quick sonosub question

[darren700]

i am nearing completion of my ported sonosub and have one question. is it a must to put some type of dampening or foam on the inside of the sonosub? what exactly is the gain from doing this? and can i get away without it? thanks for any help. also would the typical yellowish egg carton foam do anything?

[ThomasW]

Line the interior surface with a layer of R-13 fiberglass insulation.

Is it a 'must', yes IMO it is, since I've never heard a sub where the performance wasn't improved with the addition of this damping.

And believe me I've heard a lot of DIY subs....

[darren700]

is it easy to get a hold of? like would i be able to find it at home depot or something?

edit: wait im dumb, are you talking about the pink housing insulation? if so how do i attach it? hot glue?

[ThomasW]

dit: wait im dumb, are you talking about the pink housing insulation? if so how do i attach it? hot glue?

Yes regular old pink stuff. Hot glue is the easiest thing with a tube.

[darren700]

ok thanks for your help also would it affect the tuning in any way? i beleive i recall stuffing a box tricks the woofer into thinking its abigger box?

[nick77]

You can peel the r-13 into layers and line the tube. Its a little to thick to use just by itself. I used spray adheseve to attach the lining.

[ThomasW]

ok thanks for your help also would it affect the tuning in any way? i beleive i recall stuffing a box tricks the woofer into thinking its abigger box?

You have to put a fair amount of it in before it starts having a significant impact on the tuning.