A powerful pre-amplifier/D.I. circuit is integrated into a stomp box. By using the OBP-3 preamplifier circuit and Adaptive Gain Shaping circuitry (AGS), you can call up the necessary gain and EQ whenever you need it with a single foot switch. You can customize it to suit your taste, from modern slap bass to vintage or overdrive sounds. Power supply: 18V Optional option: AC adapter
