Must speakers have certain volume to sound convincing ?

Inna,

Too bad you are not impressed with Getz and Gilberto.   Everyone has their preferences.  I happen to like the music, the playing, and the singing, but that was not remotely the point of my post.

The music/playing/singing is a matter of taste.  The SQ on the both the SACD and the Analogue Productions 45 rpm LP is not.  (The former was playing when I heard the SoundLab system that so impressed me.  I own the latter). By virtually anyone's standards (assuming good hearing), it's a very good recording.  By most people's standards, it's better than that.  When you've heard the recording on a well set-up SoundLabs system and still find the recording unconvincing, let me know.

Til then,  I'll file your comment under "not my taste in music" rather than as any kind of informed judgement on panel speakers.

I guess everyone hears things differently, but one of the greatest impressions a speaker has ever left on me was Stan Getz's sax and Astrud Gilberto's voice on Girl from Ipanema as reproduced by large SoundLab panels.  I'm not sure what Inna considers "sounding like real music", but that sure convinced me.

FWIW, I spend a few hours a day with an acoustic guitar in hand or (less commonly) seated at a piano.  I do have the reference at hand on a daily basis.