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
Detlof, I am assuming that your friends have the Excaliburs with the 15" woofers. Listening to my Triolon Excaliburs and comparing them against the Campaniles that I previously owned, I assume that a horn loaded bass would be the ideal way to go with these speakers (Spharons?). Do your friens biamp their Excaliburs? If so, what amps do they use?

Thanks in advance for any help that you can give me.
Fcrowder, actually they use a pair of sub bass boxes of German origin, the name of which eludes me. They are servo controlled and cleverly adapt to the sound field in the room. Don't ask me how, but if you switch them off, the entire soundstage in all frequencies becomes slightly diffuse. The last time I was at their house, they used the Wavacs, I cannot say if it was the 50 or the 1O0 watters and they did not biamp. Before that he had a a pair of modded Tim de Paravicini amps, but which exactly I can't say.
In my limited listening experience, I would say the B&W802D are the best I've ever heard. Would love to audition some Wilsons though.