1. The power of the power amplifier is not hard enough. When the loud power amplifier is close to the power saturation point, all the output signals are abnormal cutting signals, which will damage the speaker. A few days ago, some netizens asked that when using the RX-V320 power amplifier to watch the U571, the power amplifier that the mines explode under water will automatically shut down. This is the power amplifier is overloaded. If the RX-V320 does not have a perfect protection circuit, the speaker may be damaged Imagine how it is possible for a transformer of about 300 va to provide 60 to 70 watts of continuous undistorted power to a 5-way amplifier at the same time. Even if the power amplifier efficiency is 99.9%, it violates the law of conservation of energy. In addition, some friends who are willing to invest in a large floor box and not a high-power amplifier should also be careful, because the frequency impedance characteristics of the large three-way floor box are more complicated, and maybe the response of the protection circuit will be slower one day ... ... It is recommended that users who prefer large volumes choose high-power amplifiers.
2. The power amplifier has a DC output. After seeing the above, some friends will ask: Imported high-power amplifiers are too expensive. Can they be replaced with domestic high-quality products? The answer is completely ok, but the previous question is that it must be a fine product in the actual sense. Those so-called boutiques with huge body, gleaming silver, and several karaoke jacks on the panel, but priced at around a thousand yuan, advise you not to take this risk. Someone tried to use an 8-tube parallel high-end product called pure class A pure DC to try to force the legendary LS3 / 5a extremely low frequency. As a result, a box was struck. After unpacking and inspection, the woofer coil was connected to the crossover. The coil burned black. The DC output of the power amplifier is equivalent to using your woofer coil and the crossover coil as an electric furnace. The middle and high tweeters have better DC isolation due to the capacitance of the crossover path. The situation is better; the circuit design is improper and the component quality is unstable. The main cause of DC.
3. Karaoke When singing with a microphone, the microphone will be too close to the speaker or facing the speaker. When the volume is turned up, a high-frequency positive feedback feedback will be generated. Will burn the tweeter, because the better the high-frequency response, the lighter the quality of the diaphragm and the coil. The tweeter with a very thin coil cannot withstand your lion ’s roar, and the microphone is accidentally dropped on the ground. High dynamics are also deadly, and even magnetic fluid protection will not help.
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