Tractrix Horn Vs Exponential Horn4/13/2021
The second was bolted to the first for the lower side of the upper horn, and the top one was the upper portion and mounted to the tweeter, so exit was between the upper 2.
Tractrix Horn Vs Exponential Horn Driver Mounted OnIn the case of the Duevel Bella Luna, they use a compression driver mounted on a carved wooden horn, with some kind of exponential cone suspended in it like a trombone mute.I understand they are trying to encourage a 360 degree donut of sound (not exactly a true omnidirectional design.Back in those days I made some of his tractrix horns, and had many phone conversations with him. The interview probably has the most about different design types. I suspect most of what you want is in AES papers, but I dont have access to those. I have some books of collections of AES papers somewhere, but its not easily gotten. Haven t looked on DIYaudio, but I think you might find it there as well. Steve. I havent been there yet Basically Im after any info that would guide a design process if I wanted to try and replicate the Duevel design philosophy for myself. I see a lot of speakers marketed as omnidirectional employing that kind of cone-over-woofer arrangement to get dispersion. Either theres something to it, or its a rampant case of Monkey See, Monkey Do. If you look at the total cross-sectional area as you move from the throat to the mouth, you would see a similar horn loading that you will see on a straight horn with equal cross-sectional area. Ive built one similar to that shown above as a prototype for a project. Unfortunately, I havent found the time to finish up the project. Horn Response program is a way to convert horn theory into practical designs. Ben - I think you said the Duevel design is simply a horn with a diverter of equivalent contour sitting in front of it (like a perfect fit negative of the horn if you made a casting inside it). If I were travelling down the wall of the horn, it would be same distance from my floor on the horn to the ceiling of the diverter. I guess I just give folks more credit and assume the designs are more complicated than they might be. He had 6() of the Dayton 12 waveguides, a pair of RS270, and a set of TLabs tweeters.
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