[rookiest]

there's some room for firm capacitor In tangent's PPA1.1 Board called C2,C3,C5.

http://www.tangentsoft.net/audio/ppa...-1.1-hires.png

Now, I use them with Cheap BC's box type capacitor which seems very humble.

I want to replace them with more expensive film capacitor Like RTX Multicap , Hovland Musicap, Moondorf Supreme, etc.

It'll cost a lot more than now, but...

Can there be some remarkable changes of sound quallity or something?

 

[steinchen]

no, there won't be a change in sound quality since the caps are for bypassing the power rails and have nothing to do with the signal path. An "upgrade" would be a waste of money.

Mundorf caps etc are for use in the signal path like C1 on PIMETA.

 

[xtreme4099]

if you have a triad diamond buffer, there are great benefits from adding film caps for the bypass caps, like say polystyrenes, 0.10uf value. partsconnexion.com i believe sells them, relcaps.