So im on the 12volt.com using their box calculator.
The box is 18x18x30 which gives 4.49cf using 3/4 mdf.
The port i put in is 16.5 wide figured by taking 1.5 from 18 and making it 4" tall. Tuning it to 34 hz calls for the port to be 27.4" long.
My question is if the box is 18x18x30 to get the 4.49cf do i need to add the extra 4" to that for the port to the height or is the port part of the 18" height?
Im thinking i need to add the 4" to the height. Just not sure tho.