Seymour Duncan Active Bass Preamp System (STC-2A) (2-Band for Active Pickups)We offer a high headroom, low noise, 2 band (STC 2A) active onboard EQ preamp for use with active pickups. Each active bass preamp comes with high quality potentiometers on a pre wired harness, battery clip, and knurled black dome style knobs. Seymour Duncan Tone Circuits will add a tremendous amount of on board tonal versatility to any dual pickup bass. Our design enables players to boost or cut specifically focused frequencies in order to achieve