The only safe and predictable way to provide direct feeds from instruments or other sources is by using a Direct Box utilizing an input amplifier driving an output transformer. The PDB-100 is a passive direct box and durable. This unit can be used as the connection of the outputs of music instruments (or other applications) to the balanced inputs of mixer consoles. Besides, the PDB-100 allows connection of a music source to an instrument amplifier while patching it to a mixer at the same time via the PDB-100 Direct Box.