Gadget13769
Joined: 12/01/11
Posts: 105
Loc: West Midlands
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New acoustic panels - air gap or no?...
#1021365 - 29/11/12 12:01 PM
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I have two new fibreglass panels (1150mm x 575mm x 50mm) to go on my back wall... ... so, following on from recent discussions elsewhere on the subject, will I see any
real benefit from spacing the panels with a 50mm air gap from the wall? Or will
this be so subtle in this case as that I might as well just fit them flush? Discuss... 
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Gadget13769
Joined: 12/01/11
Posts: 105
Loc: West Midlands
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Re: New acoustic panels - air gap or no?...
[Re: Gadget13769]
#1021366 - 29/11/12 12:08 PM
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Here they are... 
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Hugh Robjohns
SOS Technical Editor
Joined: 25/07/03
Posts: 18348
Loc: Worcestershire
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Re: New acoustic panels - air gap or no?...
[Re: Gadget13769]
#1021369 - 29/11/12 12:34 PM
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Spacing them from the wall will extend the absorption to a lower frequency and it is worth
doing if you can.
hugh
--------------------
Technical Editor, Sound On Sound
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GIK Acoustics
Joined: 05/09/12
Posts: 85
Loc: Atlanta, GA & Bradford, UK
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Re: New acoustic panels - air gap or no?...
[Re: Hugh Robjohns]
#1021484 - 30/11/12 04:50 AM
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Quote Hugh Robjohns:
Spacing them
from the wall will extend the absorption to a lower frequency and it is worth doing if you
can.
hugh
+1.
Though, two panels likely won't make a massive difference in the room. I would certainly
suggest enough to hit the reflection points as well as some corner bass traps, and if its
necessary, add from there.
--------------------
Alexander Reynolds
GIK Acoustics USA (770) 986 2789 | GIK Acoustics Europe +44 (0) 20 7558 8976 (UK)
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Gadget13769
Joined: 12/01/11
Posts: 105
Loc: West Midlands
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Re: New acoustic panels - air gap or no?...
[Re: GIK Acoustics]
#1021498 - 30/11/12 09:32 AM
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Quote GIK Acoustics:
+1. Though,
two panels likely won't make a massive difference in the room. I would certainly suggest
enough to hit the reflection points as well as some corner bass traps, and if its
necessary, add from there.
Indeed.
I already have two corner chunks to go in the back corners, two
panels for the back side wall, two panels for left/right reflection points, two larger
front corner chunks and a large ceiling cloud.
I'm also going to get a couple
more panels to go behind the monitor speakers, a panel on the back angle of my console and
possibly an angled panel between the front wall and ceiling.
This is the front
of my room so far...
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sheggs
Joined: 16/12/08
Posts: 88
Loc: Bradford, UK
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Re: New acoustic panels - air gap or no?...
[Re: Gadget13769]
#1021552 - 30/11/12 12:25 PM
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Looking Good 
-------------------- David Shevyn General Manager GIK Acoustics Europe
www.gikacoustics.co.uk
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Gadget13769
Joined: 12/01/11
Posts: 105
Loc: West Midlands
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Re: New acoustic panels - air gap or no?...
[Re: sheggs]
#1023069 - 07/12/12 06:32 PM
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Quote sheggs:
Looking Good
Thanks 
So, to slightly alter the question...
If I'm now using 100mm of space from
the wall (ie: 50mm panel + 50mm air gap), would I get better performance by just having a
100mm thick panel and no air gap?
(I realise 100mm panel + 100mm gap would be
even better, but 100mm total is pretty much the maximum I can afford to use in this small
room).
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Hugh Robjohns
SOS Technical Editor
Joined: 25/07/03
Posts: 18348
Loc: Worcestershire
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Re: New acoustic panels - air gap or no?...
[Re: Gadget13769]
#1023073 - 07/12/12 06:46 PM
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Not really, and it would be a lot heavier and a lot more expensive.
H
--------------------
Technical Editor, Sound On Sound
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Gadget13769
Joined: 12/01/11
Posts: 105
Loc: West Midlands
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Re: New acoustic panels - air gap or no?...
[Re: Hugh Robjohns]
#1023075 - 07/12/12 06:56 PM
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Quote Hugh Robjohns:
Not really,
and it would be a lot heavier and a lot more expensive.
H
I can get the 100mm thick panels for about
1/3 more cost than for the 50mm, so the cost isn't prohibitive, but if there is no likely
performance gain, then perhaps I should go with 50mm panel + 50mm air, as you suggest.
The weight isn't too bad. The panels I am using are fibreglass surrounded by 2mm
MDF, so a 1150mm x 575mm x 50mm panel is only 3kg.
Edited by Gadget13769 (07/12/12 07:00 PM)
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GIK Acoustics
Joined: 05/09/12
Posts: 85
Loc: Atlanta, GA & Bradford, UK
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Re: New acoustic panels - air gap or no?...
[Re: Gadget13769]
#1023587 - 11/12/12 04:31 AM
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Sorry Hugh but I must disagree. There is a significant difference between a 2" panel with
a 2" gap and a 4" panel from what I've seen(especially in corners, for obvious reasons).
And fiberglass/mineral wool isn't all too heavy anyways . I recommend making 100mm thick panels as a minimum unless your goal is only to tame
reflections.
-------------------- Alexander Reynolds
GIK Acoustics USA (770) 986 2789 | GIK Acoustics Europe +44 (0) 20 7558 8976 (UK)
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Gadget13769
Joined: 12/01/11
Posts: 105
Loc: West Midlands
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Re: New acoustic panels - air gap or no?...
[Re: Gadget13769]
#1025487 - 21/12/12 06:35 PM
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*Update* I have ordered 100mm thick panels for the back wall. I have used my
50mm panels on the side walls, with a small air gap... http://www.4x12.com/side_panels.htmlI have also just put
up a new page about my folding door bass trap... http://www.4x12.com/door_trap.html
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RitchieM
Joined: 18/06/10
Posts: 228
Loc: Skelmersdale, Lancashire
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Re: New acoustic panels - air gap or no?...
[Re: Gadget13769]
#1025522 - 22/12/12 12:40 AM
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Wow!!!!! That room looks amazing! I wouldn't get anything done, just sit in it
with a sense of serenity and feeling of pride! I don't think I can step into my
own little box anymore, you have ruined me.  Ritchie
-------------------- Engineering Surveyor and Musician Pretty Vegas Northwest Function and Wedding Band
Wedding Band Blog
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