[. . . ] [. . . ] This ensures that the unit can be used in the unbalanced mode on one or both channels without interference between the channels. It is self-adjusting to the line voltage and therefore a voltage selector is not provided. the intensity of the light depends on the current in the corresponding microphone circuit. The OC output of the two feeding channels is permanently short circuit protected The output current is limited to appx. [. . . ] [. . . ]