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Message Forums Car Stereo Message Forums > Subwoofers and Speakers > Polyfilled sealed box? WTH?
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Snowdog
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  Polyfilled sealed box? WTH?

Ok, rather new to car audio, I'll admit. I'm in the middle of building sealed boxes for my two Boss 15" woofers (600w/300w RMS each). I plan on making them around 17x17x30 or so, but I heard something that I found rather interesting. Polyfill. I heard somewhere that if you fill a sealed box 3/4 full with loose polyfill, you can get the same performance from a much smaller box. Does polyfill really affect performance?

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New Post 01-19-2003 01:19 PM
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meanman101
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Poly fill retards the sound waves in the box making the sub think that it is in larger enclosure. The poly fill thing is test and adjust thing. There is no specific amount that can be recommended. It all depends on what sound you like, add some or take some out to get the bass that sounds best to you.

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New Post 01-19-2003 07:26 PM
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