Ported box for 2 DC level 4 12's

[Navy_Doc 10+ year member]

When calculating the port volume of the box do I need to use the required CuFt for the subs or what the gross volume would be? and how do you prevent port noise? and when I calculated the port dimensions tuned at 33Hz I get a port area of 42.40 in^2 with a width of 4in and height of 10.5 the length is 61.99 inches did I do this correctly?

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[Navy_Doc 10+ year member]

Here is what I've got so far.

 

[Jeffdachef 5,000+ posts]

Ditch RE calculator asap.

Use this one

Torres' Box Tuning Calculator - Updated 8/18 - Subwoofers / Enclosures - SMD Forum

In conjunction with winisd pro (google it, free download). There are youtube tutorials on winisd.