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Message: <blockquote data-quote="PowerNaudio" data-source="post: 1133285" data-attributes="member: 561215">use the rear port air velocity window, when changing port width and length and try to stay as close to the 17m/s or below as you can, since any thing above that speed makes port noise and also keep an eye at the freq that the peak of the curve is on, since that the freq when youre actually going to hear the port noise. if the freq is high then dont worry about it and if its below a freq youre sure youre never going to play on like 25hz or for sure 20hz and below then dont worry about it ether.also, on the signal tab make sure you put on there the rms power youre going to be giving the particular sub or subs youre designing the box for since that will change how fast the air goes in and out off the port.</blockquote>

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