Want to know what causes speakers to blow? To avoid permanent damage to music systems it should be known what causes speakers to blow. Blown speakers give out sound of gritted quality and if speaker operation is not terminated, it becomes incapable of giving out sound altogether. Common causes of speakers to blow out is when they get too much power or too little of it.
Fully functional speakers give clear sound. When a speaker is blown out, the resulting sound comes out muffled and gritty. It is usually observed that when a speaker is made to work with loud music it tends to blow out. Sometimes neither substandard equipment nor the fact of it being worn out, turn out to be the cause. To understand it completely, we will have to understand the basic parts of a speaker and its working.
Speakers work by transforming electric signals into acoustic ones. The basic parts malfunctioning when a speaker blows out are the electromagnet or voice coil and the cone or diaphragm. There is a wire wrapped around a conductor and a magnet that gives off a magnetic field. The coil joins with the cone. These two are held together by a cloth hindrance called spider, which makes possible their mobility together. A ring holds the cone in place, called surround. All this is covered by a cloth and finally the casing.
The coil moves, when current is applied, and in turn the cone starts vibrating. These vibrations give off sound waves. When too much electric force is applied to a speaker, one of the two things happen, breakage in the parts occurs or damage is caused due to overheating. Applying too much power will cause the coil to vibrate wildly, it will move in patterns for which it is not designed. This makes the cone move farther and sometimes it touches the cover, which muffles up the resulting sound wave. If this is continued, component breakage occurs in the system due to excessive strain.
Over heating due to electric charge can also cause a speaker to blow. This also happens due to excess of power supply. The parts get heated up and bindings holding them together melt. Sometimes the coil itself gets burnt enough to disengage.
Another reason for speakers to blow is applying less energy. Amplifiers that forward less power to the speaker produce a faulty vibration. This produces distortion in sound and the speaker incapable of handling it, blows out.
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