Custom Shop ’60s Jazz Bass®. [Sonic Characteristics] Patterned after vintage pickups but are overwound for more punch, midrange, bass and output. [Construction] These pickups are constructed with Special Alnico 5 magnets and Formvar magnet wire. [Bridge] DC Resistance: 7.4K, Inductance: 3.25 Henries. [Neck] DC Resistance: 7.1K, Inductance: 3.18 Henries.