blue foam skyline diffuser

[Disjointed]

has anyone here tried (with success) the 2" blue foam style of skyline diffuser?

http://www.bobgolds.com/DifuserKgveteran/home.htm

just wondering if theres any comments on the effectiveness of these

(im looking for some cheap lightweight diffusion)

pre- thx

[Glenn Kuras]

Originally Posted by Disjointed

has anyone here tried (with success) the 2" blue foam style of skyline diffuser?

http://www.bobgolds.com/DifuserKgveteran/home.htm

just wondering if theres any comments on the effectiveness of these

(im looking for some cheap lightweight diffusion)

pre- thx

If you are doubting if it will works then don't. But as far as looks go I can not see it looking very pro.

Glenn

[jdg]

where he says "cut randomly"
skylines are not "random" (they are calculated random)

while they probably sound different then a flat wall, they are not diffusing like a traditional skyline does. and may actually sound worse.

there was a post on here about the density of foam needed for diffusion to even work... and im not sure the "blue foam" has the right density

ah found it
What should a skyline diffusor be made of?

[Glenn Kuras]

where he says "cut randomly"

Oh wow I thought it gave you the measurements for the blocks.


Glenn

[Disjointed]

right,
i wouldve ignored the 'random' blocking, and inserted something based on the BBC papers... (something close to 7,5,3,1)

the problem with density? it would only reflect the highs? mids/lows partly absorbed? or chaos all around?


backstory: i just finished a 2' x4' pine 2x2 skyline... and its freakin heavy, i cant see putting 2-3 of 10' above the drummers head... .. and im capped at around $150-$200 for the project

thx

update: i found some info.. the foam in question is 1.60 pcf .. much shy of the recommended 2.8 pcf. ... what problems can i expect?.. i am ok with some absorption.. i have some flutter i would like to get rid of.

[Glenn Kuras]

I will email our diffusor guru, Jason, to get his thoughts on this thing.. If he has time maybe he can post.

Glenn

[Jason Jones]

Originally Posted by Disjointed

the problem with density? it would only reflect the highs? mids/lows partly absorbed? or chaos all around?

If the density is too low, then the lower frequencies won't even know that it's there. The higher frequencies will be diffused and the lower frequencies will do what they were doing before the diffuser.

backstory: i just finished a 2' x4' pine 2x2 skyline... and its freakin heavy, i cant see putting 2-3 of 10' above the drummers head... .. and im capped at around $150-$200 for the project

You might just want to get a football helmet for your drummer....though on second though, they are pretty pricey....maybe not.

update: i found some info.. the foam in question is 1.60 pcf .. much shy of the recommended 2.8 pcf. ... what problems can i expect?.. i am ok with some absorption.. i have some flutter i would like to get rid of.

At 1.6 pcf, I think the diffuser will reach down to about 1 Khz....maybe a hair lower. It will get rid of flutter. A little here and there would probably help. I wouldn't use too much of it in a room though, because of the limited bandwidth.

[Disjointed]

thanks for all the help!

one last little question...

so if i made this 4x4' panel.. and it diffused down to 1k-ish ... the bass & low mid would pass right through...

now if i made this diffuser the face of a cloud.. something like diffuser,2" gap, 2" mineral wool. 2" gap, ceiling .....

would i see something like.. diffusion to 1k, then absorption down to like 200ish hz..

or am i just messing with too much chaos here.

(btw, i hung the other skyline on the back wall yesterday, took 3 ppl to get it up there... that thing would crush the drummer to deathif it fell onto their head)

thx

[avare]

Originally Posted by Disjointed

would i see something like.. diffusion to 1k, then absorption down to like 200ish hz..

That is exactly what you would get, something. Without testing no one can predict exactly what you will get.

Andre