Hey guys its me again...

I put in the size box i want and the wanted tuning frequency into winISD...i wanted to make a dual ported box so i chose two 3" round ports and it gave me a length of 37". Does this mean that each port has to be 37" or each port has to be 18.5"? i've always done single ported boxes and i want to put in two ports for a little more style...thanks guys.

 

it was just a test in winISD...i was foolin around and i just made a 1.5cuft box with a 33hz tuning thanks Dukk.