The best speaker you ever heard?

I have heard the all TAD system at Pioneer Plaza in Japan, at their TAD showroom. Was shown around by one of their senior execs who happened to be there...a true gentleman. I was very very impressed...on Glenn Gould, I appreciated the clarity of the fingerwork by Glenn Gould...but found the tonal weight of the piano keyboard particularly in the middle a bit hard/light. Simply my opinion...and who knows...maybe it was recorded that way. But I have heard this recording for years and years and on multiple systems. And with the ones I preferred, the tonal balance and weight of the keyboard sounds much more like when I used to study piano. Nevertheless, I fully appreciate the appeal...and think it might be that the whole system could be setup more to my personal taste with a few different components rather than a necessarily deficient design or system. I don't think it would take much. in the end, I admit it did not compel me to investigate further. YMMV.

The more I start listening to higher end systems again, I find that it's most important to listen to any speaker in a true system that is put together for that particular speaker. I've heard some great ones sound poorly and visa versa.

Agree Ctsooner...and it also needs to be set up for the listener's personal preferences. I realize in extreme examples particularly, it makes perfect sense as we all hear differently. some of us measure the frequency response in-room...few measure our hearing with an audiogram. If you have a slight high-frequency hearing loss...you certainly will perceive 'even' sound differently than someone with 'perfect' hearing. And both of these tests probably don't test for 'everything' that human brains use when hearing music, so the tests don't show everything either.

and at the end of the day it really is all about what you hear regardless of measuring. I fell in love with soundstaging and imaging. That was due to the proacs being more involving that way than other speakers I heard. I've since realized that my Proacs are even better than I tought when I got the new Ayre amp set up to it. I could keep it forever, but I like the Vandy sound better right now. Some wouldn't agree adn would rather hear Proacs. I can live with either and love them. Threre are a ton of speakers I coudl love I guess. Most would feel the same way if they heard them set up properly.

This speaker features 12 NEO 10 planar ribbon push pull drivers, 32 NEO 3 high frequency drivers, 8 woofers and 2 supplied 1200 watt woofer amps. They are amazing I have owned Wisdom Rush System, Genesis 200's, Magneplanars and Apogees.
No comparison the new flagship BG speaker is in another league. The speaker can be used passively with one amp or you can order them for use with an electronic Crossover.
If you do not believe me check out Dr. Sakakini's You Tube Video Key Words: BG Radia Dipole800/FS880
Although these are the prototypes the actual speaker can be found on BG's website.