The EMG J-X active bass pickup set features ceramic magnets powered by a newly designed preamp. It has characteristic Jazz Bass tone, but due to EMG"s custom radiused ceramic bar magnet, and the very low ratio of resistance to inductance, the tone has a modern, tight midrange punch, and superior dynamic high-end responseall with less noise and more signal. So whether you play fretted or fretless bass, playing live or in the studio, the EMG bass pickup gives you incredibly full sound. Give it a try and experience why the "X" factor is exciting bass players all around the world. The complete replacement pickup package includes EMG"s exclusive solderless Quik-Connect system; control set including 2 volume controls, master active tone control, output jack, battery clip, and adjustment screws. EMG"s exclusive Solderless Quik-Connect system Includes: Split shaft volume/active tone control set Output jack Battery clip set Screws & springs