Inside the EMG-89 guitar pickup are both single and dual-coil pickups, each with its own output.
The single-coil mode is an Alnico-loaded stacked EMG-SA. The dual-coil mode consists of two Alnico-loaded
coils opposite one another, creating a pickup similar to the EMG-85. A push/pull volume or tone enables you to
switch from the clarity of a single-coil to the fatness of a humbucking. Virtually noiseless in both modes. The
EMG-89 humbucker's separate outputs give you option to utilize EMG tone enhancing accessory circuits on
either pickup output.

EMG EMG-89 Split Coil Humbucking Active Guitar Pickup Specifications: