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View Full Version : building a areo port box but need help

2loud4u
06-28-2006, 06:13 PM
Ok I am building a new box with a single 6" areo port.
The sub is a 12" mt.
The box will be 3 cubes after sub and port displacement.

Now the port has to be 17.35" correct? It will be tuned to 35hz.

Now I can not figure out how to find out what the displacement of the 6"areo that is 17.35" long.

Is there a online calculator?

PatFitz9
06-28-2006, 06:16 PM
www.psp-inc.com they don't sell the 6in ports, but you can use the calculator

edit, i didn't read the post right... are you just asking the displacement of the port? pi*r^2 times the length should do it.

2loud4u
06-28-2006, 06:37 PM
ya that is the calculator I used.

2loud4u
06-28-2006, 06:54 PM
I **** at math lol well I will see if i can figure it out.

Ok is this right

6" aero x 17.35" long = displacement of 0.28 cubic feet.
If not I will try again.

xluben
06-28-2006, 08:32 PM
l*pi*r^2

(17.35)*(3.14)*(6/2)^2

= 490.56 in^3 / 1728 [in^3/ft^3]

= 0.284 ft^3

Look right to me!

2loud4u
06-28-2006, 10:02 PM
Kool thanks.

PatFitz9
06-28-2006, 11:03 PM
thats what i said to do :P

IgnoreMe
07-05-2006, 01:17 PM
umm. isnt radius, half the diameter? meaning on a 6" diameter aero port...the radius would be 3"...

Trixter
07-05-2006, 01:25 PM
yeah just use the (pi R^2) x L formula to find the volume of the port. don't wory about the little extra due to the flared ends...won't account for much worth figuring.