From a real actual competing speaker designer!

"Peter, I think that Donald North has nuked my theory. As far as I can tell the theoretical maximum gain from corner placement is indeed 18 dB because the energy reflected off the floor and walls (or directed by the floor and walls) is in-phase with the rear-firing port's output.
Simply put, I was wrong.

I apologize for saying that your speakers cannot do what you claim they can even with corner loading. I gave you a hard time about it and you took it like a gentleman.

I guess that different people are convinced by different kinds of evidence, and as long as I had the mistaken conviction that 9 dB was the theoretical maximum gain from corner placement I wasn't going to believe your claimed in-room measurements bass extension. Now I have no solid basis for disputing your claim of -6 dB at 17 Hz with corner loading.

Ah, there's my dessert now. Yum."

Art Dudley is wrong (Stereophile)
Constantine Soo is wrong (Dagogo) http://dagogo.com/Events/2008RMAF/Coverage-I.html
Martin Colloms is wrong (Hi-Fi News, Stereophile, Hi-Fi Choice, Hi-Fi Critic) Stereophile technical advisor
B&W designers are wrong (they like the AN E more than the D800 and they made the D800 - LOL
SEAS designers are wrong
Richard Austen is wrong (Dagogo)
Paul Messenger is Wrong (Hi-Fi Choice)
Steven Rochlin is Wrong (enjoythemusic)
Bob Neil (Positive Feedback magazine)
Chris Redmond (dagogo)
the best sound of the show (6 moons) http://sixmoons.com/industryfeatures...83/vsac_2.html
Jack Roberts is wrong (dagogo)
Peter Van Wellinsward is wrong (speaker designer, Stereophile technical advisor)

Please - I am happy you like the B&W model _____ - enjoy it for many years.