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
I spent some time at a friends house today listening to the Raidho D1. This was the best sound I've ever heard to date, on all genres of music. In all fairness, the entire set up was very well thought out and my friend does own a high end shop. He was also using the Raidho stands. If I had the money I would buy them without thinking twice.
I don't think I'm ready for ceramic drivers again. I think the B.M.C. Arcadias sound much better than any of the Raidhos I've heard.
I personally have loved most any speaker using a carbon fiber variant for the Tweeter and a fiber Mid range. Just very natural and open as heck. FAST is a word that comes to mind. I have heard ceramics sound great too, but not like carbon drivers when utilized properly.
Quadral Speakers, I have the Platinum M50 as Main Speakers and are awesome. Better than many big brand and costly speakers.