Rock Chalk
Fractal Fanatic
They were set somewhat similarly........for one thing, the Plate Suppr Diodes were turned on for all of them, as well as the Speaker Drive turned down to 1.0. The basic tone knobs were tweaked to taste.Definitely can tell a difference in those i amps, and I am listening thru a phone. That's impressive, the herb, 5153 and Uber Definitely sounding authentic and awesome..my favorite maybe the BEc45. Maybe I didn't read enough , I take it the eqs and gain of the amps were set similarly