Quote:

What I do know is that with both units set at 75db with an SPL meter (Yammi & Emotiva) there is a difference, maybe not in volume, but in the other aspects of SQ.



That's very interesting and I have no doubt that you hear a difference. Can you please tell me how big the room is (cubic feet) and how far away from the M80s you took the measurement? That will give me a good idea of how much power you are drawing from the equipment. Thanks.