Thank you for your review Josh. I walked through each of your test tracks listening to my 4B3 with Magnepan 1.7 and found I was in complete agreement with every comment you made about the Bryston. When I started on the "Oh Mercy" album I found I had to listen all they way through. Space and separation in "Man in the Long Black Coat" is sublime. The soundstage and control of the 4B3 has made this an end game amplifier for me.