Default standard for speaker "sensitivity" measurement listings? Anechoic? In-room? Other?

@atmasphere Thanks so much. Very helpful post!

Jim Salk told me his measurements were anechoic because in room measurements are meaningless. I do not know how he does those measurements. Not sure how he would access such a facility. If he calculated in "half space" as lonemountain indicated, I would expect he would have used that phrase. Puzzling.

I totally get Jim Salk's point; it's valid to insist on a metric which can be compared to other identical metrics. The question I would raise is the "half space" measurement equivalent, technically, to the anechoic one? Otherwise, instead of the apples-to-oranges problem (of anechoic to in-room) we have an apple-to-pears problems (of anechoic to half space).

This is the problem with specs: many many ways to affect results that make them  not comparable to anyone else's measurements.   It's like saying your table is  "brown", it's not an absolute and is not translatable - there are 1,000's of different browns.  

Great point. At least with "brown" we can safely assume it's not being lit by a red or blue or green lamp. It is not-black, not-grey, and not-red -- at least.