Hi I'm in the process of upgrading from my 15" Fi SSD to dual Nighshade v.2 on around 4 K rms. And I'm not so good with designing boxes so I'm asking someone with the talent to help me with a design for my new woofers. I was thinking something made for daily use tuned to 32-33 Hz. The box will be going into a Ford Mondeo hatchback. Tanks for the help