Seymour Duncan SSL-5 RW/RP Custom Staggered Single-Coil Middle Pickup
The "RW/RP" in the name of the Seymour Duncan SSL-5 RW/RP Custom Staggered Single-Coil Middle Pickup stands for Reverse Wind/Reverse Polarity. This refers to the practice originated at Seymour Duncan in the late '70s of reversing the winding direction and magnetic polarity of one single coil pickup from a 2- or 3-pickup guitar. With this arrangement, hum cancellation is achieved when 2 pickups are used together. Reverse-wound, reverse-polarity middle pickups are for hum canceling in positions 2 and 4 on a 5-way pickup selector switch.