A few years ago I had the king of the hill MPS-1s, also worked with Lonnie over a period of 3 months, replacing the mono's, etc. The amp kept going into protect mode prematurely, far before the Denon 2805 (at the time) would even break a sweat. Can't comment on if they have resolved these issues, however, they said it was the fault of the m80's dropping to 1ohm, not.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85