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Message Forums Car Stereo Message Forums > > polyfill in sealed box...good for sql?
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joshwill0001
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 polyfill in sealed box...good for sql?

Read a lot of shit on polyfill but seems pretty ambiguous. I do not have the room for ported box's (for twin L7 12inch solo barics) so going to have to have sealed box's. Would polyfill add to the sound quality of subs? Not interested in SPL whatsoever, i have a 1000x1 running to each so power is no porblem but sound ceratinly is. What purpose does it serve? If it is a good idea then how should it be done? Some say coat teh walls with a spray, some say fill the box with pillow fill. Clarifications of what to do in what situation would be good... I (will) have 2 L7 12 inch solo barics (running at 1ohm) off 2 crossfire VR1000D amps if that helps. Thanks guys

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New Post 02-02-2007 09:28 AM
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N2Audio
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all it does is make the box perform as a slightly larger box. To get that effect I THINK the box needs to be stuffed. One lb per cu ft is the general rule.

However, if you have enough room to make the box as large as specified I don't think polyfill would be worth messing with.

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gameguru1360
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polyfill does help a little though. I put polyfill in my sealed box and the lower hz don't resonate as much as when the box was empty

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joshwill0001
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 RE:

quote:
Originally posted on 02-02-2007 by gameguru1360
polyfill does help a little though. I put polyfill in my sealed box and the lower hz don't resonate as much as when the box was empty

Thanks n2 and gameguru, kicker website recommends sealed between 0.88 and 2.0 cubic foot (per sub). i am going to be looking at 1.6 cubic foot sealed per sub (should have specified that earlier, sorry)...polyfill recommended? If so what and where? SQL as importance...(i can shit easy enough without SPL encouragement) cheers guys

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gameguru1360
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you should be able to find polyfill really cheap at your local crafts store. The Michaels and Joanne's chain stores that mostly sell quilting supplies has polyfill. I got a 20oz bag for under $5. I went with the curly material. there is also a cotton material, but it looked as if it came in 1 big roll. The curly material looked bulkier and looked as if it would bunch up better if you stuffed it inside an enclosure.

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New Post 02-02-2007 11:30 AM
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joshwill0001
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 RE:

quote:
Originally posted on 02-02-2007 by gameguru1360
you should be able to find polyfill really cheap at your local crafts store. The Michaels and Joanne's chain stores that mostly sell quilting supplies has polyfill. I got a 20oz bag for under $5. I went with the curly material. there is also a cotton material, but it looked as if it came in 1 big roll. The curly material looked bulkier and looked as if it would bunch up better if you stuffed it inside an enclosure.

Sweet...can prob find something somewhere. Installation instrcutions? Sealed box, so across all the walls, only the back, only sides.....etc....??????

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New Post 02-02-2007 11:38 AM
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gameguru1360
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I put in polyfill according to the general rule, but with the curly polyfill, it's easier to mold so I try to form it so that it covers all 4 sides. I think the cottony polyfill will only cover the bottom and the sides unless you have the sub pointing upwards

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