Funny you should say that. I'm currently playing with some Alpair 7.3 drivers for mid and treble use (dipole, over W-22 "lower-mids") and finding them quite nice. The Fostex drivers that I heard at Burning Amp a couple years ago reminded me of nothing so much as the '40's vintage table radio of my youth. "Un-listenable" is almost too kind . . . I quickly fled the rooms where they were being demo'd.
Haha I wonder why they sound this way.
These are 126E and 206 frequency response.
With some quick DSP they could be made better. Not a fan anyway.