I run all solid state except the main system which is tube preamp, solid state amp. I was all solid state for a while after getting rid of tubes a number of years ago. The tube gear I had then never sounded the same with any new tubes after the original tubes that came with the gear when I bought it wore out. I never liked any of the tube preamps I had tried then until the Blue Circle I now have. If not for the Blue Circle preamp, I would still be all solid state.