Nothing so saddens a car enthusiast on the road or a music lover when listening to their favorite tracks as the sudden appearance of wheezing in the audio system. At the same time, it is often quite difficult to determine the reason why speakers wheeze in completely new acoustics.
Reasons
Wheezing in columns can actually appear at any intermediate stage of signal processing. The main task in this case is to identify the source of failures in the operation of the speaker system, finding a problem area due to which the speakers wheeze. What to do if a failed node is successfully identified will depend on the cause of the breakdown and the nature of the damage.
In most cases, speakers start to wheeze because of the amplifier. The wheezing is then just an audible non-linear distortion. These distortions occur due to insufficient bias of the amplifying element when it is introduced into the linear mode in which the amplifier microcircuit operates.
Without special knowledge in electronic circuits and skills in working with a soldering iron, fix the problem yourself in this situationproblematic, and therefore the wheezing speaker should be taken to a service center.
Wheezing and hissing speakers
Motorists often face a situation when the speaker wheezes or the entire speaker system at once. Most complaints come immediately after installing new speakers or radio in the car. Sometimes the problem is solved in the simplest way.
The fact is that some perceive the hiss of the speakers of the audio system as a wheeze. They observe, turning the radio knob in the car, that when the volume is turned up, the speakers wheeze, although in reality they emit a strong hiss. If it is heard from all connected speakers, then the reason is most likely in poorly compatible speakers and a radio tape recorder. This usually happens when the amplifier power is too high relative to the speaker system.
According to the power of acoustics and amplifier
It is worth noting that the average car radio produces 45-55 watts of power. Car speakers have a power of about 20-40 watts or more. As a rule, manufacturers on boxes and stores in product cards prefer to indicate the peak power of acoustics or RMS-watts. To get a real value, the declared value must be divided by about 10. That is, typical 300-watt speakers give out in reality about 30 watts of nominal volume. All this applies to household computer speakers.
Diagnosis of wheezing columns
You should first analyze situations in which extraneous noises are heard,overtones and wheezing. Only after that you can understand why the speakers or individual speakers wheeze. First you need to answer two basic questions to localize the malfunction:
- Wheezing one speaker or all at once?
- At the maximum or minimum volume, wheezing is best heard?
Wheezing in one speaker or all speakers
Simultaneous wheezing of all speakers is either due to the wrong choice of amplifier (described above), or the problem lies in poor contact, poor-quality wires or a worn out connector on the radio. The latter is possible when all speakers are connected through one input. Simultaneous failure of all speakers is also possible, but this is unlikely.
If only one speaker wheezes, then it is worth checking the contacts for corrosion and the connector on the radio. Similarly, the wire and the quality of contact with the connector are tested. A quick way to test a speaker is to connect a known-good speaker instead. If at the same time the wheezing is gone, the old speaker will have to be changed or repaired.
Wheezing at minimum or maximum volume
The reason why the speaker wheezes at minimum volume is almost always in the speaker itself. Often the wires from the terminal to the coil break off or fray during use. Due to poor contact, wheezing occurs, which can only be eliminated by soldering new wires. It is important to consider that they must be exactly the same in cross section.
Onmaximum volume, most problems occur at the output of the audio amplifier. Distortions in the form of wheezing appear under heavy load. The amplifier cannot cope with it due to a broken capacitor, which must be replaced with a new one. Another reason could be moisture getting into the speaker surround. Replacing a suspension that has stretched from moisture is also acceptable. The third cause of wheezing at high volume levels is considered to be dirt in the dynamics. To fix it, you need to remove the suspension and diffuser, and then gently blow the speaker with a compressor.
These are just the most basic reasons why speakers wheeze. If these manipulations do not lead to a positive effect, then the speakers cannot do without a professional inspection at the service center.
