DiMarzio Gravity Storm Neck Humbucker Pickup - F-spaced Black Gravity Storm Steve Vai Signature Pickup Black Neck, F-Spaced The Gravity Storm Steve Vai Signature Neck and Bridge Pickups are the next step in Steve Vai's pickup evolution Steve used to describe pickup sounds in terms of specific frequency responses Now he describes them as flavor and texture The flavor of The Gravity Storm Neck model is sweet and warm, but the texture has an edge to it It has the depth of a humbucker with some of the bite of a single-coil