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<blockquote data-quote="hispls" data-source="post: 8614900" data-attributes="member: 614752"><p>Because if you want to get loud you want as much port area as you can get and typically rectangular is best to give you that. Also having the port across from the sensor is generally best for the meter.... ie. port behind driver for DB drag metering or port up top for at the kick metering. I gained almost 1.5dB opening my port from 300"^2 to 420" and that's keeping tuning the same and working with less than optimum shape.</p><p></p><p></p><p>If you have all the answers why did you come here and ask the question? Use your 4" round ports 6" long and see what happens.</p><p></p><p>Geometry says that before you get to 1" peak to peak displacement with those woofers you completely unload your port. Good luck!</p></blockquote><p></p>
[QUOTE="hispls, post: 8614900, member: 614752"] Because if you want to get loud you want as much port area as you can get and typically rectangular is best to give you that. Also having the port across from the sensor is generally best for the meter.... ie. port behind driver for DB drag metering or port up top for at the kick metering. I gained almost 1.5dB opening my port from 300"^2 to 420" and that's keeping tuning the same and working with less than optimum shape. If you have all the answers why did you come here and ask the question? Use your 4" round ports 6" long and see what happens. Geometry says that before you get to 1" peak to peak displacement with those woofers you completely unload your port. Good luck! [/QUOTE]
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