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Multi-Way Conventional loudspeakers with crossovers

Unity Horn Designs
Unity Horn Designs
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Old 7th January 2004, 04:35 PM   #1
Sheldon is offline Sheldon  United States
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Default Unity Horn Designs

The Uhity design has some interesting features. It seems like something that the more sophisticated DIY'ers would want to play with. But there is only a smattering of activity that I can find. Are any plans available, or do patent issues prevent this? Are appropriate drivers available? I'll ask on the Lambda site too.

Sheldon
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Old 8th January 2004, 10:51 AM   #2
Centauri is offline Centauri  Australia
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Sheldon,

Check out the High Efficiency section of http://www.audioasylum.com/index.html - Tom posts here quite a lot and has explained a lot of the workings of this design without being overly specific. Enough to wet the appetite !

Cheers
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Old 8th January 2004, 03:33 PM   #3
Sheldon is offline Sheldon  United States
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Thanks,

I have browsed there. I'm intrigued by the design, but I don't have the background to dive in without some more specifics. It would take me a long time to learn by trial and error, what must already be known.

Sheldon
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Old 8th January 2004, 05:12 PM   #4
mefistofelez is offline mefistofelez
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Hello Sheldon,

I have been collecting information on the Unity design for a while.

If you are dead serious about practical implementation and have a woodworknig capability, send me a p.m., and we can get together.

M
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Old 8th January 2004, 09:24 PM   #5
Sheldon is offline Sheldon  United States
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Quote:
Originally posted by mefistofelez

I have been collecting information on the Unity design for a while.

If you are dead serious about practical implementation and have a woodworknig capability, send me a p.m., and we can get together.

M
I don't know if I'm "dead" serious, but it's something I am seriously considering. I'm looking to make a very high quality speaker. The routes I'm narrowing in on include a widerange on an open baffle, with OB woofers, a Unity type with OB woofers, or perhaps something like an Oris horn with OB woofers. All three systems should be capable of a very coherent presentation. From what I've been able to read the Unity looks like it might be able to also deliver the dynamics of a good high eff. horn, in a relatively modest sized package. I have a very nice PP tube amp that would work fine for the Unity or OB options. Not sure I want to go the flea-power route with the large Oris type horns.

I can do the woodwork and I'm willing to play with the crossovers, but I don't want to have the entire design up in the air. So, if the horn design and driver selection can be reasonably spec.'d, and someone can report great results with same, I'd be willing to take a shot at it.

You're personal e-mail is disabled for this site.

Sheldon
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Old 8th January 2004, 11:33 PM   #6
hancock is offline hancock
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Check out www.yorkville.com ... hard to beet the price doing it yourself.

John
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Old 9th January 2004, 04:00 PM   #7
Sheldon is offline Sheldon  United States
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Quote:
Originally posted by hancock
Check out www.yorkville.com ... hard to beet the price doing it yourself.

John
Beating the price is not necessarily the primary objective. There may have been design compromises made for this product which would make it less than ideal for home hi fi. I don't know that that is the case, but there seems to be little to go on in this design area. I do know that I would want something that looks different. It's not obvious that component parts are available for this unit. That's why I was trying to find some DIY'ers that have some knowledge of the Unity.

Sheldon
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Old 9th January 2004, 04:52 PM   #8
LineSource is offline LineSource  United States
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Default Mathematics behind Unity Horn

Could someone post the mathematics behind designing a Unity Horn? I would like to experiment with a 2-way horn that extends lower than today's 300 Hz designs.

Equations for horn geometry. options...is 60x60 best?
Equations for throat hole sizes and positions.
Equations for optimizing T/S parameters of speakers.
Circular vs. rectangular horn.
Crossover design considerations in horn environment.
etc...
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Old 10th January 2004, 06:51 AM   #9
Centauri is offline Centauri  Australia
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Quote:
Could someone post the mathematics behind designing a Unity Horn?
From what I have been able to deduce from Tom's posts, the mathematics of this arrangement are still not fully understood - a lot of the design process has been fully experimental.

I would suggest that this would be the only way to diy this design as yet.

Cheers
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Old 10th January 2004, 07:30 AM   #10
paulspencer is offline paulspencer  Australia
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I have seen a great unity clone DIY project by John Sheerin:

unity horn clone

I have looked for unity horn stuff as I was interested in doing one myself at one time.

Browsing through the site at his other horn designs as well will give you an idea of the difficultly in getting a flat response.
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