The Line Pad-Z is a passive audio pad designed to interface Line level audio down to Mic level with the correct impedances. Input impedance is 10k ohms, and output impedance is 150 ohms similar to a low impedance microphone so that you can interface a Line device, such as a DAW or other outboard gear, to a microphone preamplifier. Level loss is approximately -36dB and the signal is balanced throughout.