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    should i put polyfill?

    ive just build my first box (sealed) to practice a bit before i do a ported box very soon!
    is it useful to put polyfill in the box? its 2.3cu.ft NET







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    Re: should i put polyfill?

    Try it empty first, if it sounds boomy add the fill.

    Fill is a SQ tweek that damps resonance and will have a dB cost (typically 2-3db at resonance)




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    Re: should i put polyfill?

    i would,it "tricks"the woofer into seeing its in a bigger box.i read a mag. a while back where they tested the results,got up to a .4 cu.ft.gain with polyfill.




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    Re: should i put polyfill?

    i find that if the box is made just right, no polyfill is needed.



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    Re: should i put polyfill?

    if you use it, usually 1lb per cu'.



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    Re: should i put polyfill?

    do people use polyfill for ported? is it possible it could catch fire?



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    Re: should i put polyfill?

    polyester will melt before it combusts, either way i don't think you have to worry about that unless something else is seriously wrong.




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    Re: should i put polyfill?

    Quote Originally Posted by xluben
    ....unless something else is seriously wrong.
    right.

    but yes, you can use it in a ported box but is uncommon since you can tune the box lower (or higher) by the port length....instead of using polyfil to get a sealed box tuned lower.



    2006 Jeep Liberty
    Adire Audio, Cadence, Clarion, MB Quart

    Lv = [(14630000 x R^2) / (Fb^2 x Vb)] - 1.463R
    *Vb = vol. in cu"
    **R = sq.rt. A / Pi (for square/slot port)

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    Re: should i put polyfill?

    I read an article that said ALWAYS use polyfil in a sealed application........ALWAYS.



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    Re: should i put polyfill?

    ive just putted 1lb of polyfill and WOW, theres alot of difference, its smoother, deeper and louder! im gonna put another lb and a half!




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