"The reason is when two or more wavefronts converge on a single point in space, in time and in phase, they sum additively, load that point with pressure, and present a cleaner response to neighboring frequencies by reducing out of phase cancellation."

This is called Wavefront Acoustics. I can vouch for the reduction in out of phase cancellation. I could not make out the snap of drumsticks on the drumskin or the snapping of strings with my EP600. I don't have that problem anymore with the EP800v4!

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated