Mapman: Lafayette Radio!!! I worked there one year in college, 1982-1983. They were already owned by Circuit City, but still doing biz as Lafayette Radio. I was in the store on 45th St. in Manhattan. That street also had a number of other hifi stores.
Peterr53: You are correct about the "super-tweeter" definition. But consider that different models of the x000 might go a bit higher before handing off to the tweeter. And, again, I remember that the old Ohm web site did mention something about a 7kHz crossover (actually, just a resistor on the tweeter, as the main driver rolled off naturally above 7 kHz). A very rough phone app RTA showed that my in-room response did indeed tilt downward as the frequency rose. I actually expected this, and I am quite pleased with it. I do not feel as if I am missing anything in the higher frequencies at all. They are just a little subdued, which makes the system listenable for hours and hours with no fatigue. Could they be better? Sure. That's why I am following your posts so carefully. While I could never do what you're doing, I might pay someone who can to do these things. A bit of a risk, but if the results are as significant as you suggest they might be, maybe it's worth it.