problem with weak headphones on this model is more common than you think. The causes can be in both the banal settings of the smartphone and hardware malfunctions, from oxidized connector contacts to damage to the sound chip. In this article, we will analyze all possible causes of quiet sound and give step-by-step instructions for their elimination, from simple to radical.

The Redmi 8 Pro features a separate headphone amp (unlike many budget smartphones), but suffers from the software limitations of MIUI. For example, the Safe Volume feature reduces the sound level by default, and it is not always possible to update the firmware without losing sound quality. We tested all methods on real devices and selected only working solutions - without general tips like "reboot the phone."

1. Checking basic sound settings

Before you take your smartphone apart or bring it to the service, make sure the problem isn't with the standard settings.There are a few pitfalls on the Redmi 8 Pro that users often miss:

• 🔊 Do Not Disturb: Can block the sound in the headphones under active rules (e.g., "Alarm clocks only"). → Sound and vibration → Don't disturb.
• 🎧 Separate volume for headphones: on MIUI The volume of the speakers and headphones is adjustable independently. Make sure the headphone slider is at maximum (press the volume button). → tap on the gear icon).
• 🔄 Sound Profile: in Settings → Sound. → Sound profiles can be selected in either Quiet or Meeting mode, which limits volume.

It’s also worth checking if Adaptive Sound is activated (some versions of MIUI call it Smart Volume) and it automatically lowers the volume in the headphones if the smartphone thinks the level is too high. Disables in Settings → Additional → Special Features → Adaptive Sound.

2. MIUI Program Restrictions

The Xiaomi Redmi 8 Pro is powered by MIUI, which is known for its “concerns” about user safety, one of which is the “Safe Volume” feature, which by default limits the maximum sound level in the headphones to 80% of the actual power, which is designed to protect hearing, but many users consider this limit excessive.

To turn it off:

1. Go to Settings → Sound and vibration → Safe Volume.
2. Turn off the slider "Limit the volume of headphones."
3. Confirm the action (a password or pattern lock may be required).

If this item is not in your version of MIUI, try an alternative way through the application permissions:

• Open Settings → Applications → Application Management.
• Find the Music app (or the one you play the sound through).
• Go to Permissions → Other permissions and turn on “Ignore Volume Limit.”

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If after turning off the "Safe Volume" sound is still quiet, try resetting the sound settings to the factory: Settings → System → Resetting → Resetting the sound settings.

Problems with the 3.5mm connector

Redmi 8 Pro is equipped with a classic 3.5 mm connector, which can eventually fail.

• 🔌 Contact oxidation: moisture or sweat leads to corrosion, causing the signal to be transmitted with interference.
• 🔧 Untwisted connector: if the headphone plug is not tightly fixed, contact is interrupted.
• 💥 Damage to soldered connections: when falls or jerks of the headphone cable, contacts on the board can go away.

For diagnosis:

1. Put your headphones on, and you can move the plug a little bit, and if you hear it, it goes away, and it's a problem with the contacts.
2. Try other headphones (preferably with a microphone to check all the connector contacts).
3. Light the connector with a flashlight: if you see darkening or green plaque, it is oxidation.

Decisions:

• 🧹 Clean the connector: Use a cotton swab dipped in alcohol (at least 70%). scroll carefully inside the connector, then dry for 10-15 minutes.
• 🔧 Bending contacts: if the connector is loose, you can gently bend the tongue inside (requires disassembly of the phone).
• 🛠️ Replacement of the connector: if the contacts are damaged, you will need soldering of a new connector (cost in the service - from 800) ₽).

4. Damage to the sound chip or amplifier

If the sound is quiet in all headphones, and the connector is clean and serviceable, the problem may lie in the hardware:

• 🔊 Sound amplifier malfunction: Redmi 8 Pro uses a separate chip to amplify the signal in headphones (usually Realtek) ALC5640 When it's damaged, the sound becomes quiet or distorted.
• 💾 Sound codec problems: It's responsible for processing the audio signal, and it can cut frequencies when it fails, making the sound muffled.
• 🔋 Underpower: If the battery is worn out, the chips may not receive enough voltage, which affects the volume.

Diagnosis:

• Connect your headphones to another device (PC, laptop), and if the sound is normal, the problem is with your smartphone.
• Check the sound through Bluetooth headphones, and if it's loud, the wired headphone jack or amplifier is faulty.
• Record the sound from the microphone (for example, voice recording). If the recording is silent, it is a problem in the audio track of the phone.

Decisions:

• 🔧 Flashing: Sometimes it helps to reset to factory settings or install custom firmware (for example, LineageOS) if the driver problem.
• 🛠️ Board repair: service diagnostics required, it costs 1,500 to 3,000 to replace the amplifier ₽, Sound chips up to 5,000 ₽.

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If the sound is silent after the phone falls or moisture gets in, there's a 90 percent chance that the hardware malfunction is to blame, and then the software won't help, you need repairs.

5. Impact of firmware and updates

MIUI receives regular updates, but not all are optimized for the audio system. For example, after upgrading to MIUI 12.5, many Redmi 8 Pro users complained about the volume drop in their headphones.

• 📱 Driver errors: New firmware versions may contain bugs that affect the sound stack.
• 🔇 Changes to volume policy: Xiaomi may tighten restrictions on EU or local regulators.
• 🗑️ Conflict with user settings: after the update, individual sound parameters are reset.

How to turn back the volume:

1. Firmware rollback: 1. Download the old version MIUI For Redmi 8 Pro from Xiaomi Firmware Updater. 2. Go to Settings → The phone. → Updating the system → tap the icon «⋮» → «Select a firmware file.” 3. Install the downloaded file and restart the phone.
2. Reset: Go to Settings → System → Resetting → Resetting all settings (data will not be deleted, but audio settings will return to factory settings).
3. Custom core installation: For advanced users, cores like FrancoKernel or ElementalX can improve sound processing, but require root rights.

After upgrading to MIUI 13 on the Redmi 8 Pro, some users reported a 30 to 40 percent drop in volume, which is due to a change in the audio processing algorithms in the new version, and a 80 percent rollback to MIUI 12.5 solves the problem.

6. Headphone problems

Sometimes the silent sound is not caused by the smartphone, but by the headphones themselves, especially for high-impedance models that require a powerful amp.

How to check the headphones:

• 🔍 Cable inspection: Bending or scuffing can lead to a break in the veins, which reduces the volume.
• 🎛️ Test on another device: if the sound is quiet everywhere – the headphones are faulty.
• 🔊 Membrane check: the muffled sound may be due to a rupture of the diffuser (often found in cheap models).

Check the headphones on another device|Check the cable for damage.|Test the microphone (if you have one)|Try out other headphones on the Redmi 8 Pro-->

7. Alternative ways to amplify sound

If standard methods don't work, you can try software amplifiers, which act as a middle ground between the system and the headphones, increasing the volume through processing algorithms.

The best apps for Redmi 8 Pro:

• 🎵 ViPER4Android: It requires root rights, but it gives you fine-tuning of the equalizer and the amplifier. XDA Developers.
• 🔊 Equalizer FX: works without root, has pre-settings for different genres of music.
• 🎧 Wavelet: Supports LDAC and aptX, amplifies the sound for Bluetooth headphones.

Instructions for setting up ViPER4Android:

1. Install. APK-file and driver (root required).
2. Open the app and go to Master Limiter.
3. Increase Pre-Amp to +3...+6 dB (no more, otherwise there will be distortions!).
4. Turn on Convolver and select Super Bass or Clear Highs.

⚠️ Warning: Excessive amplification of sound through software can cause the amplifier to overheat or damage the earphone speakers. +6 dB and monitor the temperature of the phone.

8. When to contact the service

If you've tried all the methods, but the sound on the headphones is still quiet, the problem is probably hardware.

• 🔊 The sound is quiet in all headphones, including Bluetooth.
• 💥 The problem appeared after a fall, impact or moisture hit.
• 🔌 3.5 mm connector is shattered or does not fix the plug.
• 🔋 The phone overheats when playing the sound.

Cost of repair in the service:

⚠️ Note: make a backup copy of the data before repair, in some cases (for example, when replacing the motherboard), information may be lost. IMEI Serial phone number is important for the guarantee and operation of networks.

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If the phone is warranty, do not open it yourself! contact the official service center Xiaomi - repair warranty can be free (provided that the problem is not caused by mechanical damage).

FAQ: Frequent questions