slot port for a trapezoid

[nosaj070 10+ year member]

Heres the math...

Port is 3 X 10 X 27.5

Add in 3/4 MDF

4.5X11.5X27.5=1423.125 cu inches

1423/1728=.82356

Gross Box Vol=2.87 - .36= 2.51 Net Volume

2.51-.82356= 1.686 Cu Ft.

 

[7MM SHEE 10+ year member]

ok i understand that, but now i need to get the interior volume more so i can have 2.0cuft without port right, is that a big enuff port for 4 of them, just asking.

 

[nosaj070 10+ year member]

Yeah, in reality, you could probably get by with less port area, which would mean the length is shorter, which means it takes up less volume, but it may end up being substantial, and you are not going to want any port noise in a truck cab.

 

[7MM SHEE 10+ year member]

doesnt the length determine the tuning frequency. i will try to get something drawn up and posted under here and see if everything looks correct before i start cuttting and constructing the box, thanks for the help,

 

[nosaj070 10+ year member]

doesnt the length determine the tuning frequency. i will try to get something drawn up and posted under here and see if everything looks correct before i start cuttting and constructing the box, thanks for the help,

The length, the port area, and the volume of hte box influence tuning frequency.

 

[bcarpenterfhl 10+ year member]

4 three inch ports will be sufficient and easier to use, check your PM.