Marcel - marvelous work as usual.
I found that the DE500 was the best 1" driver that I had seen (at that time.)
1) Ath can't create this kind of shape directly. You would have to prepare a simulation manually - you already have the STL model, people here seem to be doing this regularly, but I have no experience with that.
2) You could create a similar shape via Ath by means of the 2-profile geometry, i.e. as a throat adapter + flat/bended board segments.
ABEC script import in AKABAK is still limited and does not work for all Ath projects.
From the manual:
Form - Import ABEC Projects (6800)
| Observation and multiple scripts. At import multiple scripts are compiled to one single script. This may have implications on specifications of ABECs sections such as Driving_Values, Control_Field, Control_Spectra. These will be imported and applied. However only the first occurrence, all further sections will be ignored. |
The simplest answer is still to use ABEC with Ath, the link to download it is still on Marcel's website.
You can rebuild the ABEC project in AKABAK manually but it is a bit of effort and requires understanding how to use the program more.
Like this, if that's what you're after (script attached) -
You'll probably need this: http://www.at-horns.eu/release/ath-4.9.0-pre-release-220919.zip
Last edited:
This type of horn is very good for high frequency dispersion, only you need to set xover frequency higher.
Is there an easy way to modify that so that the top and bottom walls have some flat spots to make it easy to integrate midrange drivers/ports?
Can I tell you how glad I am that you made this post? I spent hours last night, tweaking one of my models, because I was convinced that the phase being all screwed up was because of some mistake I made in the ATH config file.
Sure, flat segment(s) can be added/inserted anywhere, e.g.:
Code:
Horn.Adapter = {
...
}
Horn.Part:1 = { ; flat walls
L = 0.4 ; --> 0.4*Length
Segments = 1
H = {
k = 0
s = 0
a = 15
}
V = {
k = 0
s = 0
a = 20
}
}
Horn.Part:2 = {
...
}
...(Flat wall is a special case of OS-SE profile for k=0 and s=0 - https://www.desmos.com/calculator/3lqoxbyfbl)
Last edited:
Marcel since ATH can generate slices then don't you want generate gcode directly? Lets say 1.5mm nozzle printing 3mm width with variable layer height. See overhang challenge: https://fullcontrol.xyz/#/models/2d37a5
vase mode guarantee perfect surface and then you can print another shell glue together pour something inside and glue speaker mount. This is essential for large waveguides over 40cm.
vase mode guarantee perfect surface and then you can print another shell glue together pour something inside and glue speaker mount. This is essential for large waveguides over 40cm.
Some ATH designed horns in the wild in the UK!
610mm diameter with Radian 745neo and 2 x Purifi bass. Crossover with AudioLense.
https://www.hifiwigwam.com/forum/threads/wam-show-stoke-2022-photos.112417/post-2307954
610mm diameter with Radian 745neo and 2 x Purifi bass. Crossover with AudioLense.
https://www.hifiwigwam.com/forum/threads/wam-show-stoke-2022-photos.112417/post-2307954
I have added to the script mabat posted here (with some help from my freind Emily as I don't normaly write Python). I have added an extra command '11' that creates a sketch plane from 3 points. The first point becomes the origin of the plane, further draw commands in 'x' and 'y' are relative to this point and on the plane. This way cross sections of bent horns can be created. I also added command '60' that lofts all the sketches. As an example I have attached the script that draws a low res version of half my dual driver manifold. At the moment there is an issue with the ends of the loft distorting, I think this could be fixed with guide rails. Also if a high number of profiles is used an error is sometimes given about self intersection which probobly has the same cause.
The way I do it is that, except the first and the last one (which are just a circle and a rectangle), the profiles are all composed of four individual spline segments, connected at the "corners". As you have sharp corners at the exit, I think that's the only correct way without any undesirable effects. As a result the sharp corners start emmerging already near the throat.
BTW, the bended board construction also allows an easy making of a big mold - I want to try concrete casting. All in one piece, including the adapter (3D printed part of the mold).
Last edited:
Now found some time for trying around. However something runs not smooth. If I use the code from Mabat's Post
https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-7131988
I get very scattered results. I tried to normalize it; however the scattering behaviour remains. What am I doing differently maybe?
I saw that the setting for ABEC mesh resolution is only at 1000Hz in the script. Is that correct? I always assumed it must be at least equal to the highest frequency of interest?
Of course scaling is different in my view but you can clearly determine the unsmoothed response. Mabat: are your results usually with some smoothing applied?
H:
https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-7131988
I get very scattered results. I tried to normalize it; however the scattering behaviour remains. What am I doing differently maybe?
I saw that the setting for ABEC mesh resolution is only at 1000Hz in the script. Is that correct? I always assumed it must be at least equal to the highest frequency of interest?
Of course scaling is different in my view but you can clearly determine the unsmoothed response. Mabat: are your results usually with some smoothing applied?
H: