Originally Posted by miky
What capacitors would you recommend as a replacement for Solen 30uf (36x53mm)?
30uF is a large value - what's the application?
For values of 2.2uF or less I had good results with Hovland, but I'm sure other foil caps (i.e. non-metalized!) are decent too.
For a large value like this you might have to compromise due to space considerations. KimberKap have decent metalized caps that sound to me much better than Solen. Auricap is another option, but the price is much higher last time I checked. I also heard good comments about Clarity caps and i'll have a chance to audition these next week in a newly done crossover for big Usher speakers. Preliminary "report" is good.
Bypass the metalized cap with a small film cap around 10% the value. In your case, a 2.2uF is close enough. You can try it with the Solen or just order the better caps and do the job right.
When selecting caps, determine the actual operating voltage and pick a cap with a slightly higher voltage rating. Don't go with much higher voltage than needed, because that usually means thicker dielectric, which is bad for audio applications.