It 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. Ground lift: switchable input attenuation: switchable (0d - B, -20d - B, -40d - B). Instrument Input: 50k Ohm. Output jack: 600 Ohm XLR. Output jack parallel link jack: 50k Ohm. Frequency response: 10Hz - 50KHz and plus,/- 0.5d - B @ and plus, 4d - Bu. Dimensions: 3" x 5" x 2".