The best speaker you ever heard?


In my opinion, the speaker is by far the most important part of the audio system. After all, it is the only part you hear. OK, the other stuff really matters a lot, but without a great speaker... No go.

I am a bit 'speaker-obsessed' I guess, and now I am wondering: What are the best speakers you have ever heard, and what made them the best?
njonker
Semi, have you heard the Pioneer SX speakers? They use the midrange and tweeter drivers from TAD, owned by Pioneer. I heard them at last year's RMAF and have thought seriously about buying a pair. They cost $9500 per pair!
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Tvad, you may be right. Long ago when John was still just redoing existing Hartsfields, I gave serious attention to them. I guess I just like Altecs more and don't like the lens concept. A friend has always insisted that the Paragons if raised 18" off the floor on a solid platform are the best speakers, but to my listening they sound too diffused almost like Boze speakers.
Tbg, Usher is the only speaker I heard with Be tweeter + midrange, never heard the Pioneer nor TAD and I am sure they are exceptional as well. I like Usher for its look, sound, and price. TAD is weird looking while Pioneer doesn't nearly go as deep as Usher. Usher BE-20 uses 2 Eton woofers per side, they produce serious bass that is tuneful and musical.
Quad ESL 63 and the 989's...but you need a large room to fully enjoy these magical speakers.