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As part of my budget build for my Volvo, I'm trying to use things I have lying around as much as possible.

I have a Rockford Fosgate Punch 12" Sub (P1S412) with the following TS parameters: http://www.rockfordfosgate.com/rftech/library/2007/5_Subwoofers/P1S412_revA-TS.pdf

They recommend 1.02 cu.ft. in a sealed box, but I have an old QLogic 0.85 cu.ft. sealed box I'd like to use. How much should I stuff the box to get the ideal situation using what I have?

Thanks in advance! :D
 

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if you are talking about stuffing it with polyfill, then the general rule is 1 lbs per cuft. any more than that and you will simply start displacing more volume than it helps.
 

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The number isn't 1 lb/ft^3 if you wanna get ideal, that's more or less the maximum number.

Does anyone have the graph, how much effective volume a box gets depending on how stuffed it is?
 

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Ultimate Polyfill Subwoofer Enclosure Resource - AudioJunkies

quote from the article. That is Tom Nuisaine's numbers. he is pretty knowledgeable on the subject
A few rules of thumb: Stuff small enclosures those with up to about 3 cubic feet of internal volume or less with 1.5 pounds of fiberfill for each cubic foot of internal volume and you should get about a 30-percent increase in box volume without seriously affecting other performance variables. For larger enclosures, add stuffing at a rate of approximately 1 pound per cubic foot and you should get a virtual-space boost of about 25 percent.
 
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