X SERIES Active 4-String Precision Bass retrofit Pickup, Black. The PX provides increased headroom giving the voicing an organic and open tone while still maintaining the clarity and response that EMG’s are renowned for. Featuring ceramic magnets coupled with short, squat coils and powered by a newly designed preamp, the tone is endowed with high-end articulation, warmth, and incredible low end punch, all with less noise and more signal. Countless pros use it because they find it has a natural presence, powerful lows, punchy midrange, and superior definition. The PX covers a wide sonic palette of classic and modern bass sounds. Give it a try and experience why the "X" factor is exciting players all around the world. Package Includes: EMG's exclusive Solderless Install System (Patent pending); solid shaft volume/active tone control set, output jack, battery clip set, adjustment screws.