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kodak314
11-05-2008, 09:29 PM
ill be building a new box pretty soon and want to get my math rite b4 i move forward.

ok, trying to do a 4.5 cubes( or larger) tuned to 38 (using a 6" aero). With a 15" Hdc3 on a sd 1500d in a trunk.

the max dimensions im tryin to do are: 33w x 17h x 20d.


33 - 1.5 = 31.5
17 - 1.5 = 15.5
20- 1.5 = 18.5

31.5 x 15.5 x 18.5 = 9032.625 / 1728 = 5.23

5.23 - .23 (sub disp.) - port disp.(dont know yet but gon say .17) =

5.23 - .23 -.17 = 4.83 cubes

still need to figure out port displacement

how does this look??

TIeclipseMOJO
11-05-2008, 09:32 PM
math is correct, just your port length youre unsure about?

kodak314
11-05-2008, 09:48 PM
well i can go to psp-inc and get the length. just not sure on the displacement.

TIeclipseMOJO
11-05-2008, 09:51 PM
port length is going to be adjustable to your tuning. the volume of the port is the area times length. the area is (PI radius squared...) so 3.14 times 3 inches times 3 inches... 28.26 square inches is the area. then multiply that by length and you have a volume in cubic inches. divide by 1728 and you have the volume in cubic feet

kodak314
11-05-2008, 09:56 PM
aight thanks