Hypothetically...would glass spheres or horns work? - diyAudio
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Old 2nd October 2006, 11:21 PM   #1
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Default Hypothetically...would glass spheres or horns work?

I'm in an art metal & glass class in school, and the instructor mentioned a way to take sheet glass, make it semi-flexible, and mould it into the desired shape.

So, why not a sphere or a horn?

Glass has some unusual resonant tendencies, but it would seem that this might be an effective way to make a spherical enclosure. (And spherical baffles are supposed to be ideal, right?)
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Old 2nd October 2006, 11:46 PM   #2
Jaime is offline Jaime  Uruguay
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For a long time I want to make a glass frontal horn.
I believe that plastic horns are ugly and made in wood they seem very voluminous.

The Ferguson Hill acrylic horns are diaphanous. But I think glass is better.

http://www.fergusonhill.co.uk/

Best regards Jaime
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Old 2nd October 2006, 11:46 PM   #3
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Hmm... a glass horn.

You would probably have to temper it for the strength and I think that would make it brittle. Hard to mount without stressing the flange and if you happen to turn it up and hit the glass' resonant frequency...

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Old 3rd October 2006, 12:28 AM   #4
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There are also glass boxed speakers....

to take full advantage you'd want to build a box with no damping.

A glass or plexi frugel-horn would be quite interesting.

dave
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Old 6th October 2006, 02:31 PM   #5
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Just run across this thread. Nice idea. French company Waterfall make 2 way floorstanders out of glass, and very nice they are too. Top of the range is the Victoria I believe.

Having removed the minimal damping I'd added to the bottom of the filter chamber of the Harvey double frugelhorns (they really don't need it), I can safely assert that these too, like the regular Frugelhorns, would be an excellent option in glass. Look spectacular too. Maybe some frosted internal panels with transparent outer? Great stuff.
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Old 6th October 2006, 09:39 PM   #6
stroop is offline stroop  Germany
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How thick do you reckon the plexiglass would have to be for the frugel horns or any audio application like that? 4mm be enough? Would look cool...

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Old 6th October 2006, 11:52 PM   #7
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Quote:
Originally posted by Scottmoose
Just run across this thread. Nice idea. French company Waterfall make 2 way floorstanders out of glass, and very nice they are too. Top of the range is the Victoria I believe.

Having removed the minimal damping I'd added to the bottom of the filter chamber of the Harvey double frugelhorns (they really don't need it), I can safely assert that these too, like the regular Frugelhorns, would be an excellent option in glass. Look spectacular too. Maybe some frosted internal panels with transparent outer? Great stuff.
You're going to have to link me to these.

Can anyone link me to a simple speaker that would work with glass? I'm okay at making things out of it, but I'm new to speaker building.
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Old 7th October 2006, 12:20 AM   #8
ronc is offline ronc  United States
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Natural glass in its basic form is not a good material for horns. It has very little damping properties and will have a resonance signature.
For front horns i still reccomend tar dampened steel as the resonating values are dampened by the tar and the high density of the steel provides the greater efficency due to impedance mismatch of the two mediums.

ron
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Old 7th October 2006, 08:08 AM   #9
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That's the fully WAF approved version Ron? Tar dampened steel? Now we're getting serious. Bet it sounds good.

I'm not sure about the glass -I still reckon (forgive me Ron -I take your points) that it could be made to work, if the type is carefully selected and some adjustments in the design were made to account for it's properties, but it would take someone with a lot more experience than me to figure it out.
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Old 9th October 2006, 10:46 AM   #10
Colin is offline Colin  United Kingdom
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The Waterfall speakers are here and Mark Audio makes a range of enclosures with acrylic.

There was a Wireless World article years ago which said that glass was an ideal material for sealed enclosures - something to do with resonance characteristics. However the author concluded it was too difficult to fabricate and went for ceramic instead.
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