We often use the microphone to speak or sing because the microphone is too close to the speaker or facing the speaker, turning up the volume produces a high-frequency positive feedback whistle, and your speaker tweeter may not work. This is because most of the signals in the mid-high range are sent from the high-pitched after the crossover, and all the high-energy signals will burn the speaker through the very fine tweeter, so when you use the microphone, you must remember Slowly increase the volume from high to high, don't turn it up in one breath, so that the speaker only emits low frequencies like the sound of a cow.
1. Of course, the loudspeaker will be damaged if the power is turned on too loudly. Another situation is that the power of the amplifier is insufficient and the loudspeaker is turned on hard, and the output is abnormal cutting signal. It is recommended that users who like high volume should buy a high-power amplifier. The low-power 30W power amplifier is likely to burn out the low-impedance loudspeaker.
2. If the amplifier has a DC output, it will definitely burn the woofer, and even a very small number of tweeters will burn. The reason is that there is no capacitor on the crossover path of the woofer (or other sound path) to isolate the DC, and the DC output is like passing DC into the speaker, and even the crossover coil is burnt to black. Therefore, when purchasing an amplifier, you must pay attention to using an electric meter to measure whether there is a DC output at the output of the front stage and the rear stage.
3. If you installed it yourself, you must know about high frequency oscillation. If you are installing it yourself, you should pay more attention to high frequency oscillation. Use an oscilloscope to check whether there is oscillation or DC in the front and rear stages. output, in case you don't notice this is the case, then maybe burning your fancy speakers is enough for you to buy several 20MHz scopes.
The post-stage (or broadcast) of the vacuum tube with an output transformer will not have a DC output (if there is, it will be scary), but the vacuum tube machine is popular again, and special attention should be paid to the vacuum tube machine. It is easier to have high-frequency oscillation or interference. The above The situation is the most common cause of horns, providing you with a reference for daily maintenance.