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Topic: Repace the foam rubber on the Black Widow magnet? |
Bill Moore
From:
Manchester, Michigan
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Posted 19 Jun 2008 6:30 pm |
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I have two LTD 400 amps with the old style spider web Black Widow speaker. One of them had developed an intermittent distortion problem, I removed the magnet and found the black foam had deteriorated, and some of the powder had hardened into a black glob on the voice coil. I cleaned it up, now the amp works fine. Took the other one apart and found the same condition. The question; is it good idea to replace the foam? Or just leave it the way it is? The wire screen is still in place on both of the speakers.
_________________
Bill Moore...
my steel guitar web page
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Dennis Wallis
From:
Arkansas
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Posted 19 Jun 2008 9:23 pm
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| I used a microphone windscreen (foam rubber) to make a replacement for one. I think it is on there for a reason ; to keep out particles from getting into the voice coil gap. Not much trouble to make one. |
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Jim Bob Sedgwick
From:
Clinton, Missouri USA
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Posted 20 Jun 2008 5:58 pm
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| For you guys who have the "powdered foam problem". Rubbing alcohol and a q tip will remove the gunk, cleanly and quickly. FYI |
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Jerry Overstreet
From:
Louisville Ky
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Posted 21 Jun 2008 6:17 am
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I've performed this procedure on numerous spider webs over the years. I still have a few of them around. Never bothered to replace the foam.
Wouldn't want to have to do it all over again.
I don't believe the later magnets used this foam plug either. So far, no ill results from leaving the screen open on any of my BW's.
If you feel the need to cover the screen, you might try a small piece of loose knit, light fabric over the outside of the screen so that it wouldn't fall inside. JMO. |
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Ken Fox
From:
Nashville GA USA
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Posted 22 Jun 2008 6:07 am
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| I have some black Ozite material that Peavey used on speaker cabinets. Often you will see it in gray as well. It is like a very thick felt material (felt works as well). I cut it and glue it inside on the edges. When desperate I do have a lot of foam from reverb tanks (the packing block). I figure it is good for another 20 years!! |
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Richard Sinkler
From:
aka: Rusty Strings -- Missoula, Montana
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Posted 22 Jun 2008 8:24 am
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What are the symptoms of this problem? Is the foam actually necessary?
I don't want to open my speakers up to check. Might not get them back together or screw something up. |
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Ken Fox
From:
Nashville GA USA
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Posted 22 Jun 2008 8:47 am
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The foam particles get into the voice coil gap and cause the speaker to rub. The sound will be distorted.
I had one in an old Artist amp that was so bad the foam had melted and glued the voice coil to the gap! It was still trying to work but could not move!!!! |
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