All the FAS amps are amazing.
Interesting idea. I wonder if the FAS amps have a response that is even possible from an analog circuit ? To my ear, the FAS amps sound more perfect than the amps they're derived from. Like warts and limitations from the real amps have been removed. Whether that makes them better--or lacking character--is a matter of taste, I think...I've often wondered if a tube amp manufacturer could learn a lesson or two by examining the design of the FAS amps.