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Old 14th May 2004, 12:01 AM   #1
Ropie is offline Ropie  United Kingdom
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Default Beauhorn Virtuoso clones?

Does anyone know of the whereabouts of any drawings/details of the innards of the Beauhorn Virtuoso Horn? Or similarly designed single driver horns (I've seen all the more well known Fostex designs)?

Thanks.
Ropie
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Old 14th May 2004, 01:57 AM   #2
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Default big and all fun horn project

Read both, mid page, great info http://melhuish.org/audio/rearhorn.html
you only need that short front horn for that driver, another driver most likely will not need it. But phase plug is always good. http://audioprogress.free.fr/
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Old 14th May 2004, 08:47 AM   #3
Ropie is offline Ropie  United Kingdom
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That's excellent, thanks.
Has anyone tried the big fun horn?
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Old 14th May 2004, 11:28 AM   #4
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Default Re: Beauhorn Virtuoso clones?

Konnichiwa,

Quote:
Originally posted by Ropie
Does anyone know of the whereabouts of any drawings/details of the innards of the Beauhorn Virtuoso Horn?
Yes, they are in Eric Thomas's locked Desk Drawer. The Virtuoso is a commercial product and hence the design is not available in the public domain.

The principle is quite easy, a 300Hz (appx.) fronthorn is coupled to a mostly straight appx 100Hz rear horn. Due to transmission line and corner loading the LF extends into the 50Hz region, the rear "horn" is around 1.5m or so long.

There is a small chamber behind the driver, then a channel bending forward above the front horn and slowly turning overtowards the rear with another turn whose exit is around teh middle of the depth of the cabinet. From there it's a mostly straightforward horn. All sound guides are made from polystyrene foam with smooth contures and much time was spend fiddeling with the exact horn conture.

Sayonara
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Old 14th May 2004, 01:26 PM   #5
Ropie is offline Ropie  United Kingdom
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Default Re: Re: Beauhorn Virtuoso clones?

Quote:
Originally posted by Kuei Yang Wang
Yes, they are in Eric Thomas's locked Desk Drawer. The Virtuoso is a commercial product and hence the design is not available in the public domain.
Yes, maybe I should have written, "Can anyone tell me what they think the inside of the BHV looks like?"

Thanks for the information; I have read your review of them and apart from anything else they are wonderful looking items. I just wondered if they were diyable, but the nearest documented project seems to be the All Fun Horn.
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Old 14th May 2004, 09:00 PM   #6
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I have not heard them. Post or search same question at these forums (lots of rearhorns) and you will get an answer http://www.AudioAsylum.com/forums/HUG/bbs.html http://f18.parsimony.net/forum31999/
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Old 15th May 2004, 10:51 AM   #7
Colin is offline Colin  United Kingdom
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There's a Big Fun Horn in progress on the fullrange forum at

http://f18.parsimony.net/forum31999/messages/68998.htm


Colin
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Old 15th May 2004, 01:21 PM   #8
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Default Re: Re: Re: Beauhorn Virtuoso clones?

Konnichiwa,

Quote:
Originally posted by Ropie
Yes, maybe I should have written, "Can anyone tell me what they think the inside of the BHV looks like?"
Actually, I looked inside, so I know....

Quote:
Originally posted by Ropie
I just wondered if they were diyable,
IN PRINCIPLE - Yes.

In practice, unless you are extremely experienced designing horns - no. The front Horn makes the System pretty flat 300Hz-12....18KHz from the front. You now need to design a rear horn that works from your lowest desired frequency and matches the gain of the fronthorn, basically you need 9 - 10db Horn Gain to around 300Hz and then tune the chamber behind the driver and it's exit to belnt the front and rear horn output together well. And you need to keep the rear horn short to avoid time delay problems.

Quote:
Originally posted by Ropie
but the nearest documented project seems to be the All Fun Horn.
The AFH looks rather different inside.

Sayonara
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Old 16th May 2004, 08:40 PM   #9
Colin is offline Colin  United Kingdom
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The Wireless World Dinsdale articles on horns had a 'mini-horn' which combined one driver and a front and back horn. Intended for corner use, it was nothing like the Virtuoso in appearance but may be out there on the web somewhere. The article gave a lot of details about balancing front and rear horns on a single driver. (The driver used was a 6.5 inch Eagle.)

Colin
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Old 17th October 2005, 12:09 AM   #10
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Default BFH in london

They are musically rewarding, although I would say system matching is a bit more critical than usual in my (limited) experience

If you are in london i could get you in touch with a friend of mine who has the big fun horns at home.

Wether he would be willing to let a complete stranger into his house is a different story....

I guess you would have to play your charms....

He is a really nice guy, btw
(So are many others here in the forum - T)

B
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