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Old 28th December 2015, 01:37 PM   #1
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Default FH3 with Lambwool as damping material

My FH3 speaker with MA Alpair 7 is almost finish and it is time to put the damping material inside the boxe before closing it with glue....
So, I buy Lamb's Wool (LAMB'S WOOL)
but now, I'm not so sure that it is a good idea because every body seem to put Acousca-stuf for damping in the FH3 speaker...

Behind the driver, I put 1/2 Natural Fibre inslation.

Lamb wool is a good idea or not?
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Old 28th December 2015, 08:01 PM   #2
Greg B is offline Greg B  United States
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I can't specifically address the FH3, but in general wool is a perfectly good damping material for pipe type speakers. In fact Acoustastuf was meant to imitate wool, IIRC.

The downside of wool is that moths and other critters like to eat it. That problem probably depends on your location to some degree.
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Old 28th December 2015, 08:10 PM   #3
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Lamb's wool should work fine in FH3. Amounts have not been calibrated yet thou, so while amounts should be similar to acoustastuff, no one knows yet.

As Greg mentioned, with wool you have to worry about moths and other insects that eat wool. It can be treated, but still a good idea to add a screen to keep them out.

Another issue is that wool tends to sag, so someway of keeping it in place will be needed. I used to mix it with some polyfluff to act to keep it in place. Eventually i just switched to using acoustastuff.

If you are buying the Visaton wool, are you importing it from Europe (which likely pushes the cost well above acoustastuff) or does Solen stock it?

dave
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Old 29th December 2015, 12:26 AM   #4
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I buy it from Solen...
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Old 29th December 2015, 12:28 AM   #5
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Solen likely has acoutastuff too.

dave
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Old 29th December 2015, 03:39 AM   #6
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Hoping to have a natural wool based damping material with consistent and specified absorption - specially created for speaker damping - ready for the DIY market some time late in 2016.

blakkshepeaudio
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Old 29th December 2015, 08:36 PM   #7
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This is the way I put the lamb wool!
I just try to copy what everybody does...
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Old 29th December 2015, 08:47 PM   #8
chrisb is offline chrisb  Canada
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Arnold - if you've not already buttoned up the second side, I'd try moving the front wad a bit lower down - to resting on the dowels
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Old 29th December 2015, 09:08 PM   #9
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You mean just moving down the material or you think it is better to add some to cover all the space between the driver and the dowels?
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Old 29th December 2015, 09:43 PM   #10
chrisb is offline chrisb  Canada
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I'd leave a bit of a gap immediately below the driver - the point behind the divider is stuffed with density gradually increasing to the sealed tip.
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