My MPS-1 worked as well for many days until all of a sudden, lights out, during certain movie explosions and cranking the Denon to 0 (reference) or beyond. It is a little comfort though.

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