@ KngHiFi, Hi, Thanks, this is good to hear some success of useing tube preamps with some of the krell amps, I did have a bad exsperience once useing a tube source direct to amp, the source, as it turned out was emitting DC into the amp, thus throwing the amp into stand-by mode, I tested the source with a volt meter, yes, there the Dc was!, I am just tring to be careful here to not damage the amp in any kind of way, I also wanted you to know, I am a big fan of useing solid state amps with tube sources or preamps, I enjoy the tube magic, brings some musicality to my ears, instead of a two dimensional over resolving sound that I find strange that alot of people like, I do understand we all have our own preferances.