Duane, the plasma tweeter in the Acapella's is not a compression driver. Go to the Avantgarde website and learn why they don't use compression drivers either. Horn doesn't always mean compression drivers. But compression drivers done well sound great. I have a friend with an ALE compression multidriver system that's incredible. Why do recording studios use TAD compression drivers if they are so bad. These are people who listen for a living. There are great and poor examples of just about all types of drivers but it's dumb to say all box speakers are no good or all planar speakers are no good. Every type has it's advantages and disadvantages. I've had Sound Lab A-1's and Quads and some great box speakers too but at the moment I think my Avantgarde Trios are way better but still not perfect.
