JohnK:
You are correct, I miss-spoke. The open baffel di-pole design allows the creation of a null at the sides of the speaker which cancels bass reflection from the side walls and thus removing the common placement issues associated with most other designs, that are able to generate bass to +/- 20 htz. It also removes cabinet resonance and propagation issues since there is no cabinet.
The only other design that does bass as well, that I have experienced, are horns. However, my listening room does not have enough room to accomodate two refridgerator sized bass units.
I did not state that the EP's are perfect. In fact, I said that "I don't know if they are the best." But to my ears, the combination of the open baffel, di-pole, and waveguide (horn for the treble), plays any type of music extremely well.
And I stand by my assertion that "I have not heard a more accurate, revealing, live-sounding, and dynamic pair of speakers."
For a more detailed explanation, and no doubt a better written one, see John Potis's new review of the EP's in Positive Feedback.
http://www.positive-feedback.com/Issue38/emerald_physics_2.htm