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Discussion Starter · #1 ·
OK, so I have this space under my steps that has remained unfinished since I started using the space, over a year. I know, terrible.


So the question is this, I want to try and get this done once and for all, but before I do, I needed to move my wiring. I am replacing my rear towers with some real surrounds, so the wire needed moved up, so I had to pull out the insulation that was there and this is what got me thinking.




As you can see, each stair cavity has the OC703 and then the large space underneath is filled with normal pink insulation and then the face was a single layer of OC703. I was curious if it would make a difference if I doubled up the OC703 on the face there, or is the single layer enough? I have the extra OC703, so if it would make a difference I will double it up, but if it does not really make a difference, then I will stick with the single layer I already had as opposed to wasting it.


Hope that makes sense what I am asking...is more better or worse in this case or is it a wash/personal preference and can go either way.


Thanks.
 

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From Bob Golds Reference table


at 125Hz the NRC data is (the lowest frequency with data):


1 inch .11 absorption

2 inch .17

3 inch .53

4 inch .84


IMHO you don't have much bass trapping going on with your design but then again I haven't had my coffee.
 

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Discussion Starter · #3 ·
So your saying more in fact is better in this case...a for design, I went with a bpape recommendation. At least this is how I understood it to be
 

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I've had my coffee and re-read your post. How deep is the pink fluffy under the stairs? if that whole area is stuffed then that makes things different and it is probably the major factor in this bass trap. If that is the case I suspect that the difference between the one and two inch surface layer is negligible.
 

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Discussion Starter · #5 ·
Its like 3-4 feet at the base and 45"high at the front opening
 

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Discussion Starter · #6 ·
Quote:
Originally Posted by BIGmouthinDC
I've had my coffee and re-read your post. How deep is the pink fluffy under the stairs? if that whole area is stuffed then that makes things different and it is probably the major factor in this bass trap. If that is the case I suspect that the difference between the one and two inch surface layer is negligible.
I just re-read this again...I guess I needed my coffee as I totally didnt read your response correctly.


Yes, the entire space is filled with the pink fluffy stuff. It is lightly layed in there as to avoid compressing it.


Therefore, based on your response, the single layer is all that I will need and should keep things the way they were and now just finish the space by getting it covered with some cloth.


I just cant believe the wife has let it go all this time and has never really complained about it being unfinished like that. Well, the face did have the 703 on it and the 2 towers were sitting there, so it wasn't exactly like the picture, but still, you get the point.


Thanks BIG, you just save me some 703 for my acoustic panels that have been on my mind since, well, forever.
 
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