Dynamics In A Speaker

besides what Duke (audiokinesis) wrote about the importance of not putting the drivers into mechanical compression, I think that ivan_nosnibor brings up an important point - cross-overs.
For me the most dynamic speakers are time-coherent speakers that use a 1st-order internal x-over. Not saying that an external x-over would have been better but I’ve not heard a time-coherent speaker w/ an external x-over so I cannot comment.
Assuming that the speaker designer chooses the drivers correctly so as to not induce mechanical compression, dynamics in speaker comes from its actual design....

How about in an electrostatic speaker, same question? Cheers,
Spencer

Spencer, did you manage to get in contact with somebody for your ESLs? sorry i realize it's off-topic.....  

Isn't sensitivity/efficiency a huge factor in a speaker's perceived dynamicism (is that a word ;-?)?

The ONLY relevant factors for dynamics are:

1) sufficient efficiency

and

2) sufficient size.

You need to move a LOT of air easily.

There's no such thing as a small inefficient speaker that's dynamic.  Prove me wrong. :)