I've not seen the schematic, but from bits and pieces I've read here and there (?????) I'm reasonably certain that it is mostly IC-based channels with really nice vacuum tube summing. I remember reading about the use of OPA604/2604 for buffering and such and INA103's for mic inputs on the mic input version. That could be wrong, but I know I've read that in more than one place.
Check through some of the reviews on it, as I believe one of them, maybe more, mentions this.
The reviews I've read have been pretty favorable. Never heard one myself.
So, do you regularly hunt for the schematic of a device before you pay money to buy one? :wink:
:green:
JC