What if the stereo is noisy?

The problem of speaker noise is caused by multiple faults, so what are the common reasons? I will introduce you to the causes and solutions of noise in the sound, hoping to help you!

Satellite speaker damaged

A large part of the problems caused by the noise of speakers are caused by the damage of satellite speakers or sub-boxes. This failure may be caused by the amplifier circuit of the speaker or the speaker itself.

Solution: If this is really the reason, it's a pity that we can't solve the problem fundamentally, so we have to repair your speaker.

Document quality problem

Nowadays, online music is popular, and many songs are downloaded from the internet, which is very convenient to use. But it is precisely because of this open platform that the quality of documents is mixed. For example, some music files are not small when they are downloaded, but the quality is not very high, and noise will be generated when they are played. This is a problem in the process of document suppression, which is almost impossible to solve.

Solution: We can only improve the quality of music files, and there is no other way.

Incorrect line input

Whether it is a 2. 1 speaker or a 2.0 speaker, there are connecting wires from the sound source to the speaker, that is, signal wires for line input. If this signal line is not connected properly, it is likely to produce noise. For example, the general 3.5mm signal line is a two-stage plug. If you don't plug it in, there will definitely be noise, even a silent channel. Of course, if the line input is not true, it will also cause the chassis itself to leak into the audio line, and the noise will be more serious.

Solution: Plug in the signal wire and ground the chassis.

Causes of mobile phone interference

If there is noise in the speaker only under special circumstances, it can almost be judged that it is a problem of mobile phone interference: the speaker works normally most of the time, and when a phone call or text message comes in, the speaker will have regular noise, which leads to abnormal use. In fact, this has something to do with the amplifier of the speaker. With the large-scale popularization of class D digital power amplifier, this phenomenon is expected to disappear.

Solution: Take away the mobile phone and replace it with a set of digital amplifier speakers.

Sound card driver problem

This phenomenon is very rare and atypical. It only happens on special occasions. I met it once anyway. There is a new noise in the speaker, and all the troubleshooting methods have not been improved. After reinstalling the sound card driver, the fault disappeared. Don't throw away your speaker in the most desperate time, try changing the sound card driver.

Solution: Reinstall the sound card driver or replace it.

Causes of electromagnetic interference

Electromagnetic interference is mainly divided into power transformer interference and stray electromagnetic interference.

The interference of power transformer is caused by the leakage of multimedia speakers. When conditions permit, the effect of installing a shielding cover for the transformer is very obvious, which can block the magnetic leakage to the greatest extent. The shield can only be made of iron-based materials. Try to choose products with big brands and solid materials. In addition, using an external transformer is also a good solution.

Stray electromagnetic interference is very common, and speaker cables, frequency dividers, wireless devices or computer hosts will all become interference sources. The main speaker should be as far away from the computer host as possible to reduce the surrounding wireless devices. Mechanical noise is unique to active speakers. In the working process of power transformer, the vibration of iron core caused by alternating magnetic field will produce mechanical noise, which is very similar to the hum of fluorescent lamp ballast. Choosing good quality products is still the best way to prevent this noise.

Potentiometer used for a long time

When the potentiometer is used for a long time, the metal brush and the diaphragm will have poor contact due to dust accumulation and wear, and noise will be generated when rotating. If the screws of the speaker are not tightened, the inverter tube is not handled properly, and mechanical noise will also be generated when playing large dynamic music. This thermal noise can be dealt with by replacing low-noise components or reducing the workload of components. In addition, lowering the working temperature is also one of the effective methods.

The volume is too loud.

Some computer speakers also make noise when the volume is turned too high. The reason for this situation may be that the output power of the power amplifier is small, which can not avoid the large dynamic peak signal at the moment of music, or the loudspeaker is overloaded and distorted.