I've waxed poetic on this topic literally dozens of times (although most of it was over at TOP). Given an
identical playback system, some (but not all) of our HX amp models can be remotely switched between it and the real amp and session players cannot reliably tell if a switch has taken place, much less when the switches took place. So what number do you give "golden ears straight up can't tell the difference"?
Eagle: But I'd be able to tell when they switched.
DI: They all thought that.
However, this result is not 100% consistent with all HX amps, particularly with regard to responsiveness and feel under the fingers. Agoura attempts to fill those gaps as well as tackle
perceived inadequacies that are peripheral to measurable, empirical accuracy. Plus some other stuff we haven't really discussed at all.