Hmmm... I'm not sure about the MPS-1, but the problems concerning the XPA-2 almost make sense according to Emotiva's explanation, that the M80's actually dip down to 2 ohms when pushed really hard. And am I wrong that the protection system is 2 fold... A. it's there to protect the amp from over working, and B. it's there to protect the speakers? So in the event discribed, it detected a huge pull from the source, and didn't want to send all that power to the speakers and damage them? Of course the XPA-2 couldn't know that the speakers hooked up were Axiom M80's and could handle all that power and then some, all it would know was that it was more power than it was 'supposed' to send to the speaker.

I could be wrong, but that's how I've always understood protection systems like those to run anyhow.

My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD