If you read the article you must make of it what you will. The choice of capacitors depends on several things. PIOs sound the best to you. But, for example, suppose you have an amplifier with an OPT that isn't the best at high frequencies and you would like more. Choosing a low DA cap may improve the HF response. I also like PIO caps in audio. For decades that's all there was. And the old electronics worked well with them. But here's a quick story. Years ago after I read the article I replaced them in my Ampex 351 tape machine electronics with polypropylene and some polystyrene types. It peaked the HFs too much and I needed to remove them. But in most tube amps with OPTs they sound just fine. To argue which is less or more linear is BS. I seriously doubt that the vast majority of people here have the equipment, know how or ability to truly measure that. And remember, personal opinions are like butt holes. Everybody has one and they all stink.

What are the use of metalized polyester film?

.12.08 Industry News