Vintage-correct Construction for Vintage-correct Tone The Seymour Duncan SJB-1 Vintage Jazz Bass pickup set is designed from the ground up to replicate the responsive feel and iconic tone of the early '60s Jazz Bass. This is a drop-in replacement for a wide variety of J-bass-style instruments, and it delivers a rich, smooth tone with an impressive punch. Handmade by the master craftsman at Seymour Duncan, the SJB-1 Vintage Jazz Bass pickup set features a vintage-correct construction with Alnico V magnets and period-correct wire. Finally, this set's neck pickup features a reverse-wound reverse-polarity construction to buck the hum when both pickups are engaged.Period-correct construction for superior tone and responsiveness Since 1978, Seymour Duncan has been hand-building all of their vintage Fender-style single-coil pickups with the perfect color and thickness of Forbon flatwork, along with the vintage-correct hand-ground Alnico V rod magnets. Every pickup comes complete with waxed and tinned cloth push-back