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Help trying to design a 4th order bandpass box for 2 18s


Tallyfiman

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I'm trying to figure out where to start at building a 4th order bandpass boxI have 2 fi ssd 18 that are going in a 96 jeep grand cherokee my max dimensions are 55" long 35" tall and 40" wide they will be ran by a 3000 watt amp stil tryin to decide which one though this is my first 4th order build so any help is well appreciated

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Well your are looking at 40 ft^3 internal volume if you you do two layers .75" all the way around. Minus all your displacements that is.

According to FI you need Sealed box: 3.5-5 cuft. If you go 10 Ft^3 on the sealed side. You would be looking are ruffly a 3:1 4th order.

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