PHONES LEVEL. Use this knob to set the volume to the Headphones Channel
PHONES PAN. Use this knob to mix between CUE and Program MIX in the Headphone channel. When all the way to the left, only channels routed to Headphones (via the CUE buttons) will be heard. When all the way to the right, only the Program mix will be heard.
SPLIT CUE. When enabled (Led bright) the PAN knob (43) will pan between Mono Cue in the left ear and mono Main Mix in the right ear.