I am unable to to PM you due to forum privacy settings, but I would very much like the opportunity to audition these if at all possible!Here are some more charts. The first pair contains the response of a far field IR that I could use. The second pair contains the close-mic'ed response of the same cab with the mic position chosen so as to produce a similar spectral balance. The third pair contains the response of a far field IR of an open 1x12 cab (not the same cab as the first two) taken by someone else under conditions unknown to me.
Below is the log IR^2 of the same cab as before (1x12 open back), taken with the same mic at the same distance, but at 20 degrees off axis.
This is its far field magnitude response.
Here's close-mic'ed data for the same cab with the mic placed between the center and edge of the cone.
Here is data on the far field IR of an open 1x12, taken under undisclosed conditions.
I've got all three loaded in my modeler and have auditioned them. Because the third IR is not from the same cab/speaker as the first two, some of the sonic differences are due to that. However, the apparent deep - and very audible - suckouts in its response from ca. 200-500Hz and 1200-2kHz are definitely not due to the intrinsic behavior of the cab and speaker. They are caused by early room reflections that were captured in the IR.
If you'd like to audition these IRs, shoot me a PM.
Regardless, I have been following this thread with great interest and appreciate you taking the time to explain things to us all.