ATMA-SPHERE MA-1 MK11.3 with magnepans, am I completely mad?!

Well, Ralph is on the forum, so either PM him or wait to see if he'll respond.

Of course, you can always call the shop directly. He usually answers the phone.

I agree with @soix, his amps are known to work well with low impedance speakers.

Bob

I've done a bit more reading and I think the match can work, so I've told the dealer that I want to buy the amps.

I can always return them if the match isn't working but I think it might be a stunning combination.

The numerous positive reviews of the ma-1 convinced me!

I think you're on to a winner. The amp' s those put out will be more important than watts.

I thought the issue was impedance. 

The Maggies dip pretty low and the Atma amps like to see higher. I did hear a rig that used Z Transformers (the anti-cables guy) between Atma-Sphere and Maggies and it sounded great.

Best talk to Ralph.

If you have a woofer amp, and the mids and highs are handled by the MA-1 I think you have a shot at it. You might want to also try the ZEROs with the amps (www.zeroimpedance.com); do both ways and see what you prefer.