The best speaker you ever heard?

First of all , i think that it can not stand alone as there are other factors into this than just the speaker itself . And many of us might not be so fortunate as to hear " The best speaker " with a lot of different amps. and cables to make sure its still the best.
And also what brands do one have in the area where one lives. !

Well apart from all that the best i heard so far has been Wilson Audio Sasha 2

This system recently changed my life: https://www.wilsonaudio.com/products/alexx https://dandagostino.com/products/relentless-monoblock.php https://dandagostino.com/products/momentum-preamplifier.php http://www.msbtechnology.com/dacs/reference-features/

The revel salon2 was the best sounding system I heard til I bought them and brought them home. now I disagree with the OP and while speakers are important all the pieces of the puzzle have to fit in a hi rez system for it to be musical.

Dead on Steve.  This is why they call it a system.  Synergy is important. Find a speaker you seem to love in your price range and then match the components.  Too may folks just buy and sell speakers and then trash them or wax poetic.  JMHO

Kraco 6x9, 2 ways.  It's all in the cables. I used lamp wire for one and a $42,000 solid core meteorite sourced ore with penguin foreskin insulation on the other.  My Fiero never sounded so good!