Thiel Owners

I received almost enough f10 wool felt to line 1 of my speakers. Really nice product thru Zorro. Took a couple of hours to cut amd fashion the wool around driver openings and the internal port tube. Used spray adhesive to secure all the pieces.

Tom Thiel if your watching.
I could remove the internal 6.5 in long port tube as it by placement must generate a negative influence on air pressure and and increase internal turbulence. I could extend the port length out the back of this design for my room only.Be pretty much a straight shot out the back behind the tweeter location. Your experience on this idea? Might be to ugly for even me and my dedicated room. But sound comes first..Tom

Happy Friday, Labor Day Weekend- ALL

Tom - highly congested territory with more questions than answers. I have been working with turbulent / laminar flow for a couple of years now. I suggest you experiment with an open mind, since there is much more to the area than first appears. As a point of Thiel history, these multi-faceted problems of ports led Jim to migrate to passive radiators rather than ports. Note the model 1 which leap-frogged from ports to radiators, landing on that long, slotted low-turbulence port on the 1.6.

There are too many issues to address here, but note that taking the port outboard exacerbates the problems of coupling the port’s output to the surrounding air. The baffle flush with the port end serves to support that transition. Moving your port outboard may reduce some internal turbulence, but at the expense of increased outboard turbulence.

One thing I’ve learned is that the surface turbulences are audible, that they affect the full-range sound, not just the bass tuning frequencies, and that the particulars of the baffle surfaces surrounding the port have audible effects.

I don’t know how that coin-toss of internal vs external would land. Please keep us posted about anything you learn.

jhouse55,

Go on line and search Thiel outriggers. There is a review from Tom Lyle from Enjoy the Music that shows copious photos of the outrigger for the 2.4SE. 

There was never outriggers designed for the models I mentioned and the ones you mentioned hence my willingness to offer these to the Thiel community.
Rob at Coherent does not have outriggers for the models Thiel never designed them to go with as they came about towards the end of JT life. 
They will be very similar in design to the one Thiel made but the screw taps, length/width, and thickness for outrigger will vary slightly for each model. 
I'm not making one CAD file. I have to make a CAD file for each model then program, then initial set up of tooling before one part is even made. 

To keep cost down to end user I cannot make one as all the cost associated with making one, stated above, is absorbed into one unit. 

I'm keeping a list and when I get 2-3 orders of the same Thiel model from members  I'll provide a price. Doing only one, I will not put all that effort into when I know the cost will be too high per unit.

Tom Thiel,

In my work in designing endpins for cello and endbuttons for violins I met a geophysicist who showed me and explained to me how my devices actually work. I knew they sounded better but was uncertain as to why. She has a patent as how to remove a polarity of shear the mechanical wave motion that causes the air to vibrate. One polarity of shear can create interference in the other polarity, only one is  needed to create vibration of air. Not sure if it is in the vertical or horizontal plane. With the removal of this single polarity you can see in the amplitude response a net gain of over 1 db. This was shown on all the harmonics of an 85 hz note out to 18khz. This interference is like a parasite that travels the surfaces and at some point becomes part of the music. There is a transition or handoff between a mechanical surface shear wave and the air that lays on them and becomes the sounds we hear. 

In the case of speakers I feel I have a large understanding of how to remove interfering energy from the speaker cabinet because there are  devices that can help direct interference out and off the box and into the the floor. 

What I am trying to understand and you are working with I think,  is the transition of the mechanical wave  portion and how the now moving  air is launched off the solid vibrating surface. How to make that air less turbulent at takeoff?
Tom