The dynamic range refers to the difference in levels between the smallest and the largest playable sounds. The graph below shows the dynamic range at 1kHz.
Figure 6. Dynamic Range
Chart 3. Dynamic Range
A larger dynamic range allows for more variance in the loudness, and in turn a clearer sound. Equipments with higher dynamic ranges present crystal clear sounds out of complete silence, while those with lower dynamic ranges are dulled and somewhat foggy.
This area doesn't have too much in relation to the frequency response - it pertains to the efficiency of the product, which is a measure of how intense a sound is produced when input a given signal. Generally, more efficient units are able to express finer sounds, and will benefit even more (in fineness) from a response peak around 7kHz.
^So for example, in the driver, you have the magnet efficiency, and the stiffness to weight ratio in the diaphragm, like Titanium versus paper.
For example what is the main difference between the Denon D5000, D7000, and Fostex TH900? The magnet design.
Edited by kiteki - 7/4/12 at 6:55pm