Brad--probably off-topic, but I've been meaning to listen to 40A and 50ASLT for a long time. I bet that within domestic reason, they sound similar (and great) from one room to another (as well as similar to each other except for bass and SPL). Without asking you to shill your product, can you comment?
Does measurements really matter?
This video by Thomas interview Harley is one the best way to understanding the topic of measurement