Can't give you an answer for your first question, but Tireguy was right on about MUG. As far as an amp recommendation, I'd recommend an Innersound esl amp. I'm using the Innersound esl amp with Magnepan 1.6. and the sound is effortless. The amp is designed with high voltage and power to drive low impedence speakers such as Magnepans. I was able to do a in home trial of the amp from a dealer and never sent it back because its one killer of an amp!
