If I were you I'd contact Krell directly and get their opinion. They'll probably say don't do it, but be persistent and they'll give you some pointers/suggestions. I actually question whether the work is worth the potential sound quality improvement, but it you like soldering, who am I to say anything.
Internal Amp Wire: Can it be improved?
I just picked up a pair of Krell KMA 100's which are of a late 80's early 90's vintage. Being a tube fan, im quite impressed of the Krells on certain types of music. My question is, that the amp is wired internally with Monster wire. Has anyone ever rewired the internals of the amp, or have an opinion on if I would see an improvement if I did the Krells. (any suggestions on type or Brand of wiring would be appreciated) thx