Follow up questions regarding my NAD C375BEE

I recently placed a posting regarding the protection circuit activating on my NAD C375BEE running Totem Model One Signature speakers. A poster on another forum indicated that the NAD is not robust enough to operate at the impedance load presented by the Totems and that I have damaged the amplifier. Prior to my purchase I did some internet research and found many folks running Totem speakers (including the Mani 2!) using NAD amplification without this issue. Any information or guidance regarding this dilemma would be greatly appreciated. If any readers noticed my first posting I failed to include my REL Strata II subwoofer in my roster of equipment. The REL developed a hum when I introduced the NAD into my system. Coincidence or related to my problem?
Thank you, Joseph