L-shaped port length

[Deeznutz]

I need a better understanding of a L-shaped port measurement. I read you measure down the center of the port.

Here is what I have.

I need a 100sq in port area x's 18" length for the new enclosure. I'm making a rectangular port 7.0625"(width) x 14.125"(length) to get there.

The box is 17.5" tall including a double baffle. I did a mock up of the port. I was able to measure from the top of the box down to the middle of the horizontal port portion. Straight down is 13.875". Than across to the end I measured the rest of the way to get the needed 18". Just need to know if I did it right???

Here is what I want it to look like. Ofcourse I do not know the overall length of the port measurement.

This is what I want to build exactly.

Any input would be greatly appreciated.

Thanks guys,

-Frank

[Broke_Audio_Addict]

Yes you measured the length the proper way.