Should I put polyfill in my box?

[supraman1379 10+ year member]

I have two 10" RF P2 Punch subs in a small sealed box behind the seat of my 1986 silverado. And the manual for the subs say that theyre better in small sealed enclosures. But i was wondering if i should put some polyfill in my box?

Thanks

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[infinity1412 10+ year member]

i heard using polyfill does slow the response down somewhat and that it does help lower frequencies, if this is true then im gonna go buy some, isnt it 1 lb per cubic foot for the best results???

 

[Electro16 10+ year member]

Yeah, every book i've ever read has said to use polyfill. It actually makes it seem like the subwoofer is in a bigger enclosure than what it is actually in. Also, Infinity, I'm pretty sure that you are right, 1 lb per cubic foot, should do fine.

 

[infinity1412 10+ year member]

alrite thanks for the help

 

[green_slip 10+ year member]

when i went to the store to buy some polyfil i found out that they come in pillow shaped things. so are you supposed to just buy a couple of those and cut it open and dump what's inside into your box or what?

 

[monte_carlo97 10+ year member]

Would it also be wise to put some in a ported box or not. I know it is highly reccommmended for sealed but i don't know about ported.

 

[Benny212 10+ year member]

Would it also be wise to put some in a ported box or not. I know it is highly reccommmended for sealed but i don't know about ported.

it would blow out of the port after a while probably... I'm thinking thats not a good idea

 

[Strecker25 10+ year member]

if the box your sub is in is the correct cubes there isnt a need for polyfill, sometimes it can help the driver out to reproduce the lower frequencies though

 

[JLFAN]

When i had my 2 10" JLs i used it in my box, and i took it out and listened to my subs and it makes an awesome difference. I thought they sounded a lot better with the polyfil.

 

[supraman1379 10+ year member]

that settles it then....im puttin polyfil in my box.

 

[infinity1412 10+ year member]

does the polyfill actually make a really noticable differance though, like lets say my system is REALLY loud at 43 hz, but sounds like shit around 30 hz, if i put pound of polyfill per cubic foot would it sound nice around 30 hz?

 

[Electro16 10+ year member]

Um... well, the polyfill also keeps the sub from bottoming out because it adds extra resistance. I'm not sure if it will make a difference or not at 30 Hz. It could sound bad for a couple of reasons, 1. being that the sub just doesn't work well at that low of frequencies or 2. If the enclosure is ported, it might not be made for that low of frequencies. To answer green_slip's question, yes, just buy a bag or two of the polyfill stuff, and spread it out evenly in the enclosure, but make sure it isn't all over the subwoofer, you want the sub to have a little room from the polyfill. In addition, yes, you can put the polyfill in a ported box as well, it does basically the same thing in both kinds of enclosures. However, make sure the polyfill isnt in the way of the port hole.

 

[LimPerT 10+ year member]

- Should you try to keep the poly-fil away from the speaker terminals?

- Should you just put it in the box or should you fasten it down some how?

-David

 

[infinity1412 10+ year member]

today i just stuffed all 4 of my sub chambers with polyfill and it made a huge difference, b4 it sounded like shit around the low 30 hz area, now its loud as hell

 

[infinity1412 10+ year member]

i just put 1.5 pounds in my box since my box is 1.5 cubes, its really close to the magnet but i think itll be alrite, i didnt have to strap it down or anything