What component is responsible for dynamics ?

this is a great question. the same should / could be asked about soundstage. I wish someone would answer it. There should be only one correct answer.

Rok ;
Yes one correct answer would be nice . But usually just a major consensus is the best that there is .

It depends on what you are currently using and your room. Without knowing the details, it is impossible to tell.

I think you have to start at the source. The dynamic range of a cassette tape is 90db or lower at best, whereas the dynamic range of SACD (I believe) approaches 110 db. Db's being a logarithmic scale, this is an incredible difference. If it's not at the source, good luck reproducing it down the line.

But still if I were to choose one component, I would say turntable in purely analog system and power amp in purely digital. To put aside horn speakers for the moment.