According to the manual, "The 'ON (AUTH)' and 'ON (IDEAL)' settings differ only in volume." but I've noticed that there's a significant change in tone between the two. I'm using the Brit 800 Mod and the "ON (IDEAL)" seemingly has a mid boost and the "ON" setting seemingly scoops the mids. Even when I equalize the level between the ON and ON (Ideal) settings they still sound different. This happens on other amp as well. Anyone else experience this? Thoughts?