Advantages/Disadvantages of D'Appolito

[jaxvon]

I was just wondering what are the advantages/disadvantages of this type of driver arrangement on a speaker. Surely there must be some good reasons for not going with such a design, such as Axiom's M22Ti speaker.

 

[WmAx]

This has been discussed on this site in the past(search engine).

However, there is a good paper that describes the disadvantage(if you are interested):

Vertically Symmetric Two-Way Loudspeaker Arrays Reconsidered

Preprint Number: 4186
Convention: 100 (April 1996)
Author: Konar, M.

Fortunately, this is one of the few papers that was also made available by the author online freely:

http://www.birotechnology.com/articles/VSTWLA.html

-Chris