Capacitor life

[Superdad]

32 minutes ago, Blake said:

I have an Aesthetix Calypso preamp that is about 10 years old.  It has Rel-Cap polypropylene coupling capacitors.

 

The unit is with Aesthetix right now for a very minor service issue.  

 

Does anyone have thoughts on replacing the caps while it is in for service?

 

Hi Blake:

Those film caps will last another 15-20 years easily. The ends are well sealed from the air and the materials are quite stable. And based on changes in German films over the past 12 years, I’d say that the caps in your preamp are possibly better sounding than ones Rel is currently producing. So leave ‘em.

But get yourself some fresh tubes!