A very informative and interesting read. Thanks for the huge effort put into this, Tom. It makes me wish I had them as studio monitors, but I'd have to sell a ton of stuff to do it.
There is a little more information on the origin of IMF in the paragraph at the bottom of this page: http://www.t-linespeakers.org/classics/radford.html
It seems Radford was a significant if ineffective player, and the original designer of the TL section was Bailey, which is no surprise.
I...
I believe this is the point being missed by so many in this sort of discussion is that the speaker should have no "life". The life should be in the recording.
The ideal listening room, allowing for the inevitable compromises forced by the practicalities of life itself, has absorption to deal...