I spent an interesting afternoon in Mark Levinson's NYC store many years ago. I was there with an audio-reviewer friend who knew Mark. The most interesting part of the visit was when Mark left us in his studio for an hour with instructions to play with any of the equipment we so desired ! The special piece in the room that day was his new Nagra reel-to-reel digital recorder ! He had the ability to insult you to your face and yet you went away not being offended ! An interesting guy !
I have several of his recordings both on vinyl and on CD and find them unremarkable both sonically [too dry] and musically. My reviewer friend owned quite a few pieces of Mark's equipment, most of which I thought sounded on the "sterile" side, but the build was excellent ! I think that Dan D'Agostino stole Mark's "Crown" when he started the Krell company. Interesting times ! What a great hobby !