Yes, in the 1990s there were a couple of Thiel reviews wherein JA acknowledged the "suckout" was probably more a result of his techniques than actual performance. From the CS2.3 measurements section:
There was at least one other Thiel review wherein he said something similar. But I think he didn't write a word about this in any Thiel review after ca. 2000. I am thankful for how JA built Stereophile up, particularly, becoming the only US audio mag with subjective reviews *and* measurements (even if the measurements have obvious faults, at least they're applied equally to all products). But present day Stereophile is not for me.
The 50" mike distance I use is a compromise between the need for correct drive-unit integration and the opposed need for midrange resolution in the resulting graph. But it is possible that the lack of presence-region energy in fig.3 is actually due to the 50" mike distance and is not real, in that it disappears at the farther distances at which a speaker like the Thiel will be listened to.
There was at least one other Thiel review wherein he said something similar. But I think he didn't write a word about this in any Thiel review after ca. 2000. I am thankful for how JA built Stereophile up, particularly, becoming the only US audio mag with subjective reviews *and* measurements (even if the measurements have obvious faults, at least they're applied equally to all products). But present day Stereophile is not for me.