【 Weak current College 】 video conference speaker burnt four main causes and solutions

1, speakers and amplifier configurations are not reasonable
Inexperienced tuner that power amplifier output power is too large to cause damage to the treble unit not necessarily. In professional contexts, the speakers can be generally afford three times the rated power of instantaneous impact large signal, can withstand 5 times the rated power of peak impact without a problem. Thus, not because of unexpected strong shocks or microphone long howl, but by the power amplifier power while burning treble unit is extremely rare.
We all know, the speaker has multiple speakers, speaker on the power, press the crossover point different for different assignments.
Speaker of rated power, General professional speakers marked the largest pink noise power, that is, the speaker of the rated power is the pink noise or broadband can withstand the analog signal power. A crossover point for 1.6kHz, rated as the second frequency speaker 100W, at rated power, bass unit can be assigned to the output power of 78W, treble unit is only assigned to 22W. Therefore, on the speaker's pink noise imposed 100W power or ordinary signal power, it can bear; and the use of single-frequency signals to 100W test, whether the treble and bass unit may be damaged.
2. improper use of divider
Input frequency point used improperly, or speakers operating frequency range is also not reasonable treble unit damaged. When using dividers, you should strictly follow the manufacturer's speakers working frequency range to reasonable choice crossover point. Treble speaker frequency points if you select low, to bear an excessive burden on power, you can easily burn the treble unit, baritone Horn.
3 Equalizer debugging improper
Equalizer to adjust is also critical. Frequency Equalizer is to compensate for the various sound field flaw and speaker of the frequency is not uniform and settings, you should use actual Spectrum Analyzer or other instrument used for debugging. Debugging is the transmission frequency characteristics should be within a certain range is relatively flat. Many do not have a sound knowledge of debugging yinyuan casual, even a lot of people, the equalizer for high-frequency and low frequency part references too high, forming a "V" style. If the frequency and in audio rate higher than 10dB compared to be promoted (equalizer adjustment is generally 12dB), not only caused by phase Equalizer distortion to the music of severe staining, at the same time, it is easy to result sound treble unit destroyed, such situation is the main reason for the burning of the speakers. Of course, the sound system is designed according to the actual situation, such as venue size, uses, such as acoustical conditions, according to the actual use conditions to determine the maximum continuous sound pressure level, which in turn determine the speaker's maximum SPL values.
4. volume adjustment
Many users put after the class amplifier attenuator placed at-6dB,-10dB, i.e. 70% of the volume knob — 80%, or even general position, and increase the mixer input to achieve the appropriate volume, power amplifier, speaker left margin of safety, in fact this is wrong. Power amplifier decay knob attenuation is the input signal, the power amplifier input attenuation 6dB, which means that in order to maintain the same volume, mixer or fore more output high voltage to 6dB, 1 x, type of dynamic balance, commonly known as "head-space", will be cut in half. At this point, if there is a sudden large signal, will the early 6dB sound mixer output overload, cut piece of waveform. While the amplifier is not overloaded, but input is cut piece of waveform, treble-component, high overload distortion, treble unit can also be burned.