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12th May 2005
| #1 |
| Gear addict Join Date: Jan 2005 Location: Jersey
Posts: 465
Thread Starter  | DIY Broadband Absorbers (w/ 703) I am about to buy some O.C. 703. First off, I was wondering how thick I should buy (I was thinking 2 inches). Also, do you guys know of any DIY plans for 703 absorbers? Thanks in advance as always. - Bill
__________________ The painting was a gift Todd.......and I'm taking it with me. |
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12th May 2005
| #2 |
| Lives for gear  Join Date: Apr 2004 Location: Nashville, TN
Posts: 1,800
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12th May 2005
| #3 | |
| Gear addict Join Date: Jan 2005 Location: Jersey
Posts: 465
Thread Starter | Quote:
 I wanted opinions from some people on the board on plans they found worked well.. | |
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12th May 2005
| #4 |
| Lives for gear  Join Date: May 2005 Location: Oklahoma City
Posts: 1,783
| I've seen an absorber built from a "stack" of 1" of 701 facing into the room, with 2 pieces of 1" 703 behind that with another two pieces of 1" 705 at the rear. It's supposed to be better for broad band absorption. Bri |
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12th May 2005
| #5 |
| Lives for gear  Join Date: Mar 2004 Location: San Francisco, CA
Posts: 2,705
| I've built about 8 traps for my studio. The traps are 4 inches thick composed of 703 w/ FRK siding (2 x 2'' pieces sandwiched together). The FRK siding (looks like foil on one side) is supposed to have better absorption properties, but I haven't actually done any comparison tests between the normal 703 and FRK faced 703. I covered the two pieces in maroon burlap then "framed" them with stained wood planks. They look pretty sharp and cost me about $35 each. Placing the traps in the corners of my uninspiring rectangular (cringe) control room made a noticeable difference. Remember, all corners count: wall meets wall, wall meets ceiling, wall meets floor. I did some A/B sine sweep tests in the room both before absorption and after absorption. My sine sweep was played at about 85 db and captured by a fairly neutral omni mic, and only swept frequencies from 20hz - 500hz (seemed to be the biggest problem in my room). The traps did a great job of evening out the frequencies from around 150hz to 500hz, but did little to nothing below 150hz. I really just wish I had a bigger control room! Hope this helps! |
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12th May 2005
| #6 |
| Gear maniac  Join Date: Oct 2004 Location: Colorado
Posts: 175
| I built 25 or 30 for my studio, out of 2 layers of 2" rockwool. But you can still use the same construction: http://www.pmerecords.com/broadband.cfm -Craig |
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12th May 2005
| #7 |
| Gear nut  Join Date: Sep 2004 Location: Los Angeles
Posts: 112
| If you don't want to mess with fabric coverings, you can buy a version of 703 that is faced with a black "skin". It's Owens Corning "Select Sound". http://www.geocities.com/thatwascasey I made 16 of those. One layer of regular 2" 703 plus a top layer of 2" Select Sound. Framed with MDF. Placed at all corner juctions and first reflection poins, they absorb down to about 60 Hz. |
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12th May 2005
| #8 |
| Gear nut Join Date: Mar 2005 Location: Northeast U.S.
Posts: 138
| If you haven't been to http://forum.studiotips.com it's a valuable resource, also www.bobgolds.com |
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12th May 2005
| #9 |
| Gear nut  Join Date: Mar 2005 Location: Austin, Tejas
Posts: 117
| How much more is the "Select Sound" compared to normal 703? |
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