ur sub jus moves in the opposite direction, jus see which sounds better
usually if u invert ur sub in ur box (u can see the back of the magnet and front of sub is hidden by facing in the box) then u want 2 reverse the polarity
I think what he means is by this wiring diagram. I might be wrong. Like having the positive come from the top coil whereas the neative comes from the bottom or vis versa.