08 dodge ram sub box help

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So a friend of mine wants me to build a sub box for him in his dodge ram. Can anybody help me with a design for him. He has 2 kicker cwr 12s. I took a couple of measurements and this it what I got.

12 bottom depth

5.5 top depth

15.5 height

60 width

The height can go higher but the higher you go the smaller the top depth will go down

And there's this hump that runs on the back wall. The measurements are coming from right to left. So the hump would be closer to the left side

Hump 35 to 42 width

3 by 6 is the needs to be cut out for the hump

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And those are the max measurement besides the top depth and height

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Anybody?

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Nobody??

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Joe x??