[maurod]

edited

[BrunoB]

Here is a capacitor comparison study: http://home.zonnet.nl/geenius/Cap.html

[jeffreybehr]

Here http://www.altavistaaudio.com/caps.html are some rational comments on capacitor sound quality.

[_scotty_]

The feedback I get from people with ears I trust suggest that the Mundorf
Supreme silver and oil are among the very best at any price. They are on my short list for building xovers or cap coupling applications.
     Scotty

[maggy]

maurod,

I noticed your listed choices were in the 600v up range ...  Isn't that too much.   For speakers,  I would suggest somewhere between 50v to,  say 100v.

Try either Jensen copper foil or Black Gates N or NH types.

[_scotty_]

As a rule the higher voltage rating the film cap has the better it sounds. Interstage coupling caps and xover caps are subject to this criteria. This seems to be particularly applicable to metallized film caps.
Scotty