The Shadow Double Bass Preamp & Pickup System combines a highly responsive bridge pickup and SJ2500 transducer placed under the fingerboard for enhanced slap tone and offers a dual-channel preamp. The bridge channel includes adjustable gain, bass, mid, presence, and volume controls, as well as sub-sonic filter and pre-shape switches. The fingerboard channel includes gain, treble, volume, and lo-cut controls, with a 4kHz/8kHz switchable roll-off frequency, phase switch, chromatic auto tuner, and 9v DC output for ultimate control and convenience.