It seems I managed to delete the entire post on this subject inadvertently this morning. Below I have reposted the graphs of the M60, M80, EP500, and EP600.
There were some questions as to why a flat anechoic response was better than a flat room response. I was answering kcarlile on his comment that 'speakers would have to be measured anechoically to be able to work properly in the majority of rooms'.
My response was that you are on the right track here. It is important to be careful not to get your goals backwards. The measurements must be done in anechoic environment in order to bring the performance accurately to your room. It is a red herring to think that a flat in room response is the ultimate goal. The ultimate goal is to accurately place the performers in your room; not turn your room into an anechoic chamber.
M60 Graph:
M80 Graph:
EP500 Graph:
EP600 Graph:
