most people have had problems with the xpa2 m80 combo this is no secret.. I have played my xpa5 in all channel stereo and just stereo(m80's)full range at loud levels for hours with no shutdown's ever.
I am not saying this to start a shit storm I am just giving observations.
the m80's seem to be the speaker with the most problems when being driven by emo amps. there are many 4 ohm speakers that have no problems with emo amps.. including emotiva's own 4 ohm speakers.
I know test's were done with sirquacks mps1 being crossed over above 80hz(way above 4 ohms I believe) and the amp still shut down which is crazy. But to this day I have never seen any info on what the m80's impedance is 40hz down to 10hz
