I have a 10 in my boat and found that I at first stuffed it too full with baffle material. It's in a QLogic 10 inch box. You can look up the specs online to determine the volume of the box, but I think's it's 1 cubic foot.
Anyway, it was muffled and didn't sound so good. I took out most of the baffle material, and use only 1 layer of the material now. I used spray adhesive to stick it to the walls on the inside of the box. all around all 5 exposed sides.
It's now very punchy and clear. It's also not ported. It's sealed. I'm no expert, but that was my experience.