Sorry Jerry...didn't mean to open an old wound. As I said in the previous post, "others may disagree" and I bold italicized the generally accepted knowing it might be somewhat controversial. To your point earlier about Audyssey averaging different locations, I think the argument is somewhat strengthened for not using an MLP that truly could never actually be a real seating location (symmetry be d*mned)! An exaggerated viewpoint of this would be if you're seating location was entirely off-axis (I know, non-AVS'ers shudder at the thought but those into higher powers like Feng Shui...) then would you still put the mic at the symmetrical width location of your room for the first measurement? And what about the equilateral triangle that true stereo aficionados swear by? Does that mean you should set your mic several feet in front of or behind your actual MLP? Again, I don't mean to start a debate or rehash old issues. I've often wondered about the delay settings being fixed on the first measurement location and what positive/negative effects this has on other listening locations?
EDIT: One small distinction I wanted to make with respect to the location of the MLP. I've read plenty where people like Keith place the mic at their preferred listening location for their calibration but I haven't seen a lot of people referencing theoretical points in space where no one could actually listen as their MLP (I supposed a tiered seating arrangement like the OP has is a perfect example). I think similar to you, my MLP is a sofa where the center of the room or a point equidistant from L and R does fall within the primary seating location. In this case, I measure similar to what you describe even though in reality, I rarely sit dead center on the couch (it's a two-cushion model and I hate being in the crack!). The difference, subtle as it may be, is that the 1st measurement location "could" physically be a listening location albeit rarely ever used. Probably a small distinction but a distinction nonetheless.
Edited by jkasanic - 9/25/13 at 9:34am