As soon as the sound of the stereo is turned on, there is a magnetic sound 20

In this case, it is very likely that the volume adjustment potentiometer on the speaker is damp or has not been in good contact for a long time.

The volume potentiometer is a physical way to change the resistance, also called adjustable resistance, after a long time, it will be due to too many times of rotation, or there is dirt between the contact surface and the contact piece caused by moisture, and the contact is not good, so there will be a magnetic sound when adjusting.

This is just one case, and there is also a kind of audio that has been used for a long time, and the noise signal generated by the internal op amp circuit is mixed with the audio signal. This is very common. It may be that the resistance value of the resistance has dropped, or the capacitance of the capacitor is insufficient, you can check whether the filter capacitor has exploded.

The last case is the audio cable.

Check the audio connection *** or the audio cable of the computer, as well as the connection. There are 2 types of audio cable connections, 1 is balanced connection: there are 3 wires, 1 ground, 2 +, 3 -

This kind of connection has a very strong anti-interference ability, and it will be connected in some professional occasions such as radio and television stations.

2 are unbalanced connections: there are 3 wires, 1 to ground, 2 to signal, 3 to ground, that is, 1 and 3 short circuit grounding. This is generally our common method, but the anti-interference ability of this method is very poor, and it is not recommended to use very long lines.

You can check it accordingly.

1. Unplug the speaker from the computer and see if there is any noise. If there is, you don't have to look at the following, it's your speaker input that is not well connected.

2. Turn on the machine and plug in the speaker. If your machine isn't on, you don't have to look down.

3. Mute the input devices that are not used temporarily in the volume control. For example, line in; CD IN etc.

4. If there is still noise, you must have the input line of the speaker is not good or the input connection is too long. Let's change to a better line, and the line should not be too long.

Your device is not good enough, try a different Sony one, and the Patriot will do.

It is estimated that the sound of current occurs due to poor contact caused by the aging of the contact port, and it is recommended to polish the audio cable plug with sandpaper.

The line is not connected well, the removal is poor, there is a source of interference, there is a problem with the power amplifier power filter, and the power amplifier regulator is broken, all of the above can cause noise.

Try the power supply Lilin Root Wire Grounding.

Pro, I'm glad to answer the question: Is it normal to use a speaker neodymium magnet to make a loud soundAnswer: Dear, it's normal, there is no problem, how the speaker works The permanent magnet generates a magnetic field in the annular air gap of the magnetic circuit through a yoke, and the voice coil connected to the speaker cone is inserted into the annular air-shock gap.

The permanent magnet is surrounded by an external yoke iron, which avoids interference from external stray magnetic fields. In turn, it can reduce the impact of the magnetic field of the permanent magnet in the outside world. When sound passes through a magnetic field in the form of an electric current, a coil is formed.

Due to the change in the intensity of the current, it will produce different vibration frequencies and then drive the paper cone to emit different frequencies and strong sounds. The use of rare earth permanent magnets NdFeB instead of traditional ferrite or Alnico magnets can not only improve the sensitivity of the speaker, but also greatly reduce the number of magnets used. Magnets in Speakers The two most commonly used magnetic materials for speakers are NdFeB magnets and ferrites.

Both are powerful, but they have their own unique features. The advantages of NdFeB are cost-effective and good mechanical properties, while the disadvantages are low Curie temperature, poor temperature characteristics, easy pulverization and corrosion. Manufacturers of woofer speakers must adjust their chemistry and improve it with surface treatments.

Only in this way can manufacturers of mid-tweeter speakers meet the requirements of practical applications. NdFeB belongs to the third generation of rare earth permanent magnets. It has the characteristics of small size, light weight and strong magnetism.

It is a magnet with a good performance** ratio, and is known as the king of magnets in the field of magnets. I hope it will be useful to you and I wish you a happy life!

Summary. Hello, dear; We're glad to answer your questions! It's normal; The magnetic energy of the same volume of NdFeB magnet is several times higher than that of common horn ferrite magnets, and its advantage is that it can be used in a very small volume to meet the requirements.

Therefore, the weight of the speaker can be greatly reduced, and the overall weight of the speaker can be greatly reduced, which is easy to install and handle, and is usually used in the performance speaker products that need to flow frequently, which can reduce the labor intensity of people.

Hello, dear; We're glad to answer your questions! is taking the key to destroy the normal; Neodymium magnetic horn is the magnet material using NdFeB material, the magnetic energy of the same volume of NdFeB magnet is several times higher than the common horn ferrite magnet, its advantage is that it can be lit sail to use a small volume to meet the requirements. Therefore, the weight of the speaker can be greatly reduced, and the overall weight of the speaker can be greatly reduced, which is easy to install and handle, and is usually used in the performance speaker products that need to flow frequently, which can reduce the labor intensity of people.

Neodymium magnet has a fatal characteristic that the magnetism will change with temperature, we all know that the horn will heat up when working, especially in the case of high-power long-term work, the heat is greater. If it is a performance, the general high-power continuous working time is two or three hours, and the heat generation of the horn is limited. But for entertainment, the working hours of a night are far more than two or three hours of relaxation.

In the case of long-term high-power operation, the heat of the horn gathers, the temperature rises, and the neodymium magnet decreases due to the heating magnetism, and the horn sound will become distorted and uncontrollable. Therefore, it is not that the use of neodymium speakers in speakers is necessarily better than ordinary magnet speakers, and the key depends on what occasion it is used for.

Change the power supply! Current-acoustic power supply problems.

Click on the advanced settings to remove the hook of the microphone's amplification, which is formed by the strengthening of the microphone settings.

The current is too loud, I think your sound quality is not good, change it!

The solution to the failure of the host built-in speaker is as follows:

1. When the built-in speaker of the host is faulty (abnormal noise or no sound), it is recommended that you connect the headphones to test and confirm whether the headphone output is normal. If the sound of the earphone output is normal and the built-in speaker of the host is abnormal, there may be a problem with the built-in speaker of the host, and it is recommended that you report the machine for repair.

Note: Split desktop PCs generally do not have built-in speakers.

2. If you connect the headphones for testing, the sound of the earphone output is also abnormal, it is recommended that you reinstall the sound card driver.

3. After installing the sound card driver, if the problem is solved, it is possible that the fault is caused by a problem with the sound card driver.

4. After installing the sound card driver, if the problem is not solved, please consider restoring or reinstalling the system after backing up the data, or report the machine for repair and let the service station engineer help you detect and repair.

Normal. The computer is running, and after a long time of operation, there must be a sound of electric current rubbing. After a long period of operation, the temperature of the transformer circuit rises.

It should be the current noise generated by the increase in the temperature of the transformer or the entire circuit.

There are two possibilities.

It's your voice friend who is messing with the card driver or a system problem.

The stereo didn't break. If that's the case, when you plug in the stereo, there will be a signal to accompany the silver interference, and it will emit what you say"Magnetomagnetic"Xiangsheng is just no sound.

The solution is to reinstall the driver.

It's your stereo that's broken.

Solution: Change to *** or other audio sources, try the sound to see if there is any sound.

If both are normal, then there is only one last point, but it is basically unlikely that something will happen is that the hello jujube sound card is broken.

Sound change card. Dozens of pieces are sold in computer stores.