Thiel Owners

Thanks Tom

After looking at images of different Thiel speakers I'm guessing that most just have speaker fabric covering them , since the 2.7 and 3.7 have the same design coaxial speaker that are not recessed that they might be the only speakers with a metal honey cone dome covering them for protection . 

Found this 3.7 with a unique woofer  smileypete.com

Interesting woofer indeed. I wonder if that might have been a development prototype. Its acoustic center would be farther back than the star-plane unit. Smileypete.com is a local Lexington business rag and that article was published before Kathy sold the company. So it's not necessarily from out in the wild.

The 2 large conical shapes, one smaller than the other, by appearance don’t seem to align symmetrically which I think is a good thing. The stepped alignment of the cone segments themselves would reduce a polarity of shear from traveling and returning back into the cone and again becoming a part of the next signal. Purify drivers have a stepped surround which I believe serves a similar though unintended purpose for reducing shear wave interference. A shear wave can only travel thru solids and travels in 2 directions until it collides into another and splits again and again. That is why the grill frame material and shape is important and can be heard when the style is changed, or when the grille is removed. This wave action and their collisions is generally not well understood but is used in the study of seismology and should be used in acoustic design and implementation... TomD

Happy Friday! All