This is my first post and project I have a great set of Magnat speakers an 8", 4" and tweeter the sounded amazing in my 81 BMW M3 sadly I had to leave to leave the car in Germany when I left the military. I figured I could easily hold a box for them and I was soooo wrong the more research I do the more confused I get so to start for the box 16 x 12 x 10 ported ( guessing volume as I don't have spec sheet) figured size using the golden ratio I have no clue for the 4" driver I am planing on using 1.5" MDF any help would be greatly appreciated!