The first way how the power amplifier burns out the speaker is: driving the speaker overloaded for a long time, the speaker will burn out due to overheating, because the temperature of the coil increases, causing some structural parts to If it melts, breaks or burns, the temperature of the coil will reach 180 degrees Celsius under normal use. You can imagine the temperature under abnormal use! The second type: mechanical failure. The overloaded drive horn causes the paper plate to move beyond the range and separate from the coil, or the coil and coil seat separate. The paper plate folds or the speaker support ring is torn. Once any of the above situations occurs. , can cause speaker failure. When the hems or support loops are torn, the coils will rub against them because the tray assembly is no longer properly suspended in the center. Small tears may not be felt at first, but over time, when the cracks become larger When the time comes, the speaker will break. The third type: The fault of the speaker may also be a combination of the above two methods. For example, the power amplifier suddenly outputs a large instantaneous energy. This energy can be the sound suddenly louder, and the speaker will have a strong vibration, causing the coil to break away. Due to the magnetic gap, when it goes back, it may be eccentric and unable to return to its original position. This will cause the entire mechanical movement to be carried forward by the paper plate, deviating from the original position. As a result, the paper plate can no longer make sound, but the energy continues. On the coil of the transmitted speaker, the coils leave the magnetic gap, because the magnetic gap is the best heat dissipation environment for the coil. However, if the coil has left the magnetic gap, then when the coil continues to receive signals from the power amplifier, the coil will quickly heat up, causing Burnt coil. A good speaker must maintain normal operation within the rated power and frequency range set by the factory. The maximum mechanical displacement of a speaker that can withstand high power can generally go to one-half inch (distortion is ignored). If the distance of distortion is considered There should be only one-eighth to one-third of an inch (depending on design). …
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