What a load of crap from Emotiva.
"They don't pair well with M80's."
Whiskey Tango Foxtrot. Sounds to me like they're just lying about the specs of their amps. Pure and simple. If the specs state it's 4-ohm capable, it better reliably power 4-ohm speakers, period.
It still blows my mind that my lowly $499 LPA-1 has no trouble at all with my M80's, when all of their 'high-end' amps can't do the job.
I'm just one insignificant customer, but I'm now seriously rethinking my preorder of the UMC.