Ok. So I've got a couple of my 2' X 4' panels done and I'm ready to mount them, but confusion sets in - Ethan Winer says to mount them 4" from the wall, but when I look at pics of other control rooms on the web, I see the side and rear wall absorbers are mounted flush to the wall.
So is it 4" for bass traps and flush for broadband?
My panels are made with 2" / 6# mineralwool in 2.5" frames. I already have bass traps in the front and rear corners, as well as a 3 panel cloud ala David French on the ceiling.
Thanks.
_________________ Bill Knipe
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Cubase 4 on PC, Tascam FW-1082, Real drum kit, Sampson drum mics, Line 6 Pod 2.0, Roland Blues Cube, KRK ST6, AT 3035,3032
Last edited by AwedOne on Thu May 08, 2008 11:23 pm; edited 1 time in total
patrick_like_static Recording Org Pro Audio Group
Joined: Sep 26, 2004
Posts: 421
Location: Springfield, Missouri, USA
I've read that 3" from the wall is a good compromise between floor space and acoustic control. And I believe this is true of the broadband absorbers, and that bass traps should have even more space behind them.
Let me know if you find out differently. I'm in the middle of building my own right now.
I expect Rod (et al) will correct me if I'm wrong, but essentially your understanding is correct... e.g.;
A narrower gap between the absorber and the wall decreases the frequency range of absorbtion in regards to the lowest frequencies absorbed.
As most rooms (assuming your mix environment) cannot have enough bass trapping, I would suggest that a 3"-4" gap would help more than a flush mount.
HOWEVER... Before just accepting random advice, I would ask you this; Have you done any testing to confirm if you have any specific needs for a particular frequency or frequencies to be dealt with?
If you have not already done one, I would suggest doing at least a waterfall and RT60. Post the results here, at John Sayers or Studio Tips
Don't get me wrong. You are probably just fine to go ahead. But, wouldn't you hate to go through all this trouble, only to find out you needed to hang the absorbers another inch further out AND needed to maybe build a set of Hemholtz Resonators?
An informed decision based on some scientific data is far more comforting, in my humble opinion, than a stab in the dark... not to mention the value of your work that you've obviously already done.
_________________ The insanity can be seen in bigger pix and greater detail at: http://www.dmmobile.com
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Codemonkey Recording Org Pro Audio Group
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Posts: 757
Location: Scotland, UK
"An informed decision based on some scientific data is far more comforting"
The Christian in me is screaming at that statement, but that's another point altogether.
I totally agree though, get some hard fast evidence before you drop cash on anything, especially something which would leave your mix room in tatters.
_________________ Curious button pushing Church sound guy.
In Soviet Russia, Phase Cancels You!
AwedOne Recording Org Pro Audio Group
Joined: Aug 12, 2007
Posts: 212
Location: Columbus, OH
I've already dropped a little bit of cash for mineralwool, burlap, wood for frames. My question wasn't whether or not I should take measurements of my room, that's a given (just waiting on my tax rebate to buy a good quality, fairly flat response omnidirectional mike).
I'm doing the standard bass trapping and broadband absorbtion recommended for very small rooms (15' X 10').
I was just curious why one bass trap company insists that a 4" air gap be used, while numerous pictures of control rooms on the web (some on competitors websites) show panels at the 1st and 2nd reflection points mounted flush to the wall. Now I understand that the gap can include the empty space of the frame not filled with material; i.e. 2" mineralwool in a 4" frame = 2" gap.
BTW, the improvement in clarity and stereo imaging from just the little I've done so far is AMAZING!
I'm looking at a matched pair of Shure KSM14's for drum overheads that might be useful in the omni configuration for room analysis. It's frequency response curve is fairly flat in the omni mode. Not quite as flat as the KSM44, but I need new overheads badly anyway. One guy told me I could get a dbx mic that goes with the Driverack units, for around $100USD. Anyone with experience with that mic that would know how flat it is?
Codemonky wrote:
Quote:
"An informed decision based on some scientific data is far more comforting"
The Christian in me is screaming at that statement, but that's another point altogether.
Yeah, I sometimes rely too much on my own intelect and that of others instead of just asking and trusting He'll give me the right answer.
_________________ Bill Knipe
------------------------------------------------------
Cubase 4 on PC, Tascam FW-1082, Real drum kit, Sampson drum mics, Line 6 Pod 2.0, Roland Blues Cube, KRK ST6, AT 3035,3032
Space Recording Org Pro Audio Group
Joined: Jun 26, 2007
Posts: 829
Location: Exit 4, Alabama
It's not the zero gravity so much that matters in relation to bass trapping. It is what sound can do when it gets in those areas. No more speculating, you can build a wall from sound!
I am practically beside myself even now and this was ten years ago!
AwedOne Recording Org Pro Audio Group
Joined: Aug 12, 2007
Posts: 212
Location: Columbus, OH
_________________ Bill Knipe
------------------------------------------------------
Cubase 4 on PC, Tascam FW-1082, Real drum kit, Sampson drum mics, Line 6 Pod 2.0, Roland Blues Cube, KRK ST6, AT 3035,3032
IIRs Recording Org Pro Audio Group
Joined: Oct 10, 2005
Posts: 450
Location: Sheffield, UK
"An informed decision based on some scientific data is far more comforting"
The Christian in me is screaming at that statement, but that's another point altogether.
Yeah, I sometimes rely too much on my own intelect and that of others instead of just asking and trusting He'll give me the right answer.
The atheist in me is confused by that statement. Are you suggesting we should pray for divine guidance on the subject of bass trapping?
Space Recording Org Pro Audio Group
Joined: Jun 26, 2007
Posts: 829
Location: Exit 4, Alabama
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