Six common fault solutions for professional audio equipment

Whether it is imported audio or domestic audio, there will always be some failures in the daily use process. The reasons for the malfunction of the audio equipment cannot be analyzed in a one-sided manner, either caused by subjective reasons or affected by objective reasons. The following is a brief explanation of the six common faults and solutions by everyone.

1. There is no sound from the speaker

Turn on the power switch of the speaker, the speaker does not have a "bang" when it is turned on normally. Turn on the MP3 player, adjust the volume, and there is no sound from the speaker. This kind of failure is more common, there is no sound from the speaker after turning on. How do we judge whether the speaker is really broken? First, before powering on the speaker, turn the volume point to the maximum position. When turning on the power switch, pay attention to whether the speaker has a "pop" sound. If so, it means that there is no problem with the speaker, the power supply is good, no sound may be the sound card driver or sound failure, it may be muted or the volume is too low, and the signal cable plug is not well connected The wire is broken. Also, if we touch the plug of the signal cable to the metal part of the chassis, the buzzing hum will be heard from the speaker, which is particularly noticeable.

Second, the speaker sound is inaudible

1. There is sound, but only treble, but no bass. This kind of failure is generally because the volume of the speaker is too loud. If it is used for a long time, the subwoofer is usually burned, or the thread may be broken.
2. There is sound, but the sound is not clear, and the specific sound cannot be heard. In addition to the damage of the tweeter, this kind of fault may also be a broken signal line or a damaged tweeter integrated block.

Third, the speaker is noisy

1. The sound can be played normally, but from time to time there will be a "peep" noise. Some users report that there is no other noise when the computer uses the headset, but only when the speaker is used, it will make a "beep" noise from time to time. Sometimes the time is longer and the advantage time is shorter. At first, I suspected that the audio signal plug was not in good contact, but it was reinserted and unplugged. The problem was not solved by changing the cable. Solution: replace with a new power outlet of good quality.
2. The sound can be played normally, but if you adjust the bass (BASS), the sound of "thunderbolt" will come out of the speaker, which is simply unbearable. Sometimes some speakers will have a "thunderbolt" noise when used, especially when the subwoofer knob is turned, the situation will be more serious. Because it is caused by rotating the BASS button, it is sure that the BASS potentiometer is damaged. Most speakers' volume and subwoofer adjustments use potentiometers to change the strength of the signal. In addition to the new digital tuning potentiometer, the potentiometer changes the position on the carbon resistance sheet through a movable contact To change the resistance value. With the increase of use time, dust and magazines will fall into the potentiometer, and the contacts of the potentiometer may also oxidize and rust, resulting in improper contact. At this time, there will be "thunderbolt" when adjusting the volume Noise appeared. Solution: It is easy to deal with this kind of problem, just replace it with a new potentiometer.

Fourth, the speaker is not used properly

As soon as it is turned on, it will buzz directly, no matter how the volume is adjusted, the noise cannot be eliminated. This situation is generally due to long-term use, coupled with the speaker is closed, the heat can not be dissipated, the internal temperature is too high, and the integrated block is overheated and damaged. In fact, genuine power amplifier integrated circuits all have temperature protection function. When overheated, the power amplifier integrated circuit will automatically stop output. When the temperature drops, it can automatically resume work. However, in order to reduce production costs, some speaker manufacturers use practically integrated circuits that are not famous brands of large manufacturers, but use integrated circuits that are copied by some small factories, and the quality is poor. When I first turned on the computer, the playback sounds were normal, but after a period of use, I buzzed and my ears could not bear it. This kind of fault is the same as the above example, but the power amplifier integrated circuit has not been completely damaged, but the fault only occurs when it is overheated. We can open the case and solve the problem by increasing the area of ​​the IC chip.

5. How to use the speakers correctly

First, we must establish the correct listening concept. Choose speakers, try to use relatively balanced products, do not excessively pursue high-frequency or low-frequency highlights, you should choose sound effects according to music, and don't often maximize the bass sound effect.
Secondly, there must be a healthy ear protection awareness. Since multimedia speakers are near-field devices, we generally use them very close to the speakers. Be careful not to turn up the speaker volume too much, otherwise it will not only damage your ears but also disturb others.

Sixth, the speaker placement is learned

The placement of speaker equipment is most important to the placement of speakers. Special attention should be paid when the speakers are placed against the wall, because the corners will form "standing waves", that is, some sound waves (especially low frequencies) are constantly refracted, which interferes with the music and the music does not sound clear. If you put some expired magazines in the corner, you can produce the effect of absorbing standing waves.
If the space conditions of the house do not allow, you can only put the stereo against the wall and far away from the wall, then you can use this expedient measure-put furniture such as bookcases and wine cabinets on the far side of the wall, Let the sound waves over there be "backing mountains" to refract.
In an ordinary home, the ideal and unharmful sound placement method is: the distance between the sounds is about 2 meters, there is nothing in the middle, and the distance between each sound and the side wall and back wall is more than 0.5 meters (and usually The farther the better, the listener sits in an equilateral triangle with the two speakers. The front of the speaker is slightly inward, facing the listener.