The overview states, "the D30 Pro also doubles as a preamp and allows you to simultaneously run cables to two different destinations via a new output selection button." - Three questions; Where is this output selection button? Can it deliver audio through BOTH outputs at the same time (not just run cables)? Does the volume dial affect both outputs at the same time?
1. On the remote, button labelled "Line Out", or double click the knob on the main unit
2. Yes. You can choose between RCA, XLR, or both.
3. Yes, in preamp mode. In DAC mode the output is fixed.