What is a polypropylene capacitor and why are they better?
A polypropylene capacitor is used to filter frequencies in the crossover network and control the way the speaker sounds. Polypropylene capacitors offer a much cleaner and sweeter sound than an electrolytic capacitor but cost considerably more money. The picture above shows an electrolytic capacitor on the left and two different grades of polypropylene on the right. These capacitors are all the same value in micro farads and show the difference in size. This is an example where size does make a difference.
