Question: Does ATC have the best midrange driver?

What is "best" is obviously going to be quite subjective and personal. As to the ATC stuff, it appears that they have the same loyal follows that tend to cheer on Bryston gear. To each their own.... Sean
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I don't know if they are the best. I know Mr. Dunlavy doesn't feel the dome midranges are worth a flip, and I don't know the physics or reasons behind it. Obviously there is some time delay between sound coming of the edge of the dome versus the center, just like in a dome tweet--one more type of phase distortion. E-speakers lists a new Zellaton driver that claims one of the best and then Skanning makes a nice 4" driver. I really couldn't claim them as the best. Loudspeakers are systems, and one driver isn't always superior since the application matters. If someone wants the even dispersion characteristics of a coaxial type loudspeaker, you won't get with ATC, you'll have to go with volt, cabasse or others. I don't doubt the ATC are nice units and better than alot of stuff. But there are so many international companies I'm sure I'm not aware of what they are doing-who knows all the stuff the Germans are doing.

i don't cheer on bryston gear. and when you consider that sony and pioneer (to mention *only* two) master all of their dvd's and SACD's on them (instead of using their own speakers), there is a bit of a rave professionally. they've only recently started selling to the consumer market.

I have listened to the ATC flagship speaker ($15000, I forget the number) many times at a friends house and it is one of the nicest setups I have ever heard. The music just floats around the speakers in a fashion that had me calling them "Quads that play really loud". I always felt the bass driver was not fast enough for the superb midrange but that was a minor quibble. That system is just plain awsome. It is the first time I have ever really enjoyed listening to an all solid state stereo. When watching TV I was drooling over any music playing (listening thru Direct TV satellite) it was that good! I know this sounds a bit overboard but you have to listen yourself.

After this rave I would still buy Sound Labs and Atmosphere amps instead (if I can dream), I am a planer and tube kind of a guy.

I have never heard the ATC's so I don't know for sure. But, the recording industry is not exactly known for having "golden ears" in the past. The previous "most used" monitor in recording studios was Yamaha NS-10's. Not exactly great. I doubt if their ears have gotten any better with the latest "music" that they are producing. ATC may be a great speaker, but having the recording industry unanimously using them is not a testament to their sound quality. If anything it makes me more skeptical.