Looking for a software to simulate top mids and tweeters

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Fabyo64

Member
Joined 2022
#1
Hi, is there any available program to design mid or tweeter horns?

I am interested in building top pieces to use them in a 2 or 3 way system. I am fond in building different bass enclosures with hornresp but i realized that using this program doesn't get me far with building tops. While you can get T/S parameters for midrange woofers i find it a bit odd to get low to no results for frequencies over 1khz.
Talking about tweeters you basically dont get any T/S parameters. I lack knowledge on this but my bet lies on insufficient acuracy in the tweeter range for those type of parameters. I really dont know honestly.

Is there any program that could work with only chamber resonances and wavefront simulations to get somewhat usable information on your chamber design? So instead of using an electromechanical approach i could try relying only on response characteristics of enclosures.

Afaik designing tweeters on hornresp bears no proper results.
 
#2
Because in mids and tweeters you try to avoid using the part of the band that has a resonance. All or most of the T/S parameters are around dimensioning the behaviour of a driver on and below Fs - for bass drivers. You absolutely don't want to do this with a mid or tweet i.e. you don't want to use a mid or tweet so low that its resonance frequency is triggered. Most serious tweeter manufactures do supply T/S.

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#3
FYI/FWIW: Historically, tweeters are sealed back with a Qt = ~1.0, though seen a few over the decades with down to ~0.7, so nothing for T/S theory since it peters out at the driver's effective upper mass corner [Fhm].

Of those drivers that can be simmed, HR will sim the BW out to 20 kHz based solely on its inductance when using the 'directivity'/'response' tool.

Fhm = 2*Fs/Qts'

[Qts']: [Qts] + any added series resistance [Rs]: http://www.mh-audio.nl/Calculators/newqts.html
 
#4
Well afaik there are mid horns that go up to 2khz. I had the interest to build a midhorn that plays up to about 4 khz and design a tweeter horn with a high crossover for the best clarity.

I realized that hornresp does not give me the tools i would need to design this, especially becaues it calculates with impendance. I lack experience and knowledge to design this by hand. So i try to get into other programs. Are there really any programs out there for designgn tweeter horns?
 
#5
TNT said:
Because in mids and tweeters you try to avoid using the part of the band that has a resonance. All or most of the T/S parameters are around dimensioning the behaviour of a driver on and below Fs - for bass drivers. You absolutely don't want to do this with a mid or tweet i.e. you don't want to use a mid or tweet so low that its resonance frequency is triggered. Most serious tweeter manufactures do supply T/S.

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Click to expand...
I dont want to design resonating chambers around their fs when considering mid speakers and tweeters. Much more i want to resonate at higher frequencies, or lets say broadband resonances with not too many refelctions inside its chamber. A smaller speaker should work up to 4khz, which hornresp fails to simulate in a closed baffle.
 
#7
Fabyo64 said:
Afaik designing tweeters on hornresp bears no proper results.
Click to expand...
As far as i know once the wavelengths get small (or horn throat and diaphragms get big compared to wavelengths) it all very much depends on diaphragm/phaseplug/throat/wavefront geometry, so simplified models don't match well. Maybe you need to look into here:
https://www.diyaudio.com/community/threads/akabak-3.353871/Still, you will not be able to simulate diaphragm/wavefront behaviour exactly.
 
#8
Fabyo64 said:
I dont want to design resonating chambers around their fs when considering mid speakers and tweeters. Much more i want to resonate at higher frequencies, or lets say broadband resonances with not too many refelctions inside its chamber. A smaller speaker should work up to 4khz, which hornresp fails to simulate in a closed baffle.
Click to expand...
So then you dont need T/S parameters because they are only at play at resonance.

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#10
GM said:
What's the horn's low corner? What size driver you wanting?
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I thought about something funny and interesting. Initially i wanted to build a synergy horn until i realized into how much work i will potentailly get. Then i changed my mind on building a midspeaker that has a 6th order compound horn. One side should be loaded for 100 hz and upwards and the other horn for maybe 2khz or so... depending on what kind of results i get ofc. Afaik speakers above 12 inch get too troublesome for khz frequencies so i try to stick around 10 or 12 inch. Both chambers need to be broad in their frequency response which maybe goes for better soundquality anyway..
 
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