Check the listing for details. Stewart Electronics ADB-1 Active Direct Box Pro Audio DI Phantom/Batt. Condition: Used. Listed at 65.00 USD. Overview — The Stewart Electronics ADB-1 is a high-performance active direct box designed for both studio and live sound applications. It serves as a transparent interface between high-impedance instruments or speaker-level signals and low-impedance balanced microphone inputs, ensuring signal integrity over long cable runs. — Key Features — • Dual Power Options: Can be powered via 48V phantom power from a mixing console or by an internal 9V battery. • Input Versatility: Includes an Instrument/Speaker ( INST./SPKR. ) toggle switch to accommodate different signal levels. • Ground Isolation: Features a switchable Ground Lift ( LIFT/GND ) to help eliminate hum and buzz caused by ground loops. • Connectivity: Equipped with 1/4" Unbalanced Input and Output (Thru) jacks, and a balanced XLR….