Rockwool or glasswool ?

[jangoux]

Which one is better for bass trapping ?

I can get both. The Rockwool i can get has a 32kg/m3 density or 48km/m3. The glasswool is just 30kg/m3 but much more expensive.

Ivan

[s.d.finley]

Get the Rockwool! Its just the same for acoustical purposes, and its cheaper!

I made my 11foot tall superchunck style bass traps with rockwool. Its available locally so cheap I still cant believe it!

[minus-sounds.com]

Rockwool has been suggested to me by an acoustics engineer.

[kittonian]

Owens Corning 703 is what you want.

[Glenn Kuras]

They all work pretty well. The OC is easier to work with, because of it being more rigid, but rockwool cost less.

Glenn

[tINY]

Acoustic cotton (aka cotton insulation) is cheap too - and no itchy feeling.




-tINY

[Halfmoon]

Rockwool or thermafiber both have better low frequency sound absorbtion characteristics than fiberglass but it can be damn itchy.

[jangoux]

So I guess i will get the rockwool, because 703 is not available where i live (on the north of brazil). How about the density ? The one with the higher density or the other ?

And how about something to calm down the higher frequencies ? What would you use ?

[Getafix]

Ideally density should be minimum 50Kg/m3..You can use 4 to 6 inch panels for bass absorption & 2 inch one's for general absorption..

[diamondjim]

Originally Posted by Halfmoon

Rockwool or thermafiber both have better low frequency sound absorbtion characteristics than fiberglass but it can be damn itchy.

I just finished building two 2 x 7 bass traps using rockwool and it works great and is cheap. 4" thick (2 panels deep). Use gloves, long sleeves, pants (not shorts) when handling.

diamondjim

[Tomer1]

Also use sunglasses or some eyes protection thingy,
When i built my absorbers using rock wool ,a small fiber got into my left eye.
let me tell you ,it was extereamly painful...