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Old 08-03-2011, 06:00 AM
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Default Port inches....whats it matter?

I like the wow factor of a 6" or 8" port.But is there a difference if you were to use 4" ports to equal the same amount of cu in?This is a hypothetical question but would like to go from the dual 4s we are running now to something more eye appealing for the next enclosure.
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Old 08-03-2011, 06:15 AM
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All I know is dual 4"s will have more port velocity than a single 8". Don't know what it effects though.

2 4" ports will have 25.132 inches of port area.

1 6" port will have 28.274 inches of port area.

1 8" port will have 50.265 inches of port area.



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Last edited by 92K1500; 08-03-2011 at 06:19 AM.
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Old 08-03-2011, 07:01 AM
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Smaller diameters can create port noise if they're too small
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Old 08-03-2011, 09:09 AM
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I swear ive read something before on the forums about the port area of a aero port equaling double of what a slot port would why i dont know.

So if thats true then 1 6 inch aero port equaling 28.274 inches of port area, would be the same as a slot port having 56.548 inches of port area??

Anyone know if there is truth to that?
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Old 08-03-2011, 09:34 AM
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Quote:
Originally Posted by mcarmer View Post
I swear ive read something before on the forums about the port area of a aero port equaling double of what a slot port would why i dont know.

So if thats true then 1 6 inch aero port equaling 28.274 inches of port area, would be the same as a slot port having 56.548 inches of port area??

Anyone know if there is truth to that?
That has to do with aero efficiencies. An aero port (not a piece of PVC) will flow air better than a slot port (in most instances, there are exceptions to this). That's why you can run nearly half the port area with aeros compared to slot ports.
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Old 08-03-2011, 09:36 AM
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Quote:
Originally Posted by mcarmer View Post
I swear ive read something before on the forums about the port area of a aero port equaling double of what a slot port would why i dont know.

So if thats true then 1 6 inch aero port equaling 28.274 inches of port area, would be the same as a slot port having 56.548 inches of port area??

Anyone know if there is truth to that?
no, but generally its more efficient and has better wave speed than slot ports. So you would need less port area per cuft net with aeros to achieve optimal performance.

as for whether to use smaller ports that equal the same amount as 1 larger port: it is definitely easier to use smaller ports IMO (in terms of length, ways to mount, weight), but of all the port sizes i've used, i never got louder than with my single 8" aero. That thing had a MONSTER sound
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Old 08-03-2011, 02:52 PM
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So I am looking at a 6" port....15.25" in length flared.....4.0cuft....tuned 32 hz....this is for a pair of sa12s common chamber.or would I be better off with 2 4" flared at 14"?
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Old 08-03-2011, 03:08 PM
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There is no replacement for square inches, but keep this in mind- you are getting more flare with 2 4" than a single 6". Even though 6" have more port area, that 4" has more flared area per square inch compared to the 6". So I would say they would be close to the same.

With all that said, I like doing as few ports as possible.
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Old 08-03-2011, 04:00 PM
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I want to use the 6" flare....the only place we can mount it would be on the side.Is this less efficient than mounting it on the rear of the box in a trunk car?Subs and port are currently facing rearward...box is a max width of 32" so to use the 6" only option is side.
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Old 08-03-2011, 04:19 PM
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I usually prefer slot port over aero.
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