Mark IVb (early transitional model, has some elements of the A revision) with a Mesa standard cab. Used to own a Mark III red stripe and a Mesa .50 caliber+
I think I have mine set at 3 or 4 and run the 6600 slider a little higher. I'd have to check when I get home from work to be sure though.Same as mine grimmchaos, just out of curiosity...how do you usually set the presence knob? I set mine quite high with the 6600 slider not that high.