jethro

I bought a 10" JL Audio WO already in a box specially made for the sub. I opened it up a few minutes ago and the box has a bunch of stuffing of some sort inside of it. It's white and kinda looks like cotton. Should I take that out or leave it in? Thanks.

SoCal4Running

Leave it in!!!
Its polyfill material that makes the box act like a bigger box. It slows the sound waves down or something like that.

jethro

I just went through all the trouble of taking it out! Oh well. Thanks for the reply though.

SoCal4Running

Sorry I laughed!

I robbed this from a page so dont tell anyone.

Polyfill is basically fiberglass, like the pink insulation stuff. There are variations of polyfill, like "Polyfil", that can be found in arts & crafts stores. "Polyfil" will work almost as well as fiberglass, but without the nasty problems you run into when working with the pink stuff. By using polyfill in a sub box, it will artificially make the box act larger than it is, which will improve the deep bass response. Note that actually making the box larger than the driver is designed for will make it sound like crap. The speaker manufacturer or distributor will be able to tell you how much you should use. Otherwise, the only way to find out is by trying it yourself. Add about 1/2 pound at a time, until you like what you hear. When using polyfill, try to spread it out evenly, and try to make sure it doesn't touch the driver. If you are using a ported box, then only line the sides of the box with a 1" thick sheet of polyfill. You can buy polyfill that comes in sheets or loose.

LBC994runner

polyfill is good stuff ... put it back in!

Praufet

wait so the stuff at craft stores is just as good as what I'd get from parts express?

LBC994runner

I'm pretty sure it all works the same ... walmart has it it cheap in its craft/fabric section.

Gangus2006

its all the same...get pillows on sale and use that...(take it out of the fabric first!)

mudbuster

if you cant get the sound right and you want a deeper sound and if it is a ported box you should just seal it it will have more sound and will handle more power good luck

AW1090

do you know the airspace your sub is rated for?......the polyfill slows the wave down like mentioned earlier. It is all the same stuff....if you know the cubic air space needed for the sub then I'd seal it up with the correct air space. Sealed with the right airspace should give a harder hit.....I think the ported and band pass box(half sealed space and in front of speaker half ported) gives more of a deep rumble. I don't know a ton, but picked up stuff from the brother in law. He was a big Car toys employee back in the day. Just my thoughts hope it helps

anthony

does anyone know if a jlaudio stealthbox for 2003 model fit in a 2001 model. the 03 sub has 300w and the 01 has 125w