Well, I have both these pedals of the thread title, and I've been using them with the same ac adapter (attached image). The thing is, I just found out that, regarding polarity, the MM4 is center positive, and the Distorto is center negative. Right? They seem to work fine with my ac adapter, but what am I missing? Could I've damaged my equipment?
About the power supply: I bought an used MM4, that came with this generic power supply. It had a sticker on it which read "ac adapter for Line 6 - 9v - 1.2mA - input 110-220", but nothing about polarity.
