After a decade of so of enthusiastic amateur speaker building marked by more failures than successes, in the late 80's I embarked on a quest to uncover "what really matters" in loudspeaker design. Poring through back issues of audio engineering journals, I concluded that it was important to do a good job not only with the first-arrival sound but also with the reverberant field. It was not until the early 2000's that I learned how to control the radiation pattern well enough to optimize the reverberant energy, and this can be traced directly to working with Dr. Earl Geddes. I built my first commercial loudspeakers in 2005, my first constant-directivity waveguide speakers in 2006, and in 2007 introduced my first controlled-pattern offset bipole design. Lately I have been working on a few prosound designs as well as more affordable versions of my home audio systems.
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http://www.audiokinesis.com/
Duke LeJeune of AudioKinesis explains the theory behind the controlled-pattern offset bipole loudspeaker, and demonstrates how this configuration can – if used correctly – lower room-related frequency response anomalies.