As we all know, in the conference room acoustic planning, demand according to a series of accounting to confirm the speaker power, and then confirm the power amplifier power by the speaker power, but ultimately how to choose the power to reach the best match? First of all, within 20Hz~20kHz of the human ear listening domain, music signals that actually gather a lot of energy are generally in the middle, low and low frequency bands, while the energy of the high frequency band is only equivalent to 1/10 of the energy of the middle and low frequency bands.

So, the power that general sound box treble loses is lower than low horn much, in order to high and low sound balance; Modulator and the power amplifier, such as a current, its input audio signal under the control of the output range of different current to the speaker, makes the attack range of different sound, under the condition of impedance must be, if you want to let the nominal power of 200 w power amplifier output reached 400 w or a few times are actually very simple, just distortion (THD) of the power amplifier will add greatly.

This kind of distortion is produced primarily in the high frequency harmonic in the signal of medium, low frequency, its distortion is larger, energy of high frequency harmonic is larger, and these high frequency distortion signal will enter treble head together with high frequency music signal, this is why small power amplifier pushes big sound box to be able to fit burn treble head reason. And in the concept of many people, want result to put power only big, have perhaps burn sound box.