What component is responsible for dynamics ?

Face, Whats say your monitors are 4ohm and your floorstanders 8ohm the monitor is 92db 1 watt your floorstander is 89db 1 watt. There will be little difference in volume levels.Also one manufacturer could have estimated specs or rounded up or down etc. Now if your floorstanders are 89db 8 ohm and you compare to a 110db 16 ohm horn think you will find your increased dynamic range.

Comparing a small monitor to larger box floor standing speakers misses the point entirely.
Charls

So as is typical on such posts, the answer is everything and nothing.

Tbg,

That's because the answer is all of it. Each part in the chain
contributes to the sound. Or in this case the dynamics.

It is a silly question that's why so many silly answers/non answers.

Chad,
Actually many posts do agree that all components matter. If someone was putting together a new system, high efficiency speakers would just be a very good and logical place to start, that`s all. This would avoid the mandatory need for a huge mega watt amplifier as a prerequisite to obtain dynamics.
Best Regards,