I need help with a port!!! Please help!!!

[kendall64 0]

i have 2 18'' AQ HDC3 in a that is 11.5 cubic feet. i would like you make a round tube port for it tuned to 47hertz for spl and another one at 32 hertz for daily. i need help with figuring put how many round ports i need and how long they need to be. i would prefer to do 4'' round ports but will go to 6'' ports if needed.

[ricksi30 923]

You will be better off with a slot port, or a much bigger aero port. If you used 6" aeros you would need a lot of them.

[16K 159]

You will be better off with a slot port, or a much bigger aero port. If you used 6" aeros you would need a lot of them.

agreed.