Good day to you all, I'm very happy to find this thread. Please allow me to compare my limited experience. We had an extended comparison at the society between high class solid state amps including Bryston (4B3), Pass, Gryphon. Members agreed 4B3 more than matched the others in resolution, transparency, soundstage and realism and 4B3 had more authority and involvement. The member who organised the test was planning to purchase Pass, he opted for a set of 4B3 to drive his JBL Everest ($40K a pair). He also owns Krell and Levinson, they are gathering dust. 4B3 treble is as good as any transistor amp but bettered by good valve amps. I think the traditional reputation of lively/strong bass/mid at the expense of grainy treble was true for 4B and 4BST but no longer true for 4B3. The biggest improvement may have occurred with 4B2 when the output circuit was radically changed but I have no personal experience of the 4B2. We also found the following (no cost) ways. 1) Try to buy the dealer demo 4B3 it takes a huge amount of time to run in 2) The unbalanced (phono) input gives a much more involving sound than the balanced input. Happy listening! (Disclosure, Bryston/Thiel for past 20 years).
