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Old 14th September 2011, 04:57 AM   #1
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Default Unity/Synergy horn

Is it possible to create a round conical Unity horn? My assumption is that the normal horns have square walls because it's easier to mount the mids. Is this correct?
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Old 14th September 2011, 06:16 AM   #2
Pallas is offline Pallas  Pakistan
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Originally Posted by 454Casull View Post
Is it possible to create a round conical Unity horn?
Yorkville Sound: Unity™

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Originally Posted by 454Casull View Post
My assumption is that the normal horns have square walls because it's easier to mount the mids. Is this correct?
No real knowledge to that point, but my guess is some combination of array ability and easier construction in small quantities (sheet materials rather than a molded part).
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Old 14th September 2011, 06:39 AM   #3
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Thanks, didn't know Yorkville made conical ones.

Since a conical horn is very close in shape to an OS waveguide, could an OS waveguide be designed with 2, 3, 4... side-entry mids like in a Unity horn? Perhaps a B&C DE5 or DE7 (smaller throat for higher cutoff with larger mouth) with two mids, two midbasses?

Last edited by 454Casull; 14th September 2011 at 06:47 AM.
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Old 14th September 2011, 07:27 AM   #4
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I recall Tom and others saying in the past that one advantage of the square horn is that pressures are lower in the corners. This helped reduce the HF's interaction with the midrange driver ports.
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Old 20th September 2011, 05:01 AM   #5
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Jason hit the nail on the head. That is the downside with the Yorkville Unity. From a DIY perspective, an axisymmetric is more difficult to build and even more so if you want a different aspect ratio.
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Old 20th September 2011, 05:36 AM   #6
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Quote:
Originally Posted by 454Casull View Post
Thanks, didn't know Yorkville made conical ones.

Since a conical horn is very close in shape to an OS waveguide, could an OS waveguide be designed with 2, 3, 4... side-entry mids like in a Unity horn? Perhaps a B&C DE5 or DE7 (smaller throat for higher cutoff with larger mouth) with two mids, two midbasses?
Most of my Unity horns were elliptical oblate spheroidal.

Check out my threads on audiogroupforum, diymobileaudio, and my own forum. (forum.audiopsychosis.com)

They worked fine for me, and I prefer EOS because it has a number of advantages:

#1 - EOS is less prone to the on-axis "hole" that plagues OS waveguides
#2 - EOS has less diffraction than a conical horn
#3 - For reasons that I'm too lazy to document here, Unity and Synergy horns work a lot better when the average coverage angle is narrow. IE, a 90x90 Unity horn won't work as well as a 60x45 Unity horn. My EOS waveguide was 108 degrees by 72 degrees IIRC
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Old 20th September 2011, 05:39 AM   #7
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I found that out as well with the sims, so built a 60 x 60 first. Now working on a 60 x 90 with 6 drivers and aiming to get down as low as I can, probably about 220 Hz.
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Old 10th June 2013, 10:40 AM   #8
tomtom is offline tomtom  Slovakia
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Originally Posted by Patrick Bateman View Post
Most of my Unity horns were elliptical oblate spheroidal.

#3 - For reasons that I'm too lazy to document here, Unity and Synergy horns work a lot better when the average coverage angle is narrow. IE, a 90x90 Unity horn won't work as well as a 60x45 Unity horn. My EOS waveguide was 108 degrees by 72 degrees IIRC

Isnt it that this make in reality more falling Powerresponse?

Please if you dont mind document the reasons
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Old 10th June 2013, 03:46 PM   #9
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Isnt it that this make in reality more falling Powerresponse?

Please if you dont mind document the reasons
I have a recent thread where I documented this extensively, with multiple sims.

Basically as the coverage angle of a horn grows larger and larger the output level falls. What may not be obvious is that the situation is exacerbated at low frequencies. (IE, output level falls, but it falls more at low frequencies than high)

Due to the loss of output at low frequencies, getting the mids to 'meet up' with the compression driver is more difficult with a wide angle horn than with a narrow angle horn.

It's easier to see this if you look at the sims I performed. I posted them about two months ago, but I can't recall the name of the thread. It was a thread that I started on this forum.
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Old 10th June 2013, 05:35 PM   #10
tomtom is offline tomtom  Slovakia
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many thanks i find it
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