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Author Topic: Question about horn design  (Read 1144 times)

duane massey

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Question about horn design
« on: March 17, 2019, 01:49:29 pm »

In the design of a front-loaded horn (full-size, not vented or tapped horn) what part(s) of the design would be affected by the parameters of the chosen woofer?
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Duane Massey
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Chris Grimshaw

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Re: Question about horn design
« Reply #1 on: March 17, 2019, 04:31:19 pm »

It's important to note that very few bass horns are "full-size". Most end up with compromised mouth size, and rely on multiples working together to increase the mouth area enough to support a flat LF response.

With regards to your question, I'd say the answer is everything. You can't design a horn without a driver, and similarly you can't pick a random driver to go in a horn - you need to find something suitable for the task at hand.

Chris
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Ivan Beaver

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Re: Question about horn design
« Reply #2 on: March 17, 2019, 08:11:44 pm »

In the design of a front-loaded horn (full-size, not vented or tapped horn) what part(s) of the design would be affected by the parameters of the chosen woofer?
The answer has a lot to do with "What do you want the horn to do?"  and more.  Are you looking for simply gain-over a limited freq range.  Or do you want extension?

The cabinet and driver are selected to work together.

Everything is a compromise, and you are constantly trading one thing for another.

Depending on certain things, a "wimper" woofer could produce better results.



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duane massey

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Re: Question about horn design
« Reply #3 on: March 18, 2019, 02:12:20 am »

When we built this massive pair of 20hz horns in the 70's the designer didn't have a particular driver in mind, other than the size. The results were phenomenal, but I was not aware of the details behind his design. Built a few smaller ones in later years, based on his notes about the flare rate and the compression volume, but never really thought about the woofer itself.
How would the driver affect the flare rate? The volume of the compression unit? This is all just out of curiosity on my part, as I will undoubtedly never have the opportunity to build any more of these.
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Duane Massey
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duane massey

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Re: Question about horn design
« Reply #4 on: March 18, 2019, 02:27:52 am »

Pic of one of the horns
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Duane Massey
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John L Nobile

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Re: Question about horn design
« Reply #5 on: March 18, 2019, 10:19:36 am »

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Jeff Bankston

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Re: Question about horn design
« Reply #6 on: March 22, 2019, 01:53:09 am »

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Michael Thompson

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Re: Question about horn design
« Reply #7 on: March 22, 2019, 02:27:48 am »

In the design of a front-loaded horn (full-size, not vented or tapped horn) what part(s) of the design would be affected by the parameters of the chosen woofer?

You will probably find more in depth answers to topics like this at diyaudio.com.
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Dave Garoutte

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Re: Question about horn design
« Reply #8 on: March 22, 2019, 12:44:47 pm »

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Keith Broughton

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Re: Question about horn design
« Reply #9 on: March 23, 2019, 07:06:09 am »

Hornografic images.
Good one ;D
From my limited understanding of straight horn design, I would think that in low frequency applications, it's the back loading of the driver that has more impact on what driver parameters are required.
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Mal Brown

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Re: Question about horn design
« Reply #10 on: May 04, 2019, 01:37:56 pm »

Pic of one of the horns

Sweet!   I can see the mobile crowd lining up

Their semiís that is..

;-)
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Tim Weaver

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Re: Question about horn design
« Reply #11 on: May 05, 2019, 08:33:12 am »

Duane, is the designer the guy that built the Core audio cabinets? I can attest that those worked pretty well with a variety of drivers! lol I've run across several core systems being used for DJ rigs that are still pounding even after decades of club "maintenance". I've seen all sorts of crap woofers in these things. I know for a fact the triple 15 sub that is in the Jolly Fox in Huntsville had everything from 2225's all the way down to car audio subs.

I wish I had a warehouse somewhere that I could collect some of these weirdo club cabinets I've seen in my travels. Just for the S&G's.....
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duane massey

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Re: Question about horn design
« Reply #12 on: May 05, 2019, 10:46:31 pm »

Tim, I built (or supervised the construction of) all of the Core Systems subs. All were based on a design from Rick Wheeler, from our family company, Amphion Sound Systems. I still build these from time to time. They were (and are) remarkably forgiving cabinets, in regards to the components that would work in them.
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Duane Massey
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Peter Morris

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Re: Question about horn design
« Reply #13 on: May 07, 2019, 01:18:48 am »

In the design of a front-loaded horn (full-size, not vented or tapped horn) what part(s) of the design would be affected by the parameters of the chosen woofer?

The 2 things that impact the most on how a driver of a given size behaves in a horn is the moving mass and the motor strength or BL product. Have a look at Hornresp http://www.hornresp.net/

https://www.hometheatershack.com/forums/diy-subwoofers-general-discussion/36532-hornresp-dum-hmm-everyone.html
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