I would stay with the krell. My second move would be to use a mark lev. pre amp say a 38s. This will proberly get you where you want to go. You will not have to be concerned with DC feedback. My choice for tube would be ARC. I ran a ls22 with the Krell 100s and it was great. I now have Krell FPB300 with Ml 38s. Love it.
Krell does recommend a minor adjustment on their amps now if you are going to use tubes. Arc is designed to avoid DC feed back. Other high end units sould be as well.
Good luck
Krell does recommend a minor adjustment on their amps now if you are going to use tubes. Arc is designed to avoid DC feed back. Other high end units sould be as well.
Good luck