Polyfill, .25 cu ft gains?

[ARK_SWAMP_RIDER 10+ year member]

I am looking at getting a new sub, probably a single 10. The box I want is .75 cu ft, the sub recommends 1 cu ft. Would adding polyfill do enough to get that combo to perform well? If so, how much polyfill should be used? Thanks.

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[tcguy85 10+ year member]

stuffing it will help. i don't think there is an exact formula to it though.

 

[bad @SS chevy 10+ year member]

I think adding polyfill just makes the sub sound like as$hole! but thats my opinion,, what do i know..?

 

[dipitydoo 10+ year member]

.25cf is a stretch. It should have minimal effect, if inaudible, in the car audio environment. Polyfill works better for mid frequencies to minimize resonance.

 

[konechiwa 10+ year member]

wasn't it 1lb to 1cu ft. ratio? I thought the most you could resonably gain was .10 to .15 cu. ft.

 

[mrogowski 5,000+ posts]

Wasn't it you who posted before about a sub, polyfill and 0.75 cubes?

Fill within an enclosure can "increase" box volume by up to 30%. Beyond that, the more you add, the more the internal volume decreases.

I never use polyfill myself, but as others have stated, 1 pound per cube is about right. I use fibreglass.

Best,

Mark

 

[ARK_SWAMP_RIDER 10+ year member]

I posted about using polyfill in an enclosure of the correct size, not using it to fool the sub. The specs I gave were off, box is .75, min for the sub is .8. Anyway, I have decided against that setup, it isnt going to work out well with the volumes. Thanks everyone.