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Old 20th March 2013, 01:14 PM   #711
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Originally Posted by techbiker View Post
Hey guys!

I just thought about a neat idea in the other foam core thread. Since vibrations appear to be one of the central issues of foam core, has anyone thought about damping vibrations with a liquid damper? You could possible apply it to the interior and exterior of the cornu.

DEI 050220 Boom Mat Spray-on : Amazon.com : Automotive

When I get around to making another set of cornu spiral horns, I will coat them with a spray like this. If anyone is making a set at the moment though, I encourage you to give this a try and report your findings! The main issue that we've discussed is that it might be petroleum-based and may dissolve the foam, although this spray appears to be mild.
I can't imagine how this stuff would work in this situation.
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Old 21st March 2013, 02:03 PM   #712
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Hi there!
Finally wired the cabinet and glued the back plate and everything seems to be ok!! Used an utp twisted pair like you suggested, and both wires go through the spiral after cutting some small notches on top of it. This way couldn't be easier!! I'm really happy with the result and did not need to drill a single hole.

Each cable measures around 1.2ohms, hope this is ok.
Thanks for all your help!! Hopefully the enclosure will be finished this week and ready to be lacquered! I'll keep posting some updates.

Kind regards,
Fran
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Old 21st March 2013, 02:42 PM   #713
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Nice work Fran, looking forward to the results.
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Old 21st March 2013, 04:42 PM   #714
prezden is offline prezden  Canada
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Looking good!
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Old 21st March 2013, 04:55 PM   #715
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Thank you both! It would be great to see some pictures of your cornus Prezden!
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Old 21st March 2013, 05:43 PM   #716
prezden is offline prezden  Canada
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Fransico-
The 2 that I have completed so far are on page 34 - post 332 and page 41 - post 405. I'm just starting work on another pair. Lots of fun making them and not much money involved
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Old 21st March 2013, 05:45 PM   #717
prezden is offline prezden  Canada
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Whoops- sorry I spelled your name wrong
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Old 21st March 2013, 06:08 PM   #718
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They look great !!!
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Old 22nd March 2013, 12:42 AM   #719
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Those do looks very nice. Just curious, what dimensions did you build these?
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Old 22nd March 2013, 07:49 AM   #720
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Thanks Zayne ,
middle plate is 75x75x1cm and front and back are 70x70x1cm baltic birch ply.
The spirals are made from okume plywood 4mm thick in strips of 14cm, so the entire speaker's depth is 16cm.
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