Hornresp for Dum... hmm... Everyone ;) - Page 6 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #51 of 67 Old 02-03-12, 08:27 PM
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Re: Hornresp for Dum... hmm... Everyone ;)

Thanks Mark.

I tried setting Eg=0 and the SPL response curve looks much more reasonable now.

Tom
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post #52 of 67 Old 02-03-12, 08:41 PM
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Re: Hornresp for Dum... hmm... Everyone ;)

No problem.

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post #53 of 67 Old 02-11-12, 09:16 PM
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Re: Hornresp for Dum... hmm... Everyone ;)

Hi ... Does anyone know if this can be modeled in HornResp? The rear chamber is sealed and the throat is in front of woofer. More pictures are here ... http://www.decware.com/ImperialSO.htm
I'm short a few grand to buy the original speakers and will need to find suitable replacements as well as model the woofers I have. The Karlson type slot might make the whole thing impossible.

Thanks, Zene

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post #54 of 67 Old 05-01-13, 07:46 AM
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Talking Re: Hornresp for Dum... hmm... Everyone ;)

Quote:
mwmkravchenko wrote: View Post
In the Eg field enter 0 volts.

That will allow you to model a perfect driver on your horn . Since your driver has no true physical parameters. I have been doing similar work with planars.

Thanks Mark.
I tried setting Eg=0 also, the SPL response curve looks flater than before at high fre. range.
But why? Eg=0 got such kind of change.


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post #55 of 67 Old 05-23-13, 04:18 AM
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Re: Hornresp for Dum... hmm... Everyone ;)

may be i am stupid but rreally i dont understand...
anybody can help me?

please explain on the sketch
where is the
s1
s2
s3
s4
s5

and

L12
L23
L34
L45

and

VRC
LRC
VTC
ATC
?????????????????????

thank you....
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post #56 of 67 Old 05-23-13, 04:20 AM
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Re: Hornresp for Dum... hmm... Everyone ;)

may be i am stupid but rreally i dont understand...
anybody can help me?

[CENTER]

please explain on the sketch
where is the
s1
s2
s3
s4
s5

and

L12
L23
L34
L45

and

VRC
LRC
VTC
ATC
?????????????????????

thank you....
mash is offline  
post #57 of 67 Old 05-23-13, 04:23 AM
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Re: Rear Loaded Horns

Quote:
soho54 wrote: View Post
A Rear Loaded Horn is simply a Normal horn with no Rear Chamber. Really that is all it is. Instead of a Rear Chamber the driver is mounted externally, and you get the sum of the horn and drivers response.

To build one you do the exact same things as the Normal Horn builds (Simple or Advanced,) and just leave the Rear Chamber off. You must then use the Combined Response Graph to get the true FR.


Note: Here I am using the cheat to allow the use of a single segment horn in the Loudspeaker Wizard.
may be i am stupid but rreally i dont understand...
anybody can help me?

please explain on the sketch
where is the
s1
s2
s3
s4
s5

and

L12
L23
L34
L45

and

VRC
LRC
VTC
ATC
?????????????????????

thank you....
mash is offline  
post #58 of 67 Old 05-23-13, 10:16 AM
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Re: Hornresp for Dum... hmm... Everyone ;)

Your answers will be found here:

http://www.hometheatershack.com/foru...tml#post324333

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post #59 of 67 Old 04-16-14, 08:07 AM
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Re: Hornresp for Dum... hmm... Everyone ;)

Hello Soho54, Your tutorial was and is very helpful, thank you.
I would like to build an offset driver horn with one or two B&C 15NW76 drivers.
You wrote : As the driver is not at the throat, soundwaves are sent up and down the horn at the same time. This leads to cancellation issues above a frequency set by the round trip distance from the driver to the throat, and back to the driver. The longer the distance the lower the cancellation occurs.
If I understand correctly, the shorter the distance between driver and throat, the higher the frequency where cancellations occur.
After modelling an OD horn 380 cm long, it's SPL has some ripples. Could I space a second offset driver at 1/4 wave distance from the first to compensate for major dips or would it make problems worse ?
I don't want to use a back chamber but let it radiate free to air.
Thanks a lot, Marc
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post #60 of 67 Old 04-16-14, 09:49 AM
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Re: Hornresp for Dum... hmm... Everyone ;)

Quote:
After modelling an OD horn 380 cm long, it's SPL has some ripples. Could I space a second offset driver at 1/4 wave distance from the first to compensate for major dips or would it make problems worse ?
I don't want to use a back chamber but let it radiate free to air.
Thanks a lot, Marc
Don't know if Soho is active.

Your hopping for a filler driver effect if I'm thinking the way your thinking.

The greatest problem is this. There is no way to simulate this in Hornresp, and it will effectively not do what you want in the first place.

Drivers that are within a 1/2 wavelength of the frequency you are hopping to fill in will behave like a compound driver. In other words spacing them next to each other in acoustical terms.

That is why Hornresp is so successful in modeling systems. It treats multiple drivers as a lumped driver having the surface area of the combination.

As for ripple.

You will not hear ripples in use. Room response is definitely not flat, and music tends to mask most of the ripple effects up to about plus or minus 5db. Tests tones played a semitone intervals will to the trained ear display differences. But this generally occurs at differences greater than 3 db.

To get a handle on this the vertical divisions in Hornresp are 5db increments. Plus or minus 2.5db. If you are within this, from personal experience having built many enclosures. Don't worry man!

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