I don't have the dimensions given by the instructions. I just need to get somewhat of an idea of how big or small to make it. I have a single cab dodge, so i have to make it small enough to fit behind my seats.
The dimensions given by the instructions are what you need.
What brand and model is the sub. Every sub will not be able to work in the same size box and it's real important to know what to do when you're trying to find a box.