Acoustic Horn Design – The Easy Way (Ath4)

@mabat and I've got another question, too — does the driver’s dome emit a spherical wavefront (except in the top octave)? Could that be used with ATH waveguides?

For example, a phase plug on the back of the driver (instead of the back cover) with channels like the ones in your ESP design, but without the need for bends?
 
hey guys, been doing a tonne of reading here, super excited to start working on my own horns, big issue is ive been trying to get the latest version 4.7.0 of ATH, but looks like the download link has been broken for a while, i found 4.6.0 but it refuses to open on both my pc's

anyone have the latest they could link me?
Cheers!
 
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@mabat I decided to try a constant-directivity WG with 1,4 driver. So I already bought A460D and ESP, I want to combine them.

Am I correct that I can use one of the adapters for the 1“ driver (so, which one?) and connect the ESP to it at the throat level where the throat is 1.4”? If I want to increase the horn slightly (like 10-%) would I still connect the output of the ESP at that throat level where the throat would also be 1.4 inches?
Those are not compatible parts, Oleg. When you asked if an ESP can be used with a constant directivity horn, I understood the question as general - yes, but it would need to be designed together. So, you can try anything but it's all unpredictable in this case.
 
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@mabat and I've got another question, too — does the driver’s dome emit a spherical wavefront (except in the top octave)? Could that be used with ATH waveguides?

For example, a phase plug on the back of the driver (instead of the back cover) with channels like the ones in your ESP design, but without the need for bends?
That's exactly with what I started a long time ago, but never made anything actually usable. It was not as easy as it seemed at first -

It would need two lifetimes to pursue all these ideas. Maybe more...
 
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Hi, first time here. I've bought the Triotini_XS files for a DFM2535 build. The Horn has been printed, but I'm confused about choosing the flange type. I'm using FreecAD to view the files but can't make out how it fits.

Can someone help, please?
 

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Those are not compatible parts, Oleg. When you asked if an ESP can be used with a constant directivity horn, I understood the question as general - yes, but it would need to be designed together. So, you can try anything but it's all unpredictable in this case.
That was my plan for the summer, to try anything just for fun. I'm more than happy with the current sound, it just gets boring, and the printer starting to get dusty. 🙂 Besides, I wanted to buy something else to support your work with a couple cups of coffee!

And I'm certainly asking questions in general and realize that only devices fully developed as one unit work best. I don't really want to change my drivers, I like the way they sound, and I like low crossover better than perfect upper octave behavior. And I want to compare the difference in sound with constant directivity at least up to 8-10kHz. Even just a scaled device will allow to check it, I guess that's where I'll start.
 
The Horn has been printed, but I'm confused about choosing the flange type.

As the description says:
Compression driver mounting options with the provided flanges:

Flange type1:
  • 4x M6 / ⌀76 mm
  • 3x M6 / ⌀57 mm
  • 2x M5 / ⌀57 mm
  • 2x M3 / ⌀50 mm

Flange type2:
- 2xM4 / ⌀53 mm

There's also a "lower" version of the type1 flange, just in case that the tall flange would be too tight to fit into the thread (this is a bit difficult to control in advance with 3D printing). The lower one should fit more easily. At first I was a bit worried about the thread and the tolerances, but I think it turned out pretty well, I like this mounting method. You need a decent quality printer, of course, but that's already more a rule than exception these days.

Your prints look quite nice, BTW.
 
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Good off axis means that there is low diffraction (
Whenever there is diffraction there will be a reflection which can resonate back down the throat. This will yield coloration. The effect can often be seen in the electrical impedance as humps.

(At least unless you cut holes in the walls and make additional resonance and diffraction chambers. Then I can no longer guarantee that quality.)
Quite correct.