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29th September 2008
| #1 |
| Lives for gear  Join Date: Feb 2005 Location: India
Posts: 942
Thread Starter | Rockwool density Hi - I'm looking to build some broadband absorbers. Can anyone recommend the correct density of rockwool for the traps? Many thanks.  |
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29th September 2008
| #2 |
| Gear Guru  Join Date: Oct 2002 Location: New Milford, CT, USA
Posts: 12,050
|  For a 4-inch thick panel, anything between about 4 to 12 pcf should be fine. The thicker the panel, the less density you can get away with. What matters most is having enough bass traps, with the goal to cover as much corner surface as possible. --Ethan
__________________ Ethan's audio book is coming! |
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29th September 2008
| #3 |
| Lives for gear Join Date: Feb 2005 Location: India
Posts: 942
Thread Starter | Thanks so much, Ethan! |
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19th February 2009
| #4 |
| Lives for gear  Join Date: Dec 2007 Location: Wiltshire, UK
Posts: 637
  | I was going to ask this too. Ethan, what do you mean by 'pcf'? The most I know is that Sound On Sound just recommended 45kg/m3 to 60kg/m3 as the best density. I didn't realise the depth of the panel also affected this. As I write this I just got a quote from a builders merchant saying they have 50 and 60kg/m3 (hopefully not metres squared, didn't hear actually). I'll do a search as well, but please can you link me to these legendary 'build you own acoustics' articles? Didn't spot them on your realtraps site.
__________________ My blog: http://tomdavenport.co.uk |
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19th February 2009
| #5 |
| Gear interested Join Date: Aug 2008
Posts: 3
| Pounds per cubic foot. Multiply kg/m3 by 0.06 to get pcf. |
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19th February 2009
| #6 | |
| Gear Guru Join Date: Oct 2002 Location: New Milford, CT, USA
Posts: 12,050
| Quote:
--Ethan | |
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20th February 2009
| #7 |
| Gear Guru  Join Date: Jul 2005 Location: Atlanta, GA
Posts: 11,003
| Just to add you can cut the rockwool into 17"x17"x24" triangles and stack them floor to ceiling. If going that way stick with the 4 pound. Glenn
__________________ Glenn Kuras GIK Acoustics USA GIK Acoustics Europe 770 986 2789 (USA) +44 (0) 20 7558 8976 (UK) See the NEW Soffit Bass Trap  |
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