Sound damper

[Larksp]

i have a some packing foam "from some boxes that got delivered from ups" smooth with out bumps and some with like egg patterns thing on it if you know what i mean.

would that work for sound dampening or is it different ?

would be for a sub woofer box. thanks

 

[SimonTSM]

It would have some effect, but not as good as the real thing.

You usually use many layers with different densities.

 

[Larksp]

so what would be the best types to go for.. for a subwoofer

right now my sub
for music it is great plus most films.

but some films like (Pirates of c 2) with the heart beat the box vibrates alot
i have nothing in the box just empty (well wires and port)
it is slot ported tuned to 30hz (1.3 net vol cubic f) if makes any difference or not.

i am thinking about making another box would probably be slot port as i got easy program type lenth few of details of the sub and the hertz and tells u every thing like sharp each size wood so just easy to do.