The 1C is Bill Bartolini's first guitar humbucker design. It features unequal windings for a clear, clean tone that tends toward single coil. It can be used in either the neck or the bridge position. It is well known for its high clarity and definition with a brigher tone in the mids.
It brings out every nuance in the inner voices of complex chords. The attack and overall quality of tone is in the region between crisp, acoustic tone and the rounded, or "diffused"