The 850's debuted at RMAF. These blocks were - literally - brand new, not broken in. They were mated to the new Accuphase DP57 and were driving a new model of the mid-line JM Focals. Very, very good sound. I also listened to the 2060 which was driving JM Focals as well. Certainly, at $10k retail the 'entry-level' Boulders are worth a listen, which I intend to do as soon as I can borrow a pair for audition.
Boulder monoblocks
I am very interested in the Boulder monoblocks which look very impressive and have very impressive specifications. However, there are only a few serious reviews published on these amps and for $55,000 there are many options. Essentially, for me the most important quality of an amplifier is its bass performance, I like bass that is ultra fast, tight, controlled, and with lots of slam. Another amplifier I am considering are the giant Mark Levinson No. 33 Reference monoblocks. I heard them at a local showroom and thoght that it sounded amazing. I am wondering how it compares to the Boulder monoblocks. Anyone who has had experience with the Boulder monoblocks I would appreciate your comments. Thanks.