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Old 3rd November 2011, 01:57 PM   #2391
AndrewT is offline AndrewT  Scotland
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Location: Scottish Borders
why not?
What specifically gives the impression that passive filters will not have a filtering effect.

In my view, a properly loaded horn is more resistive that other loading types and thus should respond to normal passive filtering.

The more difficult part and this applies to all driver loadings is, what happens to the filtering as one moves the signal outside the passband of the speaker.
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Old 3rd November 2011, 03:21 PM   #2392
Jmmlc is offline Jmmlc  France
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Quote:
Originally Posted by dirkwright View Post
OK, but without such a simulation it remains unclear (without lots of experimenting) how horn loudspeakers respond to passive crossovers. I'm not sure they respond in the same way that direct radiators respond, for example. I also don't think I can model horns in other kinds of software that do allow for the effects of a passive crossover and other filter elements.
Hello Dirkwrigt,

From Hornresp you can export the impulse response of the horn you designed in .wav format then you can import it in another software to play with crossovers on that impulse response.

I use often (depending on the computer) either CoolEdit Pro or Adobe Audition to perform such simulation of a crossover on the horn response.

Best regards from Paris, France

Jean-Michel Le Cléac'h

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Old 3rd November 2011, 03:30 PM   #2393
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It's not really useful functionality in a software package. Reality will typically diverge from a model in some way to due to assumptions made in the model that aren't mirrored in the actual speaker. This is why you should measure the response and impedance of the finished speaker and then do crossover design using that data.
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Old 3rd November 2011, 07:47 PM   #2394
Zero D is offline Zero D  United Kingdom
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Quote:
Originally Posted by tb46

From the Help file: "...Moving the mouse pointer over an object or message on the input parameters window displays a context-sensitive explanatory note in the status bar panel at the bottom of the window."
Hi, funny how i missed that couldn't see the woods for the trees Thanks

@ David Mcbean

Hi as promised, my reply.

I've had a little more time to tinker, especially due to my experiments in here Obtaining TSP etc with limited data

I get it now, so for eg, Cms 0.0000768 m/N = 7.68E-05 which appears to denote 5 x leading Zero's. & inputting 0.0000768 worked just fine, so we can do that

Le etc are often listed under drivers TSP's, though i accept your statement about EMP's.

Quote:
If Rms is not given, it can be derived using the Calculate Parameter tool
Yes thanks i got it using the CPT, & i also found Pmax and Xmax from the SPL Response window

I did notice that the secondary comments displayed in green in the Help file, are shown in italics, but for me anyway, highlighting them with colour as in the inbuilt HF is beneficial.

The sliders are a Great asset

Regards
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Old 3rd November 2011, 09:12 PM   #2395
Mark Kravchenko --- www.kravchenko-audio.com
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The sliders rule!
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Old 4th November 2011, 06:20 AM   #2396
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Quote:
Originally Posted by dirkwright View Post
I also don't think I can model horns in other kinds of software that do allow for the effects of a passive crossover and other filter elements.
Hi dirkwright,

AkAbak and AJHorn allow for crossover filter elements to be included.

Kind regards,

David
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Old 4th November 2011, 07:19 AM   #2397
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Hi Zero D,

Quote:
Hi as promised, my reply.
Thanks for following through with your promise - not everyone does, these days :-).

Quote:
I've had a little more time to tinker, especially due to my experiments in here Obtaining TSP etc with limited data
An interesting exercise, it seems :-).

Quote:
I get it now, so for eg, Cms 0.0000768 m/N = 7.68E-05 which appears to denote 5 x leading Zero's.
In mathematical terms, E-05 represents the exponent, or power of 10, that 7.68 (the mantissa) needs to be multiplied by, to give the correct value.

7.68E-05 = 7.68 * 10 ^ -5 = 7.68 / 100000 = 0.0000768

Similarly, 7.68E+05 = 7.68 * 10 ^ 5 = 7.68 * 100000 = 768000

Input values in Hornresp are limited to eight characters. To display 0.0000768 would require nine characters - using scientific notation, only eight are required :-).

Quote:
The sliders are a Great asset
You have no idea how difficult it was for me to get the Hornresp Loudspeaker Wizard to work the way that it now does :-).

Kind regards,

David
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Old 4th November 2011, 07:30 AM   #2398
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Quote:
Originally Posted by mwmkravchenko View Post
The sliders rule!
Hi Mark,

As indicated in my post above, they weren't exactly the easiest thing to implement :-).

Still, I am very happy with how they finally ended up - I learnt a lot while working out how best to make them operate :-).

Kind regards,

David
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Old 4th November 2011, 08:50 AM   #2399
Zero D is offline Zero D  United Kingdom
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@ David McBean

Re - Obtaining TSP etc with limited data

Quote:
An interesting exercise, it seems
In more ways than one A bit frustrating though as some of the numbers appeared to contradict But after you just posted the following,

Quote:
Input values in Hornresp are limited to eight characters. To display 0.0000768 would require nine characters - using scientific notation, only eight are required
Bingo, that "could" be why ? I'll retry & see how it pans out now, but due to the 8 limitation entry it'll have to be with a different driver. Of course i realise that it's not an HR limitation per se, as HR isn't designed to model drivers such as that, AFAIK.

Re - Cms

After you kindly futher explained, if you don't mind, i found it easier to remember it like this.

7.68E-05 = The decimal place is moved 5 times away to the left

7.68E+05 = The decimal place is moved 5 times away to the right

Re - Sliders

Quote:
You have no idea how difficult it was for me to get the Hornresp Loudspeaker Wizard to work the way that it now does
You're right, i don't But i wish i did, if you know what i mean

Regards
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Old 5th November 2011, 05:53 AM   #2400
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Hi Zero D,

Quote:
In more ways than one A bit frustrating though as some of the numbers appeared to contradict
While not wishing to put a dampener on your endeavours, I suspect that what you are trying to do, cannot be done, unfortunately... :-(.

Quote:
Bingo, that "could" be why ? I'll retry & see how it pans out now, but due to the 8 limitation entry it'll have to be with a different driver. Of course i realise that it's not an HR limitation per se, as HR isn't designed to model drivers such as that, AFAIK.
Not sure that I understand :-).

If you are concerned that your calculated Cms value of 0.0002075 m/N cannot be entered into Hornresp, then don’t worry, as the rounded value of 2.08E-04 will be close enough.

Quote:
7.68E-05 = The decimal place is moved 5 times away to the left
7.68E+05 = The decimal place is moved 5 times away to the right
Exactly - now you've got it :-).

Quote:
You're right, i don't But i wish i did, if you know what i mean
Sometimes though, ignorance can be bliss :-).

Kind regards,

David
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