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    ZO6killinsbf's Avatar
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    Box design issues, HELP!

    Ok, I followed the tutorial and I thought all was going good until I checked the transfer function magnitude in WinISD.

    (2) Infinity Reference 1262w's
    Power Handling, RMS 300 W
    Frequency Response 23Hz - 400Hz
    Nominal Impedance 2 or 8 Ohms
    Sensitivity (2.83V @1m) 96 dB
    Mounting Cutout Diameter (Metric, English) 11-1/8" (282mm)
    Mounting Depth (Metric, English) 6-7/16" (314mm)
    Vas (liters) 80.14
    Fs (Hz) 25
    Qts 0.46
    Xmax (millimeters) 13

    Single square/rectangular port box, 4 ft/3 tuned for 34 Hz
    3/4" MDF 45 x 16 x 16.5
    Inner dimensions: 43.5 x 14.5 x 14
    Port dimensions: 14.5 x 4.13 x 30.51 = 1805.5 in/3

    When I run the numbers it comes up with a peak @ 168Hz!! What did I do wrong or skip? Bad math? Please help.

    Also, I'd like to do the numbers for a center port if at all possible. Thanks







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    mklett33's Avatar
    mklett33 is offline Mark -CarAudioFabrication



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    Re: Box design issues, HELP!

    screenshot please



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    Re: Box design issues, HELP!

    Be sure all of your entered values are correct. The first time I tried designing a box, WinISD said it'd be tuned at 81 hz. I later found out that I mis-entered one of my port dimensions.





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    Re: Box design issues, HELP!

    Quote Originally Posted by mklett33 View Post
    screenshot please
    I'll have to re run the program, my wife shut down the computer and I'm sure I didnt save everything. DOH!




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    Re: Box design issues, HELP!

    This?





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    Re: Box design issues, HELP!

    OK, I went back and re-entered the sub parameters but this 34Hz tune came out to peak at 45Hz, is that ok?





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