Can raising the tuning of a box gain db (4 sundown zv3 18s)

[mrlovethatbass21]

Yea you did lol, but I think it should get louder. We shall see. I'm going to use the sonotubes but fiberglass them to make them stronger and flare them on the outside, this is only if I can't get ahold of Derrick off of caco who sells the green pvc ones that are already made up