Anyone replace ceramic caps with film?

I have been using WIMA caps when space permits, don’t think they are "audio" grade, but very good. OR silver mica?

Circuit designer select ceramic caps for a reason, in some place on the circuit ceramic caps is the best choice.

.22 cap? There is a ton.. MPW are in MC225 they last about 1000 years. Teflons last 500 years and Russian surplus PIO will last 100 years. Take your pick. :-)

Bumble Bees. Were good, then Mac bought a crappy batch with acidic paper.. Black Beauties 100 years. Ceramics a long long time. WiMa great caps. 2% are hard to beat..

Regards

"Circuit designer select ceramic caps for a reason, in some place on the circuit ceramic caps is the best choice."

Agreed, you need to understand the application.  

As general rule of thumb, if in the signal path film is superior to ceramic, and of course there are numerous types of film caps...

Ceramic caps are distortion magnets. Replace all of them. 

They are the very 1st thing I get out of any equipment that I am looking to modiy/upgrade. 

Thanks for the responses.

I spoke to the circuit designer and he said he used them because they are cheap and last a long time. He said the Amtrans film caps I found look great.

Never assume. :)

I'll do some listening tests and hopefully the film are an improvement. Its in a feedback circuit in an opamp.

Never assume. :)

That reminded me a discussion about four and a half years ago:

levinson has odd choice for cap upgrades in one of their service bulletins

XR7 would be the first choice for this application... makes me wonder why they used PP in the first place.

@pragmasi is exactly correct!

The X7R ceramic cap’s ESR allows the cap itself to damp any ringing/resonance.

Thanks!