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Reload Thread: Polyfill in ported box?

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    Icon32 Polyfill in ported box?

    Just thought about this since I might not have enough room. I was wondering if you could use polyfill in a ported box to supplement for not having enough room. Also I know you can do up to 50% polyfill but how much cuft. does each pound or so give you?


    Thanks for the help



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    Re: Polyfill in ported box?

    not a good idea.. it will throw your port off...




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    Re: Polyfill in ported box?

    Quote Originally Posted by i3abyjay25
    not a good idea.. it will throw your port off...
    any other reasons because its not a good idea? I was thinking the same thing but i have removable ports. so that wouldnt mean much to me




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    Re: Polyfill in ported box?

    Ported boxes work on the movement of air rather quickly in the box, reflecting off the back of the box/woofer, so polyfill would only slow the air down, yielding in less output from the port, thus hindering your box more than helping it. A sealed box on the other hand, the output can be increased with some polyfill in the right situation. :thumbsup



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    Re: Polyfill in ported box?

    So I am SOL then I guess.



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    Re: Polyfill in ported box?

    Quote Originally Posted by Ricktc
    Ported boxes work on the movement of air rather quickly in the box, reflecting off the back of the box/woofer, so polyfill would only slow the air down, yielding in less output from the port, thus hindering your box more than helping it. A sealed box on the other hand, the output can be increased with some polyfill in the right situation. :thumbsup
    My understanding is that the purpose of polyfill in a ported enclosure is to slow the soundwaves down, creating the illusion of a larger volume, which will help (or hurt) SPL performance based on the specifications of the driver(s) used. Someone with more expertise on this might be able to back me up (or school me if I'm really off).



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    Re: Polyfill in ported box?

    Polyfill will decrease efficiency/ output but help A LITTLE on sq. It does not make the driver think it is in a bigger box, this is a myth. It helps attenuate higher freqs and extends low freqs, so thats why people think it "makes the box bigger" Basically for your set up..polyfill will not help you..you are SOL




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