An important reason why speakers burn high pitches is that the power of the power amplifier is too small, not too large. The signal sent by the power amplifier is the amplitude-cutting signal, resulting in damage to the sound box. So, WHEN EQUIPS SOUND BOX, MUST ESTABLISH CORRECT TO KNOW, WANT TO USE "BIG PULL A CAR" PLAN, AVOID POWER AMPLIFIER SENDS A SIGNAL THAT CUT AMPLITUDE AND DAMAGE UNIT OF LOUDSPEAKER OF TALL, MEDIUM TONE.

When undertaking the program of sound box system, the criterion of above mentioned important case of program power of power of work put and sound box undertakes match, the equipment of each link in actual operation wants to use reasonable, ability achieves already protect good equipment, can make sound box system reaches optimal action again. Of volume recuperation, the attenuator that many users put after class power is placed in -6DB, -10dB, namely 70 percent of volume knob -80 percent, even general azimuth, rely on increase mixing station input to reach appropriate volume.

Think the power amplifier has a margin, the sound box is safe, actually this is also a fault. The attenuating knob of power amplifier attenuates is input signal, if the input of power amplifier attenuates 6dB, also means, want to insist equal volume, mixing desk or before class is necessary to output more 6dB, voltage should be high 1 times, the dynamic margin of input, commonly known as "overhead space ", is about to be cut off by half.

At this time, if there is a burst of large signal, it will be 6dB earlier to overload the output of the mixer, showing the amplitude cutting waveform. Although the power amplifier is not overloaded, but the input is the amplitude of the waveform, treble weight is too heavy, not only treble distortion, treble unit also may burn out.