Roxul Rockboard 60 - best LF absorber Roxul makes?

[avare]

Acoustics is not intuitive. As bass trap thickness increases, less dense material is better. For 6"traps fully filled, Rockboard 40 is better.

Andre

[danbronson]

I didn't realize that! Thanks for the response.

So I guess the question becomes, is Rockboard 40 my best bet for 6" traps where really low frequencies are concerned?

[avare]

Originally Posted by danbronson

I didn't realize that! Thanks for the response.

So I guess the question becomes, is Rockboard 40 my best bet for 6" traps where really low frequencies are concerned?

Your welcome. Best is avery subjective term. Rockboard offers ease of use. Safe n Sound offers great bang for buck. Fibrex, OFI, Knauf etc all make equivalent products. Ask for "4.0lb/ft^3 rigid mineral wool" and compare prices, delivery times, etc.

Good Luck!

Andre

[Krimson]

I picked up Rockboard60 and will be making superchunks out of it. I don't see a problem at all with it doing a good job for that application. Just by placing the stuff in the room has made a huge difference and I have not even put it up yet. Go with the more denser stuff. According to Ethan he did a test with different densities and the more dense the material the better it was. It was even better with the frk in front of it as well.

[iangomes]

I'm just about to make some 4" panels and a few superchunks. Is 4lb/ft3 fine (rockboard 40) or would 6lb/ft3 (rockboard 60) be a better idea? I'm not going to frame them so if the 60 is much more rigid it seems I might have to get that.
thanks!

[avare]

Originally Posted by iangomes

I'm just about to make some 4" panels and a few superchunks. Is 4lb/ft3 fine (rockboard 40) or would 6lb/ft3 (rockboard 60) be a better idea? I'm not going to frame them so if the 60 is much more rigid it seems I might have to get that.
thanks!

Acoustically the 4 lb/ft^3 is better. Roxul makes several types of insulation at that density with various amounts of rigidity. You can probably find a 4 lb/ft^3 material that has similar rigidity to the 6 lb/ft^3 material.

Andre

[iangomes]

great! thanks. Is the rockwool 40 the same as 703? I did a search but some people said yes they are the same and some people said rockwool can cruble easily. I"m not going to take my panels out for a night on the town but i don't wnt them to break and I have to make new ones.
thanks

[avare]

Originally Posted by iangomes

Is the rockwool 40 the same as 703? I did a search but some people said yes they are the same and some people said rockwool can cruble easily. I"m not going to take my panels out for a night on the town but i don't wnt them to break and I have to make new ones.

Acoustically for practical purposes they are the same. As far as crumbling etc., go to the suppliers and feel the materials yourself. you posted earlier that you are not going to frame the absorbers. 703 can not be used with out a frame for support in panels, so comparing it is meaningless. Only you can decide if crumbliness is acceptable.

Andre

[iangomes]

Thanks Andre, I appreciate the help.
lol, crumbliness is a funny word.
Thanks again!
Ian

[Halexx]

For superchunks corner, Safe and Sound is hard enough, have similar absortion quality, and is many times much cheaper than Rockboard.

I suggest you take a look into it.