What are series and parallel wiring? | Seymour Duncan With parallel wiring the individual coils are connected to each other at both ends and current flows through both coils at the same time. Pickups wired in parallel are brighter sounding and have considerably less output than an identical pickup wired in series. JBE on Series/Parallel Wiring | JBE Pickups However, the technical concepts of series and parallel wiring are the consistent across applications. This blog will describe what series/parallel wiring is and how we can use it when wiring pickups in our guitars and basses, or when seeking other tones from our pickups. Parallel wiring is the usual way of connecting pickups in a guitar or bass.