WinISD Pro

[Jimmyd_442]

I'm trying to build a box for a 15" Alpine SWR 1541

I'm using winisd to find the port length.
Could somebody please tell me how to read the graph. The istructions don't really give a good discription.

[IgnoreMe]

go to my tutorial in my sig and use that formula to find your port length. winisd isnt accurate in calculating port lenght. good luck