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Alternative absorbent acoustic material?

I finally read the owner’s manual that came with a pair of speakers I bought last spring (Revel M126Be) and there is a a couple of paragraphs that talk about treatment materials. Revel states that: "There are numerous options for absorbent material. None are superior to low-cost fiberglass." And it goes on to say that "It is important to use absorbers that are at least 4 inches thick, to avoid altering the spectral response of the loudspeakers." It also says that "Sculpted foam is less efficient" and needs to be "at least 8 inches thick."

I assume that the low cost fiberglass that Revel is referring to is the insulation that comes on a roll that is available from, for example, Lowes? Has anyone tried this, and if so how did it work out?

 

immatthewj
immatthewj OP
1,968 posts
 

Thanks for the input and the clarification on the Dow Corning 703.  I did some searches and I think I am going to play around with some of that.

mashif
244 posts
 

When I built my panels I got Rockwool and 703 from my local insulation supply business at about 40% less than the price from online suppliers. 

gkelly's avatar
gkelly
153 posts
 

@mashif +1 for using local insulation distributors. Couple years ago purchased a case of twelve for around $135.00. Tried to get a current quote but the guy went home for the weekend. So it can’t be much more than that today. 

thecarpathian's avatar
thecarpathian
4,383 posts
 

@mashif ,

Nice one, good to know.

skeptikal's avatar
skeptikal
28 posts
 

I built 28 panels, polycylindrical diffusers, and bass traps out of the Rockwool Safe & Sound from Lowe’s. Works brilliantly. However, Menards has a cheaper mineral wool, Johns Manville Sound & Fire Block, that is the exact same thing.

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