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Message: <blockquote data-quote="helotaxi" data-source="post: 2858296" data-attributes="member: 550915">If the box is smaller you can go with less port area.  A larger box will have a higher port velocity than a smaller one with the same port.  The other thing you can do is flare the port.  The increased area from the flare will increase the mass of air in the port lowering the tuning and the flare will difuse the air lowering the velocity of the air at the exit point of the port decreasing the likelihood of port noise.The box I just built for my '03 XXX is 2 cf tuned to about 30hz.  Port length of 45.75".  Port goes down one side across the back of the box and then starts up the other side.  34.5 in^2 of port.</blockquote>

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