It comes with both RCA stereo and studio-quality XLR inputs. As an added bonus, this device also supports 12V pass-through for auto power switching. So, if you use the StreamMagic app, you can ...

The design consists of on an analog ... input resistor. The negative terminal of the tube is sent to ground via a 5.1 kOhm resistor. The readout of the signal is directly from the negative terminal.