Yes, I believe it says someplace that you may not get any sound if the Loki switch is turned off.
Careful using Loki
All of a sudden I was getting extreme distortion on my playback. I was ready to tear the system apart when it occurred to me it might have something to do with the Loki connection. It was in the off position. I turned the power switch on and Voila, the distortion went away. It was set to flat, but it still affected the sound.So, keep the switch on when playing music even if you don’t use the equalizer if you don’t want an unpleasant surprise.