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  1. Ported Subwoofer Build Projects
    I am a noobie here so the answer may be obvious. I am interested in building a couple of subs using the new SI DS4-18. On their web sites a couple of their specs are: Fs 17 Mms 561 g Cms 128.3 However if I input the Mms and Cms into WinISD the Fs is calculated as 18.76 Which should I...
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