The EMG J-CS Set is the ceramic-and-steel active Jazz Bass pair in standard 4-string spacing. The CS designation refers to the bobbin construction: ceramic magnets with steel pole pieces, which gives a tighter, more focused low end and a brighter, more present midrange than the alnico variants in the J family. That voicing suits modern playing styles where attack and definition matter most: fingerstyle in a dense mix, slap and pop work, rock and metal where the bass needs to cut without losing weight. The active preamp delivers a consistent output and a low-noise signal, and the EMG solderless system makes installation a screwdriver job. Within the J family the J-CS sits as the tight, ceramic-voiced option, contrasting the warmer JA (alnico) and the vintage-voiced JV. For the wider, more dynamic version of this same ceramic voicing, see the X-series JCSX Set. Runs on a single 9V battery.