Basslines SMB-4DS Bassline Pickup and Tone Circuit Powerful 4-string, ceramic magnet, hum-canceling pickup 3-band tone circuit designed specially for mid- and late-'70s Stingrays Richly articulated bottom, major midrange, and lots of treble Proprietary Slap Switch has a special EQ contour made just for slap-style playing Your Music Man plays great, now make it sound great with this powerful 4- or 5-string ceramic magnet pickup and special 3-band Tone Circuit designed specially to bring out the best tone of the mid- and late-'70s Stingrays