You need a tip to ground switcher to access all of them. The footswitch allows you to toggle between two. Wait, you you can also mix the two together. Discrete controls per channel with mixing controls also. Clean sounds are pristine yet fat.
Dirty sounds have plenty of juice for sustaining notes.
Use a gate for super high gain settings. The range on the gain control is vast, with lots of character in the mid way settings. The rating comes from my previous experience with other Mesa gear. Wouldn't think of getting rid of it. Provides my clean and brutal rhythm sounds live.