This is the box from the outside...to protect it from the rain i bought some herculiner bed liner kit for around 80 bucks and bedlined my whole truck first then the box.
Make sure u make the box fit snug under the railing of the bed it will prevent water from leaking in and you can seal it from the inside out....i had to force my box in by kicking it from the back haha
This is how it looks like from the inside..the box is 15 inches deep but i recessed the face 2.75 inchs so that i can seal the box from the inside with silicone.
the port tuned to 32 hertz
i was short on cash so to seal the bed to the cab i bought some marine vinyl and pinch weld then i used some abs cement and put a thick coaton it,but i suggest buying something called Accordion boot.it is made specifically for this type of thing just google "accordion boot" and there is website that sells it by the foot.