Its low frequency is large and elastic, its atmosphere is strong, its sound is warm and its life is moderate.

The main function of the filter capacitor is to eliminate noise and ripple and stabilize the output voltage. Used in power supply rectifier circuit to filter out AC component, reduce ripple coefficient of AC pulsation and make output DC smoother. At the same time, because the filter circuit requires the energy storage capacitor to have a large capacitance, most filter circuits use electrolytic capacitors.