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Old 7th January 2004, 10:32 PM   #1
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Default Question of how to glue driver surround to casket...

Hope someone can give me some advice on which glue to use when glueing a rubber surround to a steel casket. I bought a pair of these audax 10inchers 89 and they have been laying in my closet since then... Well seems as if they've come unglued! It will probably be diffecult to get the voicecoil centered again as the cone is sagging somewhat. How important is this when using the driver in a subwoofer?

/Niclas

Here's a picture to illustrate my situation:
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Old 7th January 2004, 10:53 PM   #2
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Centering is quite important. But if the surround has only come loose in that one spot, you might be OK. Try gluing it back down with contact cement, then carefully push it through its excursion range (spacing your fingers equally around the cone for balance). See if it rubs. If not, then try it on some sine waves. If it does rub, you'll need to remove the dust cap and the surround, shim the voice coil, then reglue the surround.

With contact cement, the trick is to apply it to both surfaces, let it dry, and only then bring the surfaces together.
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Old 7th January 2004, 11:04 PM   #3
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Thanks SY

I'm afraid that the whole surround is loose. What do you mean by "shim the voice coil"?

/Niclas
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Old 7th January 2004, 11:06 PM   #4
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Default Kind of creepy if you ask me.

"Hope someone can give me some advice on which glue to use when glueing a rubber surround to a steel casket."

Why would you want to make a speaker enclosure out of a casket.............
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Old 7th January 2004, 11:10 PM   #5
karma is offline karma  Canada
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if you like them send them to a speaker shop have the spider
replaced and new surrounds. if thay have been siting on there
face the spider will be compressed it would he hard to center it
or the voice coil will bottom out.

i use rubber cemment to fix surrounds
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Old 7th January 2004, 11:12 PM   #6
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Default shimming

What this does is to mechanically force the coil to be centered. You take some shim stock, which is like foil of a known thickness (check with Audax on what the gap should be; shim stock is available from a variety of sources and can be plastic, brass, or steel) and insert it between the coil and magnet or pole piece. Usually, you'll use three or four pieces spaced around the coil so that the coil is forced to center. Then the surround is glued in place.

After it's dry, remove the shims and glue on a replacement dust cap. If Audax doesn't give you a gap size, then you can trial and error it by using thin shim stock and stacking it; IOW, if three or four stacks of two pieces each still doesn't immobilize the cone, go to three pieces. And so on. Hope this is clear- this is a tough one to describe without using my hands

To find shim stock, check with companies that supply machine shops.
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Old 7th January 2004, 11:16 PM   #7
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ya that will work to center it. will the spider come back from siting face down?
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Old 7th January 2004, 11:18 PM   #8
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in the closet face up or down?
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Old 8th January 2004, 03:47 AM   #9
Mark Kravchenko
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Default Shim stock

PAper is the cheapest type of shim stock. Business cards playing cards thick card board normal paper. They will all work out and they are cheap and easily available. You just need a way to measure them. Buy beg borrow a micrometer and go to it. Adventures in reconing are the beginning of great things.

Mark
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Old 8th January 2004, 06:27 AM   #10
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Default Re: Kind of creepy if you ask me.

Quote:
Originally posted by Fred Dieckmann
[BWhy would you want to make a speaker enclosure out of a casket............. [/B]
I'm planning on making my casket out of a Rushmore.
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