waveguide speakers

Perhaps a place to start on waveguides:

way/103872-geddes-
waveguides.html>http://www.diyaudio.com/forums/multi-
way/103872-geddes-waveguides.html

buys/166312-waveguides-
horns.html>http://www.diyaudio.com/forums/group-buys/166312-
waveguides-horns.html

My own speakers, Auto-tech's Mummy
MkII, are equipped
with a 12" so-called OSWG
waveguide(1" throat, fed by a compression driver) and a
12" mid/bass driver, incorporated into a heavily damped
fiberglass housing/enclosure, and they sound wonderful.
Here's a review of them, if it has any interest:

mummy/>http://hifipig.com/yummy-mummy/

I've been a proponent of waveguide-based speakers for some
years now, starting with S.P. Technology/Aether Audio and
now the Polish-based Auto-tech speakers.

Feel free to ask away on specifics with regard to my
impressions on the sonic advantages of waveguide-based
speakers here mentioned.

You really should read the GedLee site. There is a ton of info there and Dr. Geddes is just brilliant.

I couldn't be happier with my GedLee Abbeys.

Also do some research on Audiokinesis speakers and their design principles. Dr. Geddes was a mentor to Duke LeJeune and both use waveguides in their designs.

Or if you are into DIY, check http//www.diysoundgroup.com

As indicated above, Geddes is an expert on this. I have heard that Genelec was the first to produce speakers with waveguides. I have Mackie HR624mkiis that have waveguides and love them - way better than the "audiophile" speakers I have owned in the past - BW 805s, Acoustat, Rogers, Advent. Undoubtedly the waveguide has something to do with it since it allows dispersion to be controlled, particularly in the crossover region - it flattens the power response to that of the direct response and reduces early reflections as well. See the Geddes website - BTW the Mackies have a similar measured response (flat on-axis and smooth even tapering in the highs off-axis even in the xover region) to the Geddes speakers.

The foam plug that Dr. Geddes uses is patented and a key part of the WG design. With over 21 patents, he has a clue!

Look at the bottom here. http://gedlee.com/Earl_resume.htm