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# Relationship between Capacitor and Sound(II)

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Precise frequency division points and capacitors

As previously mentioned, the LC network composed of capacitors and inductors is a frequency division circuit, the formula of which is:

F (frequency division) = 2 π (L x C)Therefore, the frequency division frequency of the classification points should be accurate, and the capacitance value of the capacitor should be relatively accurate. Therefore, the errors of the capacitors used on the frequency division lines are more accurate, such as ±20% ±10% ±5% and even ±2% ±1%.

Signal SIGNAL) and the polarity of capacitors POLARITYY:

Because the power amplifier outputs a signal voltage (also known as an alternating current), the capacitor used on the frequency division line must be a "nonpolar" NON-POLARIZEDD.

Signal SIGNAL) and capacitor voltage-proof WV:

In order to carry the output signal voltage of the power amplifier, the voltage value of the capacitor used on the frequency division line must be higher than the value of the output signal voltage PP / PEAK-PEAK designed by the power amplifier, Generally, 30% to 40% higher than the safety value (also do not need to require too high voltage value to avoid unnecessary cost). Most of the power amplifier output signal voltage is not more than 30 VACs, so with the voltage value of 50 V can, of course, the voltage value of 100 V is more safe.

The size of the load power power has no effect on the voltage value of the capacitor, but it has something to do with the carrier ripple current of the capacitor, RIPPLE current), that is, the loss angle value of the capacitors.