Hi Westcoast.
I have a similarly shaped room maybe not 40' wide but it's open into the kitchen so it surpasses 40 there and my vaulted ceiling is a good bit higher.
Not kicking the M80s one bit but have no fear that the M60s can handle that room. Mine do not even break a sweat and will play perfectly clean to levels well beyond what you can stand at any of those distances. In fact, I have another set in a much smaller, full HT with a sub setup in the basement but I prefer the sound of the M60s in that larger and more open space for music. My wife actually even states this preference now and then and normally, I'm thinking she isn't even ever listening.
For bass, I'm very happy with my M60s in full range mode but I've only heard the M80s in an outdoor environment so I can't compare directly. I just wanted to subdue any fear that the 60s may lack the power for your room.
Last edited by Murph; 04/04/11 01:01 PM. Reason: clarity
