So I'm trying to design a new box for my SDC2.5 12". This is my first time using SketchUp so bear with me. These dimensions that I have give me around 2.8 Cubes Internally without taking in the port displacement. Using the 12 volt slot port calculator, it gave me that I should have a port something around 9.5" X 1.5" x 7.5" to achieve a 36hz tuning.
So, am I just totally off with everything? Or do I just need to tweak a few things.
* I want to downfire the sub.