In my experience, replacing the parts in the power supply section with better parts quality yields a sonic improvement.
@bigkidz , I can believe that. You were saying that it is okay to go up in value; the manual says that the power caps in this amp are 400v and 560 microfarads. If Parts Connexion does not have electrolytic caps with screw in terminals of those specs, you are saying it is okay to go up to the next size on both values?
Thanks/Matt