calculating port size and length

[77-AUDIO]

I see a lot of post you need x" of port area but it never says the length. And any of the calculators I have seen are for square boxes. RE's does a good truck box. So how do you figure out the port need for a specfic box. I have 6.0 cubic ft before displacement. I am going to use the 10" Si BM which are very simular in size to the Re Audio SE 10's.

heres are the dimensions for the new box. I want the port /ports to stick out of the middle of the box so as to not take away from the airspace. and to allow me to have several different ports for different tuning. I want some tuned to like 40 for spl and some tuned around 32 for daily driving.

[CaptainzPlanetz]

Port area is based on your box size, generally you want 12-16square inches per cubic foot with slot ports, and about 9-12 with flared ports. The only thing length has to do with it is your tuning, and since you plan on doing an external port, it does not affect your internal box volume. Are you wanting to do aero ports or a slot port. With 6 cubes you will want about 72- about 80 square inches of port. So for your port would be about 5 7/8 and 12 4/8 or so to achieve 12square inches of port per cubic foot.

[77-AUDIO]

Port area is based on your box size, generally you want 12-16square inches per cubic foot with slot ports, and about 9-12 with flared ports. The only thing length has to do with it is your tuning, and since you plan on doing an external port, it does not affect your internal box volume. Are you wanting to do aero ports or a slot port. With 6 cubes you will want about 72- about 80 square inches of port. So for your port would be about 5 7/8 and 12 4/8 or so to achieve 12square inches of port per cubic foot.

Thanks. I plan on doing aero ports. now how do I determine the length. and how many ports and what size do I need. I only have an area thats 5.5" x 13.5 to work with.

I might be able to get more but not sure right now. I know I might have to do just standard PVC for the ports because of the size of the area I have to work with.