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Multi-Way Conventional loudspeakers with crossovers

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Old 9th September 2019, 10:30 AM   #171
mabat is offline mabat  Czech Republic
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This is for the infinite baffle. I only changed frequency resolution parameters in "solving.txt":

Control_Solver
f1=800; f2=16000; NumFrequencies=40
Abscissa=log; Dim=3D; MeshFrequency=25000; Sym=xy
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Old 10th September 2019, 06:25 AM   #172
superlian is offline superlian  Norway
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Nice

What is the cutoff?


Autotechs Tractrix 1000 is 12 cm wide: TRACTRIX-1000 - Horns by Auto-Tech

And JMLC 2000 10 cm: http://horns-diy.pl/en/horns/jmlc/jmlc-2000/


I think it is better with a much smaller horn and a cutoff around 5000

Ale have very small horn: http://soundgate.net/product/NTE1.highend

Last edited by superlian; 10th September 2019 at 06:32 AM.
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Old 10th September 2019, 06:56 AM   #173
mabat is offline mabat  Czech Republic
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There is no such thing here - you can see radiation impedance has no sudden drop, what's usually called cutoff. If I ever wanted to make a very small horn for 5 kHz xover (to a bigger midrage horn I suppose - not a very good idea, but OK), I would do it the way I showed, maybe a bit smaller, this was just a quick attempt. You can easily try it smaller and see what would you get - this is what the tool is for.
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Old 10th September 2019, 07:05 PM   #174
454Casull is offline 454Casull  Canada
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Great work! Really interesting stuff.
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Old 11th September 2019, 01:09 AM   #175
natehansen66 is offline natehansen66  United States
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I'm probably just a complete command line dunce but I can't get this to work. I've followed the guide and this thread afaik. Created ath in the suggested dir, created the shortcut as described, have the output in the config file pointing to a new dir as suggested, and have "open with" set to notpad for the config file but am getting this. What am I doing wrong?
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Old 11th September 2019, 01:29 AM   #176
Patrick Bateman is offline Patrick Bateman  United States
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can you post "small.cfg" and I'll try it on my end?
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Old 11th September 2019, 05:42 AM   #177
mabat is offline mabat  Czech Republic
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Isn't that a 32bit PC? I think the program is compiled for 64bit by default. I will look how to compile for 32bit. Otherwise I have no idea.

Last edited by mabat; 11th September 2019 at 06:01 AM.
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Old 11th September 2019, 07:24 AM   #178
superlian is offline superlian  Norway
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Is it possible to simulate the response of a routed waveguide lik Sagarmatha Duo from Bastanis have?

Products

On a 1 inch baffle with a 1 inch hole then routed with a R 1inch round edge router bit?

85434M | 3/4 In. x 1 In. Carbide Tipped Roundover Bit | Bosch Power Tools

Last edited by superlian; 11th September 2019 at 07:30 AM.
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Old 11th September 2019, 08:41 AM   #179
mabat is offline mabat  Czech Republic
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It seems the program doesn't handle properly dimesions comparable to a throat diameter. I'll look at what the catch is. Anyway, this is the closest I could get. Besides the resonance (which is correctable in principle) it will beam at high frequencies. I'm not sure it's the right way to go...

- The program as it is now doesn't support radius as mouth termination.
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Last edited by mabat; 11th September 2019 at 09:00 AM.
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Old 11th September 2019, 09:06 AM   #180
mabat is offline mabat  Czech Republic
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Well, the beaming in this case is just a slightly worse than a typical 1" dome tweeter. Compression driver won't be as smooth but will have much higher efficiency. Maybe with some small driver like DE360 it could make a usable tweeter (instead of a 1" dome).

Last edited by mabat; 11th September 2019 at 09:08 AM.
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