1, the configuration is not reasonable

Power amplifier output power is too big, causes the damage of high unit, actually otherwise. In professional situations, speakers generally can withstand 3 times the rated power of large signal, instantaneous can withstand 5 times the rated power peak impact and won't have a problem. Therefore, not because of strong impact accident or receiver noise for a long time, and by the power amplifier power big and burning high unit is rarely appear.

It is well known that the speaker has multiple speakers, speaker on the power, according to the different frequency division point by the different allocation.

Amp rated power, maximum pink noise power in general professional speaker, that is to say, the speaker of the rated power refers to pink noise or broadband can withstand the analog signal power. A crossover point for a 1.6 kHz, the rated power of 100 w binary frequency speakers, when the power rating, bass unit can be assigned to the output power of 78 w, and high unit assigned to just 22 w. Therefore, pink noise on the speaker put 100 w power or ordinary program signal power, it can withstand; With 100 w single-frequency signal to test, regardless of the treble and bass unit may be damaged. Three points if a frequency of the sound box, medium and high frequency division in 4 KHZ, so high unit of power is only 5% of the nominal power. If improper power allocation, you will easily causes the damage of high unit.

Under normal circumstances, if the input to the speaker signal increases 1 times that of the high head power only by 5 w; But if the power shortage of power amplifier, signal overload appear cut, high order harmonic component will increase. Was formerly a sinusoidal signal of 1 KHZ, when overload cut close to the square wave picture, outside on the sine wave of 1 KHZ will produce a large number of odd harmonics, such as 3 KHZ, 5 KHZ sine wave energy, high frequency components in the signal ratio increase greatly, causing the signal of high frequency spectrum energy is much more than high power unit can afford. Even if the signal didn't achieve the amp rating total power, but high unit has overload and damage. This kind of situation than short-term overload signal, but not a cut of more dangerous. In the signal distortion, short-time overload 1 KHZ signal, power energy on power larger bass unit, not more than a speaker of short-term maximum power, general won't cause speakers the deviation of power distribution and damage the speaker. Therefore, under the condition of normal use, the rated output power of the power amplifier should be speaker 2 to 3 times the rated power, to ensure that power amplifier in the speaker's maximum power without distortion.

2, improper use frequency divider

The input frequency division point improper use, or speakers work frequency range is not reasonable is also a cause of the high cell damage. When using frequency divider, operating frequency range shall be provided in accordance with the manufacturer of the speaker to the choice of reasonable crossover point. The tweeters crossover point on the low side, if you choose to bear power burden is overweight, it is easy to burn high unit, alto the trumpet.

The input frequency division point improper use, or speakers work frequency range is not reasonable is also a cause of the high cell damage. When using frequency divider, operating frequency range shall be provided in accordance with the manufacturer of the speaker to the choice of reasonable crossover point. The tweeters crossover point on the low side, if you choose to bear power burden is overweight, it is easy to burn high unit, alto the trumpet.

3, improper equalizer debugging

The adjustment of the equalizer is also very important. Frequency equalizer is designed to compensate the indoor acoustic field of all kinds of defects and the speaker of the frequency set up by the uneven, should use the actual spectrum analyzer or use other equipment debugging. After debugging the transmission frequency characteristics should be within a certain range of is relatively flat. Many do not have sound knowledge of soundman optional debugging, there are quite a few people, even the too high frequency and low frequency part of the equalizer, form a "V" glyph. If the frequency compared to the mediant frequency was promoted above 10 db (equalizer adjust quantity generally in 12 db), not only the equalizer caused serious dyeing phase distortion to the music, and at the same time, also easy to cause sound coloration, burned, the main cause of this kind of situation is also burned the speaker. And, of course, the sound system design according to the actual situation, such as the size, purpose, build sound site condition such as comprehensive consideration, according to the actual conditions of use to determine the maximum sound pressure level in a row, then to determine the maximum SPL ＆#118alue of speakers.

4, the regulation of the volume

Many users put level after attenuator of the power amplifier in 6 db, - 10 db, namely the volume knob of 70%, 80%, and even the general position, by increasing the volume of the mixer input to achieve appropriate, thought power amplifier have allowance, sound box is safe, in fact this is wrong. Knob decay of the power amplifier is the input signal, if the power amplifier's input attenuation 6 db, which means that, to keep the same volume, mixer or former level output must be more than 6 db, voltage is higher than 1 times, input of the dynamic margin, commonly known as "head space", will be cut in half. At this moment, if there is a sudden large signal, will be as early as 6 db mixer output overload, a cut of waveform. Although no overload, power amplifier is cut of input waveform, high weight is overweight, not only high distortion, high unit are also likely to burn out.

The above analysis, we can make us very clear in your mind: speaker burn coloration, an important reason, is the power amplifier's power is too small, not too big. Send out sound signal of the power amplifier is cut signal, causing damage to the speakers. So, when configured audio, must establish the correct understanding, with a "big mara car", prevent damage of power amplifier send cut signal and high, alto speaker unit. When making a sound system design, the design of the power amplifiers and acoustics cases matching the above principle, the practice each link of equipment to reasonable use, can both protect the equipment, and make a sound system to achieve the best effect.