I found a tube hybrid preamp that I love - the black Ice F360. Im having to send it back to the office because one of the opamps needs to be replaced. I happened to bring up possible upgrades, since I may as well consider them while Im going through the hassle of sending it back.
So here is my question for the gallery: I understand there are caveats, variables, personal preferences, etc, etc. But in general, if you could pick among four options in order to generally improve the sonics of the unit, which ONE option would you choose? 1) caps, 2) wire, 3) opamps, or 4) resistors?