The best speaker you ever heard?

Not the best, but most memorable. In a dorm room, pair of KLH 17s driven by Dynaco st-70 playing Doors Hello I Love You.  Punchy juicy sound, probably colored with distortions.  But, boy, I loved it.

I listen mostly to classical music , Bach in the day (pundit ) the KLH 17's were as musical as any speaker you could buy period .

Tri amped Koss Model One
Infinity Reference System 
Big Snell speakers
Original Sound Lab

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/