Richard, since there's no particular difficulty in measuring those by anyone with the equipment and knowledge, I'd hope that your outlook is too pessimistic.
I don't understand what your saying john?? How is it pessimistic?? Brent said it was proprietary information. This seemed odd since there is information all over the WWW for a lot of different speakers. All I was saying is if they wont give that info via email they certainly aren't likely to give it on the forum.
PS - I have a rig I made myself using REW and I also own a tester I bought from Parts Express, since I had axiom drivers I was hoping to compare my finding versus the manufacturer's specs. I even offered to send him my specs and he could say they were close or they weren't close, he did not even respond to that email.