80^2 inches to much for 2 12s?

[bunkerking09 10+ year member]

don't have room to do the maze of doom...this sux

 

[mcsoul 10+ year member]

want me to model up some 6" areos?

 

[thorshammer1 10+ year member]

Stretch the port wider if you can. That should bring the length down.

 

[mcsoul 10+ year member]

In 4.2 cubes net, you only need two 6" x 24.65" areo ports to get the same mach rating

as 100sq" of port area (5x20). Both settups yield .03 mach.

Make sure the ports are internally like 6- 8" away from the back wall.

 

[bunkerking09 10+ year member]

You guys don't understand, I can't do aeros. What kind of port can I make to keep it less than 20 inches long?

 

[mcsoul 10+ year member]

2.5" x 20" needs 17.44" of depth

3x20" needs 22.39"

Carefull about getting to close to the back wall, it can start

to count as additional port depth.

 

[mcsoul 10+ year member]

2.75 x 20" needs 19.92"

 

[bunkerking09 10+ year member]

2.5" x 20" needs 17.44" of depth
3x20" needs 22.39"

Carefull about getting to close to the back wall, it can start

to count as additional port depth.

60 inches of port doesn't seem like enough though...

 

[bunkerking09 10+ year member]

DD's website said that at 4.25 i should have 72^2 of port 16 long to tune to 40 hz. I'll make it an even 20 and take whatever that tunes me at.

 

[SPY 5,000+ posts]

4.2 ft^3 with 72 in^2 of port 20" long is 42.16 according to WinISD

Post up the dimensions you have to work with and subs if you want more help.

 

[bunkerking09 10+ year member]

4.2 ft^3 with 72 in^2 of port 20" long is 42.16 according to WinISD

Post up the dimensions you have to work with and subs if you want more help.

its a really weird box to explain. lol