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Old 27th September 2007, 09:38 AM   #621
Buzzy is offline Buzzy  Singapore
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Thanks JanFredholm. I understand S1 to S4. But from my understanding the L12 is the axial length of horn. So i think it should start at the mid point of S1 and go to the midpoint of S2. Is this right ? Correct me if i am wrong .
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Old 27th September 2007, 01:11 PM   #622
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Hi Buzzy,


look at page 15 in "Help" files for Hornresp.
Begun to edit the default horn and name it and take away the old values and make a tapped horn.

in "HELP " it says wery clear that L12 is measured from closed hornthroat to center of driver diapraghm ,thoat side.

It also says that L23 is the lenght of the horn ,measured between throatside of diapraghm to the mouthside of diapraghm.

It also says that L34 is the lenght between center of mouthside of diapraghmand the horn mouth.

As in my "fast" planīs and others more refined schematicīs

Just do as it says in "Help" .
Make a "tryout" so you can learn the program by doing better and better curves, as you can see in "SPL response".under "window".

you can put alot of "0" below the values for the driver.
And you must put a larger value on s2 than s1 and a larger value on s4 thans3. then you can double click on the L12,23,34 and the program helps you. and when you have put in values where the program ask for it you have a "tools" box with a "tapped horn wizard" that make everything for you at a start.

good luck/ J
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Old 27th September 2007, 05:15 PM   #623
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Quote:
And you must put a larger value on s2 than s1 and a larger value on s4 thans3.
Till very recently you were absolutely right, just to make things more complicated: This is a screenshot made with Hornresp 16.40

Click the image to open in full size.

Wkr Johan
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Old 2nd October 2007, 08:23 PM   #624
tommysb is offline tommysb  United Kingdom
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Default Higher Frequencies?

Does it make sense to use a tapped horn for higher frequencies? I can simulate to get about 102dB (2.83V) out of a small horn in the range 90-300Hz.

Here's the script I used:

| Based on 30 Hz Tapped Horn (script adapted from William Cowan's Website, http://diy.cowanaudio.com/)

Def_Const |Horn Dimensions

{
a1 = 230e-4; |Area at throat (cm^2)
a2 = 240e-4; |Area at rear of driver (cm^2)
a3 = 800e-4; |Area at front of driver (cm^2)
a4 = 900e-4; |Area at mouth (cm^2)
l1 = 10e-2; |Distance from throat to rear of driver (cm)
l2 = 90e-2; |Line distance from rear of driver to front of driver (cm)
l3 = 10e-2; |Distance from front of driver to mouth (cm)
}

Def_Driver 'Dr1'

| 18sound 10MB400

Sd=350cm2
fs=70Hz
Qes=0.37
Qms=3.5
Vas=41L
Re=5.1ohm
Le=1.05mH

system 'S1'

Driver Def='Dr1' Node=1=0=3=4
Waveguide 'W1' Node=2=3 STh={a1} SMo={a2} Len={l1} Conical
Waveguide 'W2' Node=3=4 STh={a2} SMo={a3} Len={l2} Conical
Horn 'H1' Node=4 STh={a3} SMo={a4} Len={l3} Conical




Any help appreciated! Cheers!
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Old 3rd October 2007, 05:18 AM   #625
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I considered putting a midrange in a tapped horn for my Unity clones. I can't see why it wouldn't work. I opted for bandpass mids instead of tapped horn mids because the mouth of the tapped horn was too big.
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Old 4th October 2007, 10:01 AM   #626
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Once again, hornresp ist updatet. Thanx

@david
BTW, what did you improve this time?
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Old 4th October 2007, 03:41 PM   #627
AndrewT is offline AndrewT  Scotland
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Quote:
Originally posted by Patrick Bateman
I considered putting a midrange in a tapped horn for my Unity clones. I can't see why it wouldn't work. I opted for bandpass mids instead of tapped horn mids because the mouth of the tapped horn was too big.
Hi Patrick,
please explain, were you fitting a mid driver to the bass horn or a separate mid horn with dedicated mid driver?
If mid driver to mid horn then the mouth should be roughly the same as the mid Sd or upto twice Sd.
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Old 4th October 2007, 11:07 PM   #628
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Location: San Diego
Quote:
Originally posted by AndrewT

Hi Patrick,
please explain, were you fitting a mid driver to the bass horn or a separate mid horn with dedicated mid driver?
If mid driver to mid horn then the mouth should be roughly the same as the mid Sd or upto twice Sd.
This was a unity horn -
In a Unity horn the mids are basically in a bandpass enclosure which is coupled to the rest of the horn. To complicate matters further, they are NOT located at the apex of the horn! Confusing huh?

Only way to model a Unity horn is with Akabak. I've never seen anyone post an Akabak model though. Back when I was doing my Unity, I hadn't discovered Akabak. If I had six months to myself, I'd love to create a Unity horn model. That would be a heck of a project!
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Old 5th October 2007, 06:57 AM   #629
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Quote:
Originally posted by Sabbelbacke
Once again, hornresp ist updatet. Thanx

@david
BTW, what did you improve this time?
Hi Sabbelbacke,

Version 16.40 allows mass-loaded horns and negative conical flares to be modelled. Note 6 on page 15 of the Help file refers.

Kind regards,

David
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Old 7th October 2007, 03:12 PM   #630
freddi is offline freddi  United States
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Hi David - - does that mean Hornresp 16.40 can now examine the following arrangement cases?

Best, Freddy
Click the image to open in full size.
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