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Old 13th June 2010, 01:47 AM   #11
doug20 is offline doug20  United States
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Originally Posted by Ed LaFontaine View Post
Any of you gentlemen have leftovers?

My application is a pair of QSC 152 waveguides.
Do you have a build thread? I would love to follow since I have built a set of QSC 152 clones already but Im always looking to learn something.

I have used the 30 ppi foam from swisstropics.com (link just posted) but I can not seem to figure out what it really does to the sound or the measurements. I had limited luck with it.

I wonder what Geddes really uses??
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Old 13th June 2010, 02:08 PM   #12
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Geddes is in the greater Detroit area. I would speculate he uses a local source. He has graciously offered to sell some. However, my labor is cheaper than his.

I like the source JLH has posted. Thanks.
I'll look into making a plug from 2 pieces. One for the throat, beginning with a cube. The piece outside of that will be made from flat stock. I'll prepare templates for the x & y axis of the wg and remove material in "sections".
For retention of the pieces, I'll investigate copper wire inserted into the walls of the guide. I haven't determined the gauge or length yet (but my thoughts are ~24 gauge and 1/2" exposure). The wire will be bent over to serve as barbs, and be distributed around the guide.

For reference, here are other links.

Reticulated Foam - Stephenson & Lawyer - Foam Fabrication for Engineered Applications

RETICULATED FOAM SHEETS - H-O Products Corp.

Welcome to Foam Factory

Dryfast Foam, Outdoor Foams, Patio Furniture Custom Cushion Replacement, Hi-Flow Foam

Last edited by Ed LaFontaine; 13th June 2010 at 02:16 PM.
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Old 13th June 2010, 02:55 PM   #13
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Poret will NOT be shipping June 15-20. I need to get some in my hot little hands. I'll be ordering n.l.t. mid-day Monday.
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Old 14th June 2010, 04:59 PM   #14
doug20 is offline doug20  United States
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Cool, may I suggest buying a $10 electric knife to cut the foam. I posted in the other thread answering your question.
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Old 19th October 2010, 03:01 PM   #15
SimontY is offline SimontY  United Kingdom
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Has anyone in the UK reading this tried to source suitable foam? I'm not sure where I can find it.

Thanks,
Simon
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Old 10th September 2012, 07:24 PM   #16
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Anyone have any luck finding a 6" thick block of foam?

I'm having trouble imagining how I would hold three 2 inch thick layers together. I don't really want to have to put toothpicks in the path of my tweeter
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Old 10th September 2012, 08:25 PM   #17
Sheldon is offline Sheldon  United States
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Originally Posted by RockLeeEV View Post
I'm having trouble imagining how I would hold three 2 inch thick layers together. I don't really want to have to put toothpicks in the path of my tweeter
Get yourself some 3M Super 77 spray glue. A light spray on both sides to be bonded, dry for a few minutes (but still tacky), stick them together.

Sheldon
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Old 11th September 2012, 07:39 AM   #18
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Use thread and route it in & out of tiny holes drilled through the horn, looping around the foam to hold it. Tie it off behind the horn.
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