Audiophiles like you often use this 47pF polystyrene cap for audio because they offer superior electrical properties like low distortion, high insulation, low leakage, and excellent temperature stability, making them ideal for sensitive audio circuits (like crossovers or tone controls) where signal purity and accuracy are critical, often outperforming ceramics or mica types. This small 47pF value targets high-frequency applications, offering precision without coloring the sound.