My family/great room is about 11x20' with a cathedral ceiling (12' high on one end, 8' high on the other). It is open to the dining room on the right side on the one end of the room that has the tv, avr, fronts and center. Moving away from that, the room opens up to the kitchen eating area of roughly 11x12' size, with a continuation of the cathedral ceiling. We sit in the family room to watch tv and movies. I see lots of references to large, medium and small rooms but I get the sense that these are enclosed spaces. How does this space design that I and a lot of other people have, judging by all the open-concept renovations going on, affect room sizing and ultimately speaker purchases and placement? Thanks.