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Silver Member Username: 2pacalypse1971Sandusky, Oh Post Number: 243 Registered: Jul-05 | ok i have a prefab box for 2 12's that is ported and i alwasy wondered if there was a formula to see what it is tuned to and what the cubic feet of it it and everything, i'll post the dimenstions of everythin if anyone can help.. it is Lenght---36 inches Height---13 1/4 inches depth---16 inches The port is in the middle of the 2 chambers and is 3 inches wide and 12 inches tall....this is just a throwout, if no one knows anythi bout it its fine i jsut always wondered and my local audio shop seemed to have no idea what was goin on Thanks! |
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Silver Member Username: Nd4spd18Post Number: 310 Registered: Jul-06 | I assume those are external dimension? If so, you need to know the wood thickness. You also need the depth of the port walls to calculate the tuning. |
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Silver Member Username: 2pacalypse1971Sandusky, Oh Post Number: 244 Registered: Jul-05 | the depth of the port walls are 13.5 inches and the wood thickness is 5/8 inch |
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Bronze Member Username: LowganPost Number: 14 Registered: Feb-07 | http://www.rockfordfosgate.com/rftech/boxcalculator.asp this will tell you the cubic feet for future reference. 3.559 cu. ft is your answer though |