Okay I'm curious about a 12au7 too, will wait for @Sushi Box FX to opine before spending mad money.1ST: THANKS FOR THAT!!!
It sounds as though off the shelf it's a lot dirtier than I usually enjoy...which makes the hamster in my head ask whether switching 1 of the tubes to a lower gain option (12au7?)
would preserve the character but allow for more clean runway?? Sushi Box FX


, maybe and old Mullard or RCA from my tests with a tube mic pre, from back when tubes were cheap.