#1902308 - 03/03/08 03:00 AM
Ethan, oh oracle, your opinion on my diffusion scheme pls...
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Nolan Chiat
Senior Member
Registered: 06/06/07
Posts: 34
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Ethan,salutations from South Africa.
I hope you, the fam, Realtraps and Bear are absolutely splendid.
As always, I'd like to start by thanking you, yet again, for your legendary insight and generosity.
My question today pertains to the idea of having a combination of broadband absorption and diffusion on the wall behind my listening position. This is in my new control room.
My idea is to use 2 x broadband absorbers at the two first reflection points BEHIND my listening position.
The rest of that wall I thought to cover with broad bandwith DIY skyline diffusors (400hz-4500hz).
So, my question is: is this a good idea?
Or, should I rather go for a 'diffusion only' approach to this wall?
Here are some other basic points to note:
1. I am REALLY keen on using diffusion on this wall, hence my not
mentioning an 'ABSORPTION ONLY' option.
2. I have a decent distance from listening position to the wall (4 meters), so I am fairly confident about the viabilty of the diffusion.
3. The root of my confusion is my reading that most folk either have absorption OR diffusion at first reflection points on wall behind mix position. In my searching, I have not found references to or examples of the 'combo approach' which I am proposing.
Take care and thanks a million
Nolan
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#1902466 - 03/03/08 08:14 AM
Re: Ethan, oh oracle, your opinion on my diffusion scheme pls...
[Re: Nolan Chiat]
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Ethan Winer
MP Hall of Fame Member
Registered: 06/12/00
Posts: 5300
Loc: New Milford, CT, USA
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I have no idea. 
Seriously, I really have no idea.
How far back is the wall behind you? If it's close by I'd go with absorption only.
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#1902640 - 03/03/08 01:01 PM
Re: Ethan, oh oracle, your opinion on my diffusion scheme pls...
[Re: Ethan Winer]
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Nolan Chiat
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Registered: 06/06/07
Posts: 34
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Ethan, thanks for trying here!
I have about 3.8 meters between me at the mix position and the back wall.
S'far as I've read (somewhere in the forum), I got me enough distance.
I am not sure if I have any other info that is relevant.
Of course I can fill you in more on the room dimensions and my grand absorption scheme...etc...but I am not sure that that is relevant to my 'back-wall combo treatment' question..
Cheers
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#1903129 - 03/04/08 09:25 AM
Re: Ethan, oh oracle, your opinion on my diffusion scheme pls...
[Re: Nolan Chiat]
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Ethan Winer
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Registered: 06/12/00
Posts: 5300
Loc: New Milford, CT, USA
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At that distance diffusion is certainly a viable option.
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#1904780 - 03/06/08 06:09 PM
Re: Ethan, oh oracle, your opinion on my diffusion scheme pls...
[Re: Nolan Chiat]
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Speaker Boy
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Registered: 02/04/08
Posts: 62
Loc: Santa Barbara, California
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Here is a picture from auralex of their diffusors setup with absorption. I think it looks nice to have diffusion and absorption in an alternating pattern.
Your back wall is far enough away from your listening position that you dont actually "need" diffusion or absorption on that wall.
I am not sure what would be accomplished by alternating absorption and diffusion on a wall that far away. Maybe Ethan could explain this better or give me a nice link to look at.
Jeff
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#1905011 - 03/07/08 07:29 AM
Re: Ethan, oh oracle, your opinion on my diffusion scheme pls...
[Re: Speaker Boy]
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Ethan Winer
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Registered: 06/12/00
Posts: 5300
Loc: New Milford, CT, USA
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Heh, when I mentioned diffusion I meant real diffusors, not one-inch thick pretend diffusors.
--Ethan
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#1905259 - 03/07/08 12:47 PM
Re: Ethan, oh oracle, your opinion on my diffusion scheme pls...
[Re: Ethan Winer]
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Speaker Boy
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Registered: 02/04/08
Posts: 62
Loc: Santa Barbara, California
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I know I just wanted to show him a pretty picture. He said he hadn't seen a combo setup before.
Jeff
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#1905393 - 03/07/08 03:36 PM
Re: Ethan, oh oracle, your opinion on my diffusion scheme pls...
[Re: Ethan Winer]
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Nolan Chiat
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Registered: 06/06/07
Posts: 34
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Heh, when I mentioned diffusion I meant real diffusors, not one-inch thick pretend diffusors. --Ethan
Ya, I kinda thought those were a bit 'lightweight' (snigger).
My skylines will be about 450mm deep (that diffuses down to around 400hz...can't remember the exact length). You see, when you have to replace the roof of your house, it's amazing the spare timber that becomes available.
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