The South Bay Speaker Builders had another one of their irregularly scheduled meetings on Jan 14, 2001. It was once again hosted by Andy Unruh. We were honored to have none other than the esteemed Siegfried Linkwitz as a guest speaker. He talked for over an hour about dipole speakers and a host of related topics, then answered questions for about 2 hours. It was a wonderful experience for everyone present.
The highly technical audience asked many questions. Some of the topics covered were DSP, comparisons of active and passive crossovers, parts count, radiation patterns, reflections, diffraction, aerodynamic noise of woofers, vibrations in woofer baskets. binaural recording technics, surround sound, multi-channel playback, extraction on ambient sounds.
One of the things I liked best about the discussion, is that Siegfried tried to answer every question, but if he didn't have a definite answer, he would say so right up front. No BS. This is really refreshing, especially from someone in the business. I really appreciated his candor.
Here are a few pictures I took during the afternoon.
There was plenty of lively discussion while we were waiting for everyone to arrive. Andy seems to be making a very important point here.
Siegfried got started. He used a lot of illustrations. Here he describes an H baffle for a dipole woofer.
Another important point. Siegfried was always eager to tackle any question.
Everyone in the audience learned a great deal.
These are Grand Pops built by Matt York. Really nice work, Matt.
Supurb veneer work on these speakers.
We listened to Matt's speakers for a while. Everyone was impressed that a speaker built with such cheap drivers could sound so good. Maybe the excellent cabinet work helps.
We also listened to these Cherry and Maple beauties by Steve Houlihan.
These use all Scan-Speak Drivers
The stands match the speakers, right down to the curved sides. The relief at the lower back is for the binding posts.