From Fishman:
With his credibility, passion, and a keen ear for the nuances that make the difference between good and great sound, Keith knows what he wants from a pickup, and how he wants it to feel under his fingers. As a passive pickup player, Keith has become accustomed to the bold way that a passive pickup responds to the initial pick attack. This, when combined with Fluence’s up-front dynamics and extended frequency response allowed Keith to finally voice a pickup free of the limitations of traditional pickup designs. When combined with the Classic Open Core neck pickup, Keith’s custom bridge pickup delivers an incredibly versatile range of tones for the modern guitarist.