I have a buddy that had the M120's(upgraded to the 150's) and Vandy 2Sigs and he never had any issues other than his room. He treated the room to tame too much bass. The Vandy's are 86dB @ 7 nomial ohms. Middle of the road load. I would call Rogue and question them about the issue.
Good Luck,
Burton
Good Luck,
Burton