ART PROMIX 3-Channel XLR Microphone Mono MixerYou need to add 3 mics to a mixer, but the mixer only has one available channel. Add the ART ProMIX. Insert a ProMIX between the mics and the mixer. Each mic channel on the ProMIX has both phantom power and low frequency cut selectable via DIP switches plus a level control. The balanced XLR line output can be connected to a mic input on the mixer and headphones or a powered monitor can be connected to the Phone Aux output. And if AC power is not