DiMarzio DP159 Steve Vai Signature Evolution Bridge Pickup (Black with Black Poles)The Evolution Neck and Bridge humbuckers are the result of two years of research to come up with the right sound for a very demanding player: Steve Vai and his Ibanez Jems. Both pickups are designed for maximum impact and power. The neck pickup is fat, punchy and loud. The bridge pickup is tight, aggressive and louder. Both pickups have DiMarzio's patented dual resonance configuration to reproduce more harmonic overtones than conventional humbuckers.