DiMarzio DP287F Steve Vai Signature UtoPIA Neck Humbucker Pickup (Purple)Using the Evolution Neck as the basic platform, the UtoPIA Neck was designed to focus more on the low end response of the guitar while adding thickness and body to the top end. The challenge was to still deliver the harmonics for which the Evolution is known. Upper mid range frequencies were also dialed back to produce a less aggressive attack and provide more control. The UtoPIA Neck boasts a big, bold low end and thick top end. A perfect choice for