Sorry to hear it's underwhelming for you. I see in their install video their settings are: "Subsonic at 25Hz, LPF at 80Hz, and Bass X with a slight bump." Are your settings similar?i saw that post, mine was not shifted out of place(already tried adjusting it and flipping the bracket around). my guess is they shipped it with the wrong bracket. their customer support seems like total crap. emailed them twice already with no response at all so i decided to bend/drill a new hole in the existing one.
its better than stock but i would say its a bit underwhelming as there isnt much wiggle room for more bass, i will have to play with it some more to give a better response.