Some good news to share....

I have made arrangements to have the original Luna tested in a true anechoic chamber. This will, once and for all, give me the answers I seek and provide some closure.

I will have to ship the speaker to Norway (SEAS), but our friends at SEAS are happy to run the measurements I have requested. SEAS also uses Klippel measurement gear (not the NFS though since they have a chamber), but all Klippel gear is based off the same software and same hardware analyzer.