Hi pos and macaroonie,
Thanks for the link and the file. In any case it would be interesting when ONE DAY some of our AH-forum member would make "independent" measurements with real available 1.5"-throat horns, either on axis and off axis, THD..... etc.
For me personally, comparison with 2" BMS 4590 or 4592ND especially with 'new-comer' 1.5" BMS 4595ND would be interesting...(745 U$D http://www.usspeaker.com/bms%204595nd-1.htm )
Regards
Ivica