Hi I have got a friedman runt 20 head. Calling all other Runt-owners... What surprises me is the switch ! the clean channel active shows RED light on the switch. the dirt channel active - switch-light is off. ODD for me ... it is the same at other runt or BE users??? Anyway... it is a great amp. I also checked the PT20 but I was thinking I wd prefer a 2 channel amp. Both are killer sounding amps. I run the runt 20 with a 2x12 Marshall box loaded with 2 Eminence Red Fang 12".