The best speaker you ever heard?

The people making comments including myself, no matter how experienced have limited comparisons. There would be other loudspeaker design we would consider if we heard them irregardless of taste.

Excellent point, Armyscout41. I would bet that few of us have heard more than a handful of speakers in which all other conditions are constant. And I'm certain that many among us would change our response 2 or 3 times in the 5 years that this thread has been running.

Where is the problem ?
The question is just, for everyonge, to tell his favorite speakers !
Not : what is the best speaker in the world !
What is irrelevant, probably, because of the infinity of possibilities of associations between speakers, amplifiers, sources and cables.

Just funny, somehow interesting, to hear what people love the most as speakers, even if they have listened only to a few of them.

Sequerra Metronome 3---This was many years ago. I went to Definitive Audio in Brooklyn to hear the B&W 801; at that time loudly proclaimed as the best Speaker in the World by all the major audio magazines on both sides of the Atlantic.
Well, the Metronome 3 Kicked its A--so badly it was not funny.
From then on, I never again trusted the Mainstream press audio magazines.

BTW nothing I've heard since then has come quite as close to that magical moment.

B&W 801 for voice

Original Quad electrostatics and Avantgarde Duos.

The Quads are the most natural, immediate and alive sounding speakers I have heard. It also is a relatively practical speaker in cost and size. It makes most other speakers sound like, well, speakers. In other words, other speakers seem to make it more obvious that sound is being REproduced through an electromechanical device.

The Avantgardes come a close second but have the advantages of playing louder, deeper and probably higher. They also sounded really big, maybe too big. I've only heard them at a dealer, however.

Other speakers I've heard in demos include Infinity IRS, various Apogee ribbons, various Martin Logans, and the original Sound Labs.

Incidentally, to Armyscout41, the question was "What is the best speaker YOU have heard," which anybody should be able to answer, not "What is the best sounding speaker," which in theory would likely require someone to have heard everything.