Seymour Duncan stc2p 2band for passive pickups

11993-02 we offer high-headroom, low-noise, 2-band and 3-band active onboard eq preamps for use with both active and passive pickups. each active bass preamp comes with high-quality potentiometers on a pre-wired harness, battery clip, and knurled black dome-style knobs. (volume/slap switch, blend, and concentric bass and treble controls for stc-2p and stc-2a) or four control knobs (stc-3a and stc-3p) and a single 9v battery in the control cavity. two 9v batteries can be wired together in series for added headroom. we include all necessary mounting hardware: high-quality potentiometers on a pre-wired harness, battery clip, and knurled black dome-style knobs.