Yes,it is strange that a regular reciever can run M80s without shut down issues and that Emotiva amps can run other 4 ohm speakers without shutdown issues.I hope whatever the issue is gets sorted out because they are both decent companies and do sound great together.

INTEGRA DHC9.9,EMOTIVA LPA1,AXIOM M60s,VP150,PARADIGM ADP350s and MINIs,SERVO15,PANASONIC BD30.