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    Which of the T/S Parameters show wat kind of box to use?

    i remember something being posted like this not too long ago and there is a certain T/S spec of a sub that lets you know if the sub will work optimally sealed or ported. Which one is it?




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    Re: Which of the T/S Parameters show wat kind of box to use?

    Efficiency Bandwidth Product...

    Fs/Qes




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    Re: Which of the T/S Parameters show wat kind of box to use?

    and, what are the numbers that determine?




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    Re: Which of the T/S Parameters show wat kind of box to use?

    EBP:
    taking the driver free air resonance (Fs) and dividing it by the electrical Q (Qes). If the resulting number is around 50 or less, you are looking at a driver that is best suited to a sealed type box. If the EBP is between 50 and around 100 or more, the speaker will work best in a vented enclosure. Horn loaded designs will perform best with an EBP of 150 or even higher.

    Sealed box (and sealed bandpass) woofers should have the following characteristics:


    Qts => 0.40
    Fs <= 35 Hz
    Xmax => 4 mm

    Vented or ported box (and ported bandpass) woofers should have the following characteristics:


    Qts <= 0.40
    Fs <= 45 Hz
    Vas should be relatively low (less than 4 cubic feet unless enclosure size is not a factor).




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