The best speaker you ever heard?

Dracule -- a rule of the thumb: when driving TWO spkrs together inside a venue and feeding IDENTICAL signals, you get +6dB over the rated sensitivity of each spkr measured individually. But in the Synergies case, the spec is for music spl -- i.e. not identical signals, so the extra gain is less, say 4-5dB over the single spkr. So, the single spkr would spec 95-4 or 5= 90-91.
3dB: to go up (or go down) by three dB, you double the power (halve the power).
Cheers.

Acapella High Campanile.

Salk HT3 by Jim Salk. Hand made 3-way with ribbon tweeter. crossover by Dennis Murphy.

gthomas

JMLab/Focal Utopia with the Be tweeters's (any of them depending on your room size). Most transparent speakers around, high sensitivity yet full range and great with most any high quality amp (particularly tubes in my experience). Several cosmetic options. Not cheap but worth it.

Ah..Pgulrich, before you claim the JMLabs with Be tweeters are the "most transparent speakers around", have you heard the various current electrostats (SoundLabs, Audiostatic, Innersound etc), ribbon speakers (Apogee Synergy, Analysis Audio), and horns (Acapella with the plasma tweeter, Avant garde)? I've heard most of these speakers, and transparency is not one of the standout features of JMLabs (Grand Utopia Be) in comparison.