Sounds like a vintage J Bass pickup with hum canceling.
Bass pickups are usually described with aggressive terms such as "amazing punch" and "thundering lows", but that's not the sound of vintage J Bass pickups. They're all about warmth, sustain, and a clean, singing tone. The Area J captures all of those qualities. It is not loud, but it has a very focussed attack, so it has power where it counts - at the center of the tone. The lows are very clear and clean, and the highs are both smooth and open-sounding. The magnet-pull has been reduced, and the included 4-conductor wiring allows both series and parallel humbucking modes.