[Duke]

This article is a several years old, but gives a good description of the dispersion characteristics of different speaker types: 

http://www.enjoythemusic.com/magazine/bas/0508/index.html

Once you've read that article, if you haven't already done so, you might want to read another (by yours truly) about a type of speaker that combines some of the qualities of constant-directivity horns and dipoles (though it's not a dipole):

http://www.hifizine.com/2010/06/the-controlled-pattern-offset-bipole-loudspeaker/

And, here's a further refinement of the concept:

http://www.audiocircle.com/index.php?topic=86905.0

[Clio09]

Thanks for the great read Duke. Unfortunately now you have me thinking Jazz Modules vs. Strato Prisms.

[Duke]

Thanks for the great read Duke. Unfortunately now you have me thinking Jazz Modules vs. Strato Prisms.

Sorry my friend - that wasn't my intention!!  You're already tied for first place in number of AudioKinesis speakers purchased, I'm not trying to go after you again.

Duke

[Clio09]

I'm only tied for first. Now you've really put the carrot under my nose:)

In all seriousness I have been contemplating getting ESLs to pair with my S-30 while I use the Jazz Modules with my SET amps. Either some refurbished Quad ESLs (57s or 63s) or older Sound Lab A1s. However the Stratos Prisms look quite interesting and if they come close to an A1 could be an option.

Can a Jazz Module be converted to a Stratos Prism?