Hum-canceling Stack for Jazz Bass with increased output and fatter tone for any 4-string Fender American Standard Jazz Bass. We took the noiseless Classic Stack and ratcheted up the tone another notch. For this pickup we increased the output and thickened up the mid-range response, which gives rock tones an added push without getting harsh. This hum-canceling pickup is designed as a drop-in replacement for Fender American Standard Jazz Bass neck position pickups.Combine with the slightly overwound Hot Stack Jazz Bass bridge pickup for a perfectly matched set.Hand made in Santa Barbara, CA, the Classic Stack for Jazz Bass uses alnico 5 rod magnets, Forbon flatwork, 4-conductor leadwire, and is vacuum wax potted for squeal free operation.