PDB Passive DI Box with Input Attenuation and Ground LiftThe PDB Passive Direct Box is a rock solid, roadworthy DI for connection of the outputs of electronic musical instruments (or other audio sources) to the balanced inputs of mixer consoles and other balanced inputs. The PDB also allows connection of a music source to an instrument amplifier while simultaneously patching it to a mixer. PDB Applications: Electric guitar and bass pick up output signals The high impedance signal from a guitar or bass