liquid sound

Sure. My system has been "non-liquid," and with the right (or wrong, I guess) source material, remains capable of being "non-liquid." By "non-liquid," I mean edgy, grainy, not well-resolved, even perhaps subject to mild distortion. In short, harsh and unpleasant, or "unmusical."

"Liquid sound" is very similar to banking, IMHO. It means loose and easy credit. Just like a loose and easy speaker. One thinks of the old naval term "three-sheets to the wind". So it would be the opposite of a system with control and precision - something warm and full of bloom and harmonic bliss. Nice pleasant cosy sound all the time - whatever you play.

Alternative defintion could be Jax2 with his pinup customized paper bag over his head. ;-)

I was flipping between a tube and digital amp a while back. I visualized this in textural terms like the difference between running your hands over grass compared to polished glass. The harmonics get thrown at you a little differently. I couldn't say one was better, just different.

Minimal distortion

When I describe my system as "liquid" I mean to imply that the performance flows effortlessly between my speakers - not from them but, rather, creates a holographic presentation of the performance. Liquid, to me means no grain, no edgyness, perfect (or close to it) integration of the bass, midrange and treble. I mean to imply that my speakers have dissappeared and just the music drips into a 3d soundstage. It's a beautiful thing.