Behringer DJX900USB - Powering On and Audio Input; Gain Adjustment and Level Setting

2. With the MASTER fader and BOOTH knob all the way down, turn your mixer on.
3. Turn on your other equipment and begin playing audio into the mixer.
4. Raise the MASTER fader and MONITOR LEVEL knob to desired level.
5. Raise the GAIN knob on each channel that is receiving a signal so that the yellow CHANNEL VU METER LEDs
light. If the red CLIP LED lights, lower the GAIN knob.