What is that cloth you pit in a sub?

[Terranova 10+ year member]

im trying to find out what the stuff is you put in your sub box thast supposably tricks the sub into thinking its a bigger box than it is.

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[terra 5,000+ posts]

polyfill

 

[Terranova 10+ year member]

thank you!

 

[terra 5,000+ posts]

next question is...whats the ratio of amount of polyfill to cu. ft. increase?

 

[Terranova 10+ year member]

does polyfill work in a ported box?

 

[Terranova 10+ year member]

next question is...whats the ratio of amount of polyfill to cu. ft. increase?

fuck if i know

 

[ultimate157 5,000+ posts]

does polyfill work in a ported box?

Yes

 

[terra 5,000+ posts]

fuck if i know

haha. I think it works in ported, just make sure you fasten it down so it doesnt blow out the port. Gotta know how much to put in though..

 

[Terranova 10+ year member]

found it

1/2 lb. of dampening material per cubic foot of enclosure.

 

[Rashaddd 5,000+ posts]

fuck if i know

I remember reading on some guys tests he did with it that if you're trying to get the box to seem as big as possible, add ~.75-1lb per cubic foot

 

[terra 5,000+ posts]

found it
1/2 lb. of dampening material per cubic foot of enclosure.

every half pound "increases" enclosure size by 1 cu. ft?

 

[Terranova 10+ year member]

source:

http://www.partsexpress.com/pe/pshowdetl.cfm?&Partnumber=260-317&scqty=3

 

[Terranova 10+ year member]

they just recomend 1/2lb per cu ft doesnt increse by a cu ft lol. at least i dont think it does.

 

[terra 5,000+ posts]

they just recomend 1/2lb per cu ft doesnt increse by a cu ft lol. at least i dont think it does.

I've always wondered if its known how much you have to put in to increase the volume the subs see..

 

[Rashaddd 5,000+ posts]

I've always wondered if its known how much you have to put in to increase the volume the subs see..

I'll try and find the source I got my number from