Port area per foot

[SnowDrifter]

Port area per cubic foot is just a rule of thumb anyways. You really need to be concerned about how much power area you need for your given cone area, power, and tuning

[RobertR]

2 sa-12s at close to 2k watts. Got everything figured out except how to get three 4 inch aero's in a 16 inch tall box. how much space do I need for a 4 inch aero port? How big is the over hang on the flare?

[Trey_Dog650]

Depends if you have flares or not

[mothra]

11-16 sq in per ft if it's slotted, 5-9 sq in per ft if it's round. the reason is b/c round ports don't have as much turbulence so they are more efficient. being a round port with flared ports is even more efficient so closer to 5 sq in per ft is just fine. 6" aeroport in 4 cubes is fine but you're over 4" so I'd run 3 4" aeroports.

[RobertR]

yeah I got that. My only concern now is how to get three 4 inch aero ports into a box that's only 16 inches tall. How much space do I need between each port? how far do my port tubes need to be from my subs?

how wide is the lip on a 4 inch aero port?

[Trey_Dog650]

I think it's like 2 inches

[RobertR]

I think it's like 2 inches

so a 4 inch aero port has a 8 inch diameter?

[Trey_Dog650]

Depending where you get it... The ones on parts express are 7 1/4

[RobertR]

I guess I wont be using flared ports.

[Trey_Dog650]

Lol