Polystyrene film capacitors or also called Styroflex capacitors are among the classic and very popular audio capacitors that are suitable for both high-quality devices in sound studios and for the HiFi area.

They are distinguished by, for example, sound. in a passive filter design have a softening feature especially at heights.

This soft effect is based on the very low clinging factor as well as a subtle harmonic addition at strong amplitudes in the high-tone range.