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Witch activated carbon is the right one for speaker use

 
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willem-57
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Joined: 18 Jul 2014
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Location: Netherlands

PostPosted: Wed May 27, 2015 1:13 pm    Post subject: Witch activated carbon is the right one for speaker use Reply with quote

As the topic says i wanna know witch activated carbon is the right one for bass damping of a loudspeaker. There are many brands and also different types of this material. I have already asked Norit, a big company who makes this stuff. I hope that their manager will call me back. Rolling Eyes
Here are site's about this matter: http://audiogeekzine.com/2012/06/guest-post-charcoal-based-low-frequency-absorption/ and http://www.hometoys.com/content.php?post_type=1725
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SaSi
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PostPosted: Thu May 28, 2015 4:07 pm    Post subject: Reply with quote

Granules, of irregular shape and porous surface. The ones looking like "rice" or small pellets are not good.
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willem-57
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Joined: 18 Jul 2014
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Location: Netherlands

PostPosted: Tue Jun 02, 2015 2:24 pm    Post subject: Reply with quote

Thx Sasi, i have found a dutch site where there is 1 kind of carbon that is also used for loudspeakers, it is the NORIT GCN 3070.
"A coconut shell based granular activated carbon typically used in applications such as cigarette filters, cabin air filters and acoustic enhancement of loudspeakers".

Now find where i can buy this kind of carbon. Norit is a dutch company.

http://www.cabotcorp.com/solutions/products-plus/activated-carbon/granulated


Last edited by willem-57 on Wed Jun 03, 2015 6:08 am; edited 3 times in total
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willem-57
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Joined: 18 Jul 2014
Posts: 218
Location: Netherlands

PostPosted: Tue Jun 02, 2015 2:42 pm    Post subject: Reply with quote

I just called Norit/Cabot en they gave me a phone number of a company that delivers this particulair kind of carbon. Problem is that it are bags of 500 kilograms, but i need only 1 or 2 kilograms.
Wel that company will send me a sample of this stuff for free! Hope everything goes well.

Company website: http://www.brenntag.nl/prd/product/noritnl.php


Last edited by willem-57 on Wed Jun 03, 2015 6:08 am; edited 1 time in total
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SaSi
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PostPosted: Tue Jun 02, 2015 7:19 pm    Post subject: Reply with quote

And I thought that the locally available packing of 25kg was too much.
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willem-57
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Joined: 18 Jul 2014
Posts: 218
Location: Netherlands

PostPosted: Tue Jun 02, 2015 7:26 pm    Post subject: Reply with quote

SaSi wrote:
And I thought that the locally available packing of 25kg was too much.
Very Happy Very Happy Very Happy
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willem-57
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Joined: 18 Jul 2014
Posts: 218
Location: Netherlands

PostPosted: Wed Jun 03, 2015 9:07 am    Post subject: Reply with quote

Now i know witch carbon i must use, this goes back to: http://www.hifiloudspeakers.info/speakertalk/viewtopic.php?t=1585&start=150
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