I'm speaking as an MBL 101e owner. I love the combo of a ballsy solid-state amp and a tube preamp. I really didn't like the way the MBL 6010D pre mated with the 9011 amps. Unbelievably dynamic but with a steely or ringing sound at the upper frequencies. Having said all that, I am currently using a Boulder 2060 amp and an Audio research Ref 3 preamp, to extremely good effect. Incredible layering, soundstaging etc. But what really knocks my socks off is the "you are there" sense of dynamics. I'm also using a Rives PARC ettenuator, which really tames the bass in my room.
David Shapiro
David Shapiro