[Howard Ferstler]

wrote:
John Atkinson wrote:

wrote:

1. Has the fan blade shape and number been optimized for
minimum noise? That would make installation simpler.

According to Bruce Thigpen, most of the development work
involved investigating and optimizing the shape of the fan blades.

I emailed Mr. Thigpen and he made a very informative reply. He says
they tried 100's of fan blade shapes.

I did an evaluation of this subwoofer design in the
July/August 2006 issue (number 104) of The Sensible Sound. I
live in the same town as Bruce and not only heard the unit
installed in a car but also heard a larger sample installed
in the attic of his home.

I am not sure if the device is suitable for most audio
buffs, but it certainly did generate impressive bass for its
size. It is also the only subwoofer I have heard that has a
driver with a S/N ratio.

Bruce Thigpen is one of the most innovative (and honest)
speaker designers that I know of.

Howard Ferstler