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Thanks very much

for providing a reference to that article. I read it quickly just now, but I will save it for future reference. You are correct in citing the fact that the author rather likes C0G ceramics for use in audio, but he ends with the following statement:
"For small, low distortion capacitors up to 10 nF [nanofarads], my personal choices would be C0G ceramic" For higher values typically used in audio circuits, he would go with polystyrene film and foil or polypropylene film and foil, as stated in the sentences following the one I quoted. For use in audio, the C0G would be limited by the fact that they are not made in values higher than 0.1uF (100nF). If you've designed your RIAA such that you only need capacitance up to 0.1uF, you're good to go. Not many commercial RIAA correction circuits use capacitors that low in value. Note also (Tweaker) that his data do not support use of ceramics, other than C0G types, in audio.

I was very interested to see that he likes polystyrenes, because I like them a lot too, based only on my subjective observation, for values up to 2.0uF. As he mentions, the sad fact is that PS capacitors are disappearing in favor of polypropylene.

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