The "SILMIC" series of aluminum electrolytic capacitors for acoustic applications uses an entirely new type of electrolytic paper. The primary constituent of the newly developed electrolytic paper is silk fiber. This paper was believed unfathomable as an aluminum electrolytic capacitor. The new product beats the silk fiber and mixes it with Manila hemp fiber to provide an aluminum electrolytic capacitor used for high-grade music. Therefore, the series exhibits a superior acoustic characteristics.