What component is responsible for dynamics ?

Simple question, simple answer. Speakers

Ralph, my experience is exactly as you describe but interestingly, much more so when the Acoustat amps I'm speaking of are in bridged mode. Far more dynamic(or distorted). In either case, very life-like. In stereo it is much more source dependent.

Charles, could you please explain the difference between 'realistic' and 'Hi-Fi' sound? I've seen this comparison before but no explanation.

Oh. I thought Hi-Fi was the highest rating. Thank you.

In that case I would have to rate my system as 'Hi-Fi' since I am not fooled by it. However having said that, I can't help referring to a statement I made on another thread about a Charles Mingus true direct to disc vinyl recording I have that 'will' fool you. So where is the dividing line between source and gear? It seems potentials are at the center of this issue, no?

Last two posts are not in order. Charles, I truly did think that. I concur with your definition. It's just vernacular.

Actually, I thought Hi-Fi sums up all other hi-end terminology.

Imo, even that premise is relative. I have no doubt there are recordings that if they can't fool you just because you know they are, you will still conclude it sounds real. I happen to have one.

I will add that this ability is far more dependent on the recording than the gear.