Wow! I never realized how difficult it would be to add tubes with a KRELL amp. I'm no engineer, and, I don't pretend to be into the "technical" side of the audio world. So I'll try to explain.
It seems that tube Preamps create DC. I've been told that DC will dammage my Krell amp, and possibly my speakers. UNLESS, I open the amp up and do something the the "jumpers on the digital board" . This puts some protection into the signal path. The Bad thing is - it also colors or degrades the audible signal coming thru the speakers. So, if I want to use my SS set up, say for SACD or DVD-V/DVD-A, I would have to open the amp up again and reverse the proceedure. This would remove the "blockage" in the signal path. :-( This of course, would have to be re-done when I want to go back to the tube setup. WHAT A PAIN!
Needless to say, this has thrown the proverbial 'wet blanket' on my tube enthusiasm. Is this problem common to ALL SS amps? Or is it just a KRELL thing?
Any thoughts would be helpful.
Thanks
Paul