signal going into channel 1. For the USB 2 jack, you can output either the Master output signal, or a direct output of the signal going into channel 2. The direct output settings are
11.AC In: This mixer is designed to work with the power supply assembly that comes with the unit. While the power is switched off, plug the power supply into the mixer first, then plug it into the outlet.
12.Power Switch: Use this switch to turn on the mixer after all input devices are already connected to prevent damage to your equipment. Turn the mixer on before you turn on amplifiers and turn of amplifiers before you turn off the mixer.