My BIG Mesas (Lone Star Classic & Special, Electra Dyne) and my TA-15 clean up very, very well even with tons of gain dialed up. This is one of the reasons I love playing them so much. Each of those have OD channels that I could sit on all night without touching a pedal. However, I will say my Mini Rec does not share this attribute. It cleans up, but gets a bit muddy and not really usable in the same way, at least for the music I play. Still love it though. And isn't that sort of what channel switchers are for?