@ToddB
I plan to built a sealed chamber in the factory subwoofer location too. I don't understand what you mean with "cut a hole on the left side of where the sub is"? Did you cut any steel braces?
I think it is sufficient to put MDF with glue, silicone and a couple of screws here and there to the back, top, bottom, right and left side.
In front i will use the factory metal bracket and put a 10" sub in.
i have not measured, but estimated that i get round 20 liters, that is 0.7 cu ft.
Wich sub do you insert?
Did you put any wadding or foam material in the chamber?
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