Acapella ion tweeters


Does anyone know about Acapella ion tweeters (specifically the TW1S)? I would be interested to know about the following:
1) If you have any experience with them, are they really the best out there? Are there are other tweeters which can match their speed? Are there others with similar technology?
2) Did they have ozone problems at one point or do/did all extant versions of the TW1S have it licked?
3) Are they now available separately? I remember reading in a post many moons ago that they only came as part of their speakers (I believe the mysterious Detlof was the author) but the website has a separate listing for them. And if available separately, does anyone a) have ANY idea what they might cost? and b) who in the US or Europe (or even better, Asia) might sell them?
Thanks, Travis
t_bone
At an audio show years ago John Dahlquist demo-ed a system with Ionovac tweeters. Sounded very cool and open .The hotel room was also cool with the windows open to exhaust the ozone buildup..
Thanks to all for your advice. The story: when I went back to purchase the tweeters the day after my post, they had already been snapped up by someone else. Aargh! My interest has been piqued, however, so I will continue to look.
Thanks all, Travis
$6,000.00 for a pair of tweeters??? I have a hard time believing these can really be 4 times better than a pair of Raven R3.1's
Vahe, hearing is believing. You cannot even imagine how good they are. I couldn't either until I heard them for the first time and I'm not even exaggerating. They are probably the most important piece of equipment I've ever obtained in my long career as an audionut and they are worth every buck spent. Besides, don't forget, they are powered, have their own dedicated tube amp, are built like a tank, completely ozone free and beautiful to look at.
Hey, guys check out http://www.ee.vill.edu/~cdanjo/plasma2.html I once had Ionovacs. They were truly exceptional, making you think all other drivers were crap, which of course is true. I tried them with double Quads, Linn Isobariks, Fulton Premiers, and even Klipsh corner horns. They always stood out as better than what they were mated with. Ultimately I gave up and sold them.

Since the Acapella tweeters are the outgrowth of the Ionovacs, I am truly amazed that they can pull off mating the tweeter with horns and an enclosed woofer.

I have Beauhorns and have been tempted to try plasma tweeters, except that I well remember my experience with the Ionovacs. I am, however, looking for a pair of Coronas if anyone, Detlof, knows where I can find them.

Norm