What component is responsible for dynamics ?

I remember reading a post many years ago on Audio Asylum where a recording engineer measured the compression of dynamic peaks in various loudspeakers, and found a strong correlation between loudspeaker efficency and preservation of dynamics. Unfortunately that post has apparently been removed so I can't post a link to it.

Duke
dealer/manufacturer

The system as a whole and it's synergy with each component and connection are responsible for how dynamic your system is.

It will be the amplifier,if it's tube,it's circuit design and component used.Next is sensitivity of the speaker,the higher the better.

All aspects of a system matter. It would certainly be an advantage to use high efficiency speakers with an undemanding impedance load.