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Multi-Way Conventional loudspeakers with crossovers

omnnidirectional synergy horn?
omnnidirectional synergy horn?
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Old 5th January 2015, 05:55 PM   #21
Flaesh is offline Flaesh  Russian Federation
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Using top-firing coax with conical refletor seems simply enough.
But less synergly .
AFAIK Tannoy Orbitus was the first.
Small firm in Moscow had made omny speakers with 15" RCF coax recently.
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Last edited by Flaesh; 5th January 2015 at 06:17 PM.
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Old 19th January 2015, 09:29 PM   #22
Flaesh is offline Flaesh  Russian Federation
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Have assembled quick dirty crazy 2way synomny prototype .
Will test it tomorrow..
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Old 20th January 2015, 01:35 AM   #23
Slothrop is offline Slothrop  United States
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I'm looking forward to that!
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Old 20th January 2015, 01:11 PM   #24
Slothrop is offline Slothrop  United States
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Quote:
Originally Posted by Patrick Bateman View Post
In an omnidirectional synergy horn, you can put the midrange and the compression driver face-to-face, like an oreo cookie.

That works better than what's pictured in post #1, as it allow you to get tighter spacing.
Patrick, thanks for your input. I've been trying to visualize your oreo cookie. Is this sketch anything like what you have in mind? I think I'd still like to use multiple small drivers, to get the crossover freq up above the voice band.
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Old 20th January 2015, 02:34 PM   #25
Flaesh is offline Flaesh  Russian Federation
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I do not have time yet.
Sectional view and hresp sim for woofer:
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File Type: jpg omnysynsect1.jpg (28.3 KB, 279 views)
File Type: jpg omnysynsect1_AP.jpg (22.0 KB, 270 views)
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Old 26th January 2015, 04:37 PM   #26
Patrick Bateman is offline Patrick Bateman  United States
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Post 24 and 25 will both work.
Post 24 will have issues with the vertical polars, because the walls aren't flat.
For a waveguide, you want flat walls.
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Old 11th April 2019, 02:09 PM   #27
Slothrop is offline Slothrop  United States
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My recent acquisition of a 3D printer has inspired me to take another look at this idea.

I made a drawing to show how I'm thinking about the form of the horn. This is based almost entirely on intuition.

I also made a CAD model of a possible implementation using a tweeter and woofer from an old Klipsch KG 4.5, and 4 Dayton Audio PC68 2-1/2" mids.

Any thoughts?
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File Type: jpg odmeh.jpg (117.0 KB, 152 views)
File Type: jpg horn06.JPG (523.6 KB, 151 views)
File Type: jpg oduh06x.JPG (50.5 KB, 86 views)
File Type: jpg oduh06a.JPG (51.6 KB, 69 views)
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Old 11th April 2019, 11:22 PM   #28
KCHANG is offline KCHANG  United States
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I understand that your goal is to build omnidirectional speakers, but I wonder whether you realize that what inspired you to go this direction is actually not omnidirectional. In post # 8 you showed your proto-type "omnidirectional speakers" that used Linaeum tweeters. Linaeum tweeters, however, are inherently dipolar. See, e.g., RadioShack Optimus Pro LX5 loudspeaker | Stereophile.com
So, is it possible that the kind of sound you are looking for is actually that of dipolar speakers?

Not sure if others have already pointed this out before, but my quick scan of the thread did not identify anything conspicuous on this point.

Last edited by KCHANG; 11th April 2019 at 11:25 PM.
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Old 12th April 2019, 01:21 AM   #29
Slothrop is offline Slothrop  United States
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@KCHANG - Thanks for your reply. The dipole-ness of the tweeters on my earlier speakers is what made me call them ‘half-assed’, i.e. not fully omnidirectional. Still, from 4kHz down they do a pretty good job of sending out 360 degrees of sound. I’ve heard dipoles, and this is not the same. I wish more people could get a chance to hear an omni speaker.
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Old 12th April 2019, 01:29 AM   #30
frangus is offline frangus  Australia
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Nice design and modelling!
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