The JAX Set is based off EMG's original J, but uses radiused Alnico V magnets instead of ceramic and our X Series preamp. This creates a tone that is warm and open for a more vintage sound with a broad frequency range and added dynamic response and feel. The JAX provides bass players with natural presence, powerful lows, and expansive midrange. With our X Series preamp on-board, this pickups set truly bridges the gap between passive and active tone - giving players the best of both worlds. Whether you play fretted or fretless you'll get an incredibly full sound with these bass pickups.In the BoxPackage Includes EMG's exclusive Solderless Install System:2 25k volume pot1 25k active tone pot (VLPF)1 battery bus1 stereo output jack4 pair mounting screws2 pickup cables2 connect cables1 output cable1 battery cable.