Don is one of those very down to earth people that is lovely to listen to, pun intended . He was the one that discovered navy research for sonars in building transducers with unified patterns and applied it home and commercial speaker systems. CBT as it is called, has incredible benefits which he explains yet they are deceptively simple to build. It is one of those "cheat the laws" of physics kind of things.
Even though this presentation is about CBTs, he contrasts them frequently with how traditional speakers work including some really nice animations. Unfortunately everything is in short-hand so you may have to pay close attention. Topics covered are speaker lobing, effects of floor reflections, line arrays (what they are and aren't), horns, directivity, etc.
The videos are all HTML 5 so you can speed them up (I suggest doing that for the first video):
Even though this presentation is about CBTs, he contrasts them frequently with how traditional speakers work including some really nice animations. Unfortunately everything is in short-hand so you may have to pay close attention. Topics covered are speaker lobing, effects of floor reflections, line arrays (what they are and aren't), horns, directivity, etc.
The videos are all HTML 5 so you can speed them up (I suggest doing that for the first video):