Mark6432
member
Joined: 06/06/05
Posts: 77
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Foam bass traps
#1015184 - 24/10/12 10:55 AM
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Are foam bass traps, such as these Foam bass traps - http://www.acoustic-foam.co.uk/products/AFBT02-Acoustic-Foam-Bass-Trap-Box
-of-2-Bass-Traps.html any good? I'd being using them in a 6x7ft
room along with DIY broadband absorbers and hi freq acoustic tiles.
-------------------- www.markwhitemusic.co.uk
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Daniel Davis
Joined: 10/03/06
Posts: 728
Loc: Edinburgh
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Re: Foam bass traps
[Re: Mark6432]
#1015208 - 24/10/12 11:53 AM
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There is nothing wrong with foam as a sound absorbing material, but the traps on that site
are not physically large enough to absorb low frequencies. They will contribute to some
absorption or the low-mids, which can be helpful, but won't fix your modal issues. 1ft trap longest dimention of thickness is 334mm 1/4 wavelength of
250Hz To be honest what you probably need is something that deals with all the
frequencies below 250Hz rather than the ones above it. Now a 2ft trap which
some companies do will go down to around 125Hz which is more useful, and a 1m trap down to
85Hz, now you're talking.
-------------------- Daniel Davis
Edinburgh Recording Studio Windmill Sound
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Mark6432
member
Joined: 06/06/05
Posts: 77
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Re: Foam bass traps
[Re: Daniel Davis]
#1015221 - 24/10/12 01:32 PM
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Hi Daniel, Thanks for the advice, some good succinct info. If I was
staying in the room long term (probably moving into garage in the summer) I'd build some
of those super chunk corner traps, not sure how to DIY them as non-fixed units. Would a
pair of the foam traps stacked (ie tow on each side) make for double the frequency
response down at the bottom end? I guess that way I could then add a third lot when I move
into the garage....or do I just sort out DIY approach and make some tall ones which I can
move? hmmm.decisions, decisions...
-------------------- www.markwhitemusic.co.uk
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Daniel Davis
Joined: 10/03/06
Posts: 728
Loc: Edinburgh
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Re: Foam bass traps
[Re: Mark6432]
#1015245 - 24/10/12 03:05 PM
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£40 per 2 traps for a few pence of foaming materials. humpf. That would buy
you a lot of rockwool, corning or other slab material. Another thread
recommended Rockwool RW3 Slab which is a UK alternative to Owens Corning.
-------------------- Daniel Davis
Edinburgh Recording Studio Windmill Sound
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Mark6432
member
Joined: 06/06/05
Posts: 77
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Re: Foam bass traps
[Re: Daniel Davis]
#1015255 - 24/10/12 03:53 PM
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Thanks again Daniel! I didn't realise you could buy 'slabs' of the stuff, which
presumably this is? I guess I can cut this into triangular towers, frame and wrap?
-------------------- www.markwhitemusic.co.uk
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Martin Walker
Watcher Of The Skies
Joined: 28/02/01
Posts: 16393
Loc: Cornwall, UK
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Re: Foam bass traps
[Re: Mark6432]
#1015284 - 24/10/12 07:14 PM
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Quote Mark6432:
Thanks again
Daniel!
I didn't realise you could buy 'slabs' of the stuff, which presumably
this is? I guess I can cut this into triangular towers, frame and wrap?
Hi Mark,
Yes, of course you can -
this 'superchunk' approach has been used for many years. Here's a DIY image showing the
wooden corner frame part-filled with rockwool:

Martin
-------------------- YewTreeMagic
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sheggs
Joined: 16/12/08
Posts: 88
Loc: Bradford, UK
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Re: Foam bass traps
[Re: Martin Walker]
#1015340 - 25/10/12 07:20 AM
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You don't have to use the slabs for corners though. Fluffy insulation will work just as
well, depth of the material is what is improtant here rather than just density
-------------------- David Shevyn General Manager GIK Acoustics Europe
www.gikacoustics.co.uk
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Mark6432
member
Joined: 06/06/05
Posts: 77
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Re: Foam bass traps
[Re: Mark6432]
#1015535 - 25/10/12 10:08 PM
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Thanks chaps, you're right about the DIY cost yielding more bang for the buck. I got on
and made a pair of superchunks today. Am going to do another pair tomorrow. Sadly my
wife's not as enthralled by my new found obsession as I am!
-------------------- www.markwhitemusic.co.uk
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Martin Walker
Watcher Of The Skies
Joined: 28/02/01
Posts: 16393
Loc: Cornwall, UK
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Re: Foam bass traps
[Re: Mark6432]
#1015804 - 27/10/12 12:37 PM
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She might change her mind once you cover the fronts in some fabric that tones in well with
the rest of the room decor  Martin
-------------------- YewTreeMagic
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