Round Port Area Question

[tooshort_128 10+ year member]

I just figured out that a rule of thumb for round ports is about 8 square inches per cubic foot of airspace. First off, is this correct? If so, I'll have an enclosure for a 1" sub that is 2.34 cubes after sub displacement. I was probably looking at 1 4" Aero Port that will be 14.15" long to tune the box to 30hz. This would only give me about 12.56 in^2 of port area and if 8in^2 per cube is right, I would need 18.72in^2. My question is would this give me a lot of port noise and kill the SQ of my sub?

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[skmfkr 5,000+ posts]

i would probly do 2 3" aeros but thats still only 14 square inches

 

[Lakota 5,000+ posts]

You have a 1" sub?

 

[FurbiesAndBeans 10+ year member]

You have a 1" sub?

x2 in a 2.34 cu ft box?

 

[Lakota 5,000+ posts]

I'm assuming you have a 12. Anyways, I'd recommend 2 4" ports if you can fit it.

 

[tooshort_128 10+ year member]

yeah, sorry bout that. It is a 12 that displaces .16 cubes in a 2.5 cube box that gives me 2.34 after displacement. If I put two ports in it they would be longer than I could fit. My box is only going to be about 15 or so deep and go all the way across my trunk. Maybe I could bend them up with elbows somehow?