bache, polypropylene capacitors are better than teflon capacitors; no one let me do anything, I changed the capacitors because I wanted the best sound; they're my speakers, my crossover.
Here are the ratings in capacitors, and teflon comes in down the list from mine;
https://www.gearslutz.com/board/geekslutz-forum/434325-what-best-musical-sounding-capacitors-use-rec...