Nov-23-2011: This is an interesting article by Alvin Foster, member of the Boston Audio Society (BAS). It was originally published in May 1999 in the BAS Speaker (BASS), which is the newsletter of the society (Volume 22, Number 2). The link embedded in the document was recently posted in a discussion at diyAudio.com. I have created the pdf with my comments and markups.
Over the time I have obviously come to many equal conclusions as the author.

Jun-22-2011: Initially, I did not want to link this because it is available from other places. But I am still so pleased about it as matches my personal experience so well. Increased directivity and less excitation of room modes etc. cannot be the only reasons why dipole bass sounds like it does compared to monopole subs. And I still wonder how cardioids and multi mono sub arrays would compare.

Nov-12-2010: Photo show about the Seas factory.

Oct-15-2010: Video about the Scan-Speak factory.

Last updated 30-Dec-2011