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NYCJEEP
06-30-2008, 06:10 PM
Anyone here have any experience using a single 6" port in place of two 4" ports for a standard ported enclosure? I am considering it for my 2 IDMAX 12s...

KCha
06-30-2008, 06:13 PM
(1) 6" = 28.26 in^2
(2) 4" = 25.12in^2

All depends on what you need/size of box. Some people say the size of the box doesn't matter on port area, but to each their own I guess.
Also, remember aeroports allow more movement of air the slot ports -- so less is needed.

BEAVER.989
06-30-2008, 06:15 PM
a single 6" port has twice the port velocity of two 4" ports. port noise could be a factor.

NYCJEEP
06-30-2008, 06:50 PM
So you think a single 6" port would be more susceptible to port noise compared to two 4" ports? The only reason I want to use a 6" is because it would fit better between my 2 subs...I only have 40" wide to play with and right now the 4" ports are crammed in between...

BEAVER.989
06-30-2008, 06:54 PM
A 6" port has twice the velocity of two 4" ports. That's a fact. Chances are you will introduce a substantial amount of port noise. If it's in a trunk, who cares? But if it's sharing the same airspace as you are...

NYCJEEP
06-30-2008, 07:57 PM
I thought less port area is more prone to port noise? I would assume there is a limit to how big you can go before encountering problems or down sides...

BEAVER.989
06-30-2008, 08:02 PM
I thought less port area is more prone to port noise? I would assume there is a limit to how big you can go before encountering problems or down sides...

You won't have less port area if you're doubling the amount of ports.

PSturmer
06-30-2008, 08:21 PM
So you think a single 6" port would be more susceptible to port noise compared to two 4" ports? The only reason I want to use a 6" is because it would fit better between my 2 subs...I only have 40" wide to play with and right now the 4" ports are crammed in between...

no less chance. more port area and a better perimeter vs. area ratio. people have done this before and have seen gains. its more about the space you are working with.

AudioXtremes
06-30-2008, 08:23 PM
God so much bad info on here from people who think they know.

A 6" port has less surface drag and is more efficient. A 6" aero will have less noise than 2 4" aeros cause less surface drag on the air and a larger diameter opening will reduce chuffing.