i have a Saturn reverb that loves every pedal I have. I also have an ac15 that is the pickiest amp I ever come across. That said, it's still my favorite amp I have ever owned, but one thing I have not been able to make compatible is a fuzzbox. I have tried several Muff variations, with best results from a Vick Audio '73 Ram's Head, but kinda not awesome. I have tried the Fulltone '70 and it was underwhelming. Kinda looking to JHS Firefly right now but am completely open to suggestions or at least explanations why my ac15 doesn't want to see a fuzzed up signal.