Detect speaker distortion, noisy sound, quick solution at home.

Karaoke speakers are distorted or make a boiling sound is one of the common errors when using home audio systems, tea rooms or karaoke businesses. Distorted, crackling sounds not only cause discomfort to listeners but also reduce the life of the device. 

The cause may come from incorrect usage habits such as turning up the volume too high, placing the microphone directly at the speaker, adjusting the amplifier out of frequency range... or due to technical problems from the device such as weak amplifier, poor quality signal wire, broken speaker but still continuing to use.

According to Phuc Truong Audio's survey of 800 karaoke systems in Ho Chi Minh City (2024), 68% of cases of speaker distortion can be prevented through usage.

In this article, Phuc Truong Audio will analyze in detail each subjective and objective cause, and at the same time guide how to fix it, and tips for proper use to minimize the phenomenon of karaoke speakers being distorted and noisy.

Why is the karaoke speaker distorted and noisy?

Karaoke speakers are distorted and noisy due to 2 groups of causes: subjective from the user (60-70% of cases) and objective from the device (30-40%). This is a common phenomenon in family karaoke systems, tea rooms and businesses. Distorted and crackling sound not only makes the voice lose its clarity but also makes the listener uncomfortable. 

Below is a detailed analysis of each cause:

Subjective causes from the user side

One of the most common reasons for speaker distortion is that the volume is turned up too high compared to the load capacity. According to Phuc Truong Audio's experience, when speakers with a capacity of less than 200W are forced to operate in a space of over 40m², the speaker coil quickly heats up (reaching 60-80°C), the sound is distorted and easily damaged.

In addition, the habit of pointing the microphone directly at the speaker also creates resonance, leading to long howling, causing the speaker membrane to be under great pressure and quickly degrade.

The way you turn off the speakers and amplifiers also directly affects their lifespan. If you suddenly turn off the power, the components will be shocked before they can stabilize, which will reduce the sound quality over time. 

Similarly, adjusting the amplifier or digital echo incorrectly, such as increasing the Treble or Echo too much, or dividing the Crossover into different frequency ranges, also causes the speaker to carry an inappropriate signal, causing distortion and boiling when turned up loud.

Objective causes from audio equipment

The fault does not always come from usage habits. Many cases of speaker distortion originate from the incompatibility between the amplifier and the speaker. When the amplifier is too weak, the output signal is distorted and does not have enough power to pull the speaker, conversely, the amplifier is too strong, causing the speaker to quickly break down. In addition, if the speaker is broken but continues to be used, the situation will get worse, even causing fire or explosion.

Another cause is from the accessories. Loose or poor quality jacks and speaker cables often cause signal loss, making the sound unstable and creating a crackling sound. Meanwhile, placing the signal cable too close to electronic devices such as phones or laptops can also easily cause interference, making the sound produced have an unpleasant boiling sound.

How to fix karaoke speakers with noise and distortion

To handle it effectively, you need to adjust your usage habits first. Do not turn the volume up to 70-80% of the actual speaker capacity, and keep the microphone at a safe distance, avoiding pointing it directly at the speaker. When turning off the system, follow the correct order: microphone → amplifier → speaker to ensure the safety of the components.

Technically, make sure the amplifier power is compatible with the speaker and regularly check the connection wires. If the speaker shows signs of serious damage, take it to a reputable facility for repair or replacement. 

For karaoke rooms or large systems, consider using a digital echo or mixer with an integrated anti-feedback system to both improve sound quality and limit howling.

How to fix karaoke speakers with noise and distortion

Karaoke speakers that are distorted or making a boiling sound are often caused by misuse or equipment failure. To handle it effectively, users can perform some basic steps at home, and at the same time recognize when to seek the support of a professional technician.

Instructions for self-repair at home

6 steps to fix speaker distortion at home (time: 20-30 minutes):

• Step 1 (2 minutes): Reduce volume to 50-60%, test to see if there is any noise.
• Step 2 (3 minutes): Check and adjust the microphone - speaker position (distance >2m).
• Step 3 (5 minutes): Clean all jacks and connecting wires with alcohol.
• Step 4 (5 minutes): Adjust Bass/Mid/Treble to balance (50%).
• Step 5 (3 minutes): Reduce Echo/Delay below 50%.
• Step 6 (2 minutes): Test again with different volume levels.

Repositioning the speakers high and far away from the singer also helps to reduce howling and distortion.

In addition, it is necessary to clean the jacks, speaker wires and connectors to ensure the signal is not interrupted. If using an amplifier or digital echo, adjust the Bass, Mid, Treble ranges to a balanced level, do not increase the Treble or Echo too much. 

With these errors, users can completely handle them themselves without outside support. If you are not sure how to adjust, you can refer to more instructions from Phuc Truong Audio to apply correctly to your karaoke system.

When to call a professional?

8 cases of severe speaker distortion that require immediate technician call:

1. The speaker is distorted even though the volume is reduced to 50%.
2. There is a burning smell coming from the speaker or amplifier.
3. Speaker coil is abnormally hot (>70°C, cannot be touched).
4. Speaker membrane torn, dented >5mm.
5. Amplifier red light continuously.
6. The noise was accompanied by a rustling, metallic clang.
7. Speaker sounds intermittently, no sound on one side.
8. The crossover circuit has black burn marks.

At this point, it is best to seek the assistance of a qualified technician for a detailed inspection. Reputable audio facilities will have specialized equipment to measure and provide appropriate repair or replacement options. 

How to use speakers without distortion?

To make karaoke speakers work stably, clearly and without distortion, users need to combine proper usage techniques with regular maintenance habits. 

The first principle is to control the volume. Do not open the speaker at maximum level for a long time, because the power exceeding the load threshold will cause the speaker coil to heat up, distort the sound and easily damage the components. Maintaining the volume in the range of 70-80% of the actual power is enough to bring good sound quality and ensure the life of the speaker.

In addition to volume, the arrangement of speakers and microphones also greatly affects the distortion. Microphones placed too close or directed directly at the speakers often cause howling, which over time will degrade the speakers. The solution is to place the speakers higher than the listener's head and turn them outwards, while the microphones need to be kept at a safe distance to avoid resonance. These are simple operations but help the system operate smoothly and limit distortion.

In addition, pay attention to the alignment of the accompanying equipment. The amplifier or digital echo needs to be adjusted to balance the Bass, Mid, Treble ranges, not increasing too much one frequency range causing the speaker to bear an abnormal signal. 

At the same time, you should regularly clean the connecting wires and jacks to ensure stable signal transmission. For those who are not familiar with the operation, it is advisable to consult the instructions from the experts at Phuc Truong Audio will help ensure the speaker is used properly and maintains optimal sound quality.

Which unit provides, maintains and repairs karaoke speakers with prestige and professionalism in HCM?

In Ho Chi Minh City, Phuc Truong Audio is the address trusted by many customers when they need to buy, maintain and repair karaoke speakers. We provide a variety of genuine products, from speakers, amplifiers, digital echo to microphones, ensuring quality and suitable for many different needs.

Not just stop at selling equipment, Phuc Truong Audio also stands out thanks to its specialized technical services. The team of experienced staff always supports installation, calibration and maintenance on-site, helping customers' karaoke speaker systems operate stably, without howling and maintaining durable sound over time.

Frequently asked questions about karaoke speakers

Why does the karaoke speaker howl when singing?

Howling often comes from placing the microphone too close to the speaker or adjusting the volume. digital echo wrong way. Detailed instructions have been shared in the blog How to adjust the microphone to avoid howlingIn addition, you can consider upgrading to a digital karaoke mixer to completely handle the feedback.

Should I install a subwoofer to reduce distortion?

Subwoofer not directly handle the distortion, but when carrying the bass, the main speaker will significantly reduce the load. Thanks to that, the system operates more balanced, limits distortion and reduces the possibility of distortion when opening the volume high. This is also a way to karaoke system for a fuller, more lasting sound.

Karaoke speakers should be combined with amplifier or power amplifier is better?

If the room is small, karaoke amplifier enough to meet. For large rooms or businesses, you should use a power amplifier to pull the speakers more stably.

Do karaoke speakers need a subwoofer?

Subwoofer helps reproduce deep bass, reduce the load on the main speaker and enhance the karaoke experience. Check out karaoke subwoofer models or see the blog Karaoke system with subwoofer and without subwoofer – What is the difference when experiencing sound?

If your karaoke speakers are buzzing, howling or making noise, don't let your music experience be interrupted — visit Phuc Truong Audio for advice, maintenance and upgrades to a standard, durable sound system!