Box help

[JBloud47 10+ year member]

I have a box that iv alreayd built but im ganna make some changes i want to put in a changble port but i cant figure out how to calculate for the port area and lenght, the box is about 12.5 cubes wiht no port or subs. im looking for a port that will tune to 34 and then a comp port @ bout 47.

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[Lowjacker 10+ year member]

i believe you'll need more details like sub displacement .....etc...... but I'm a newb who doesn't know anything beyond that.....sorry

 

[JBloud47 10+ year member]

i know that the sub dis is .36 cubes, besides that all i need to calc is the port displacment , but i cant do that til i figure out how big it needs to be compared to the size of the box.