My Event Opal monitors are connected via XLR cables to Analog Outputs 1/2 :-).

My question is: What Setting do I have to choose for the Analog Outputs 1/2?
Hi Gain?
+4 dBu?
-10 dBV?

Note: The Opal Input sensitivity for 0dBu is 0.755V/ms.
The Opal has a "Level" knob what allows for modification of the input sensitivity, from -6dB to +6dB in regards to the reference sensitivity of 0.775v RMS. The default setting is 0.