Rolls MX122 MiniMix Pro The MX122 is a five channel audio mixer which combines a single microphone signal with four stereo instrument or line level signals. The XLR Microphone input has a trim control and switchable +12 VDC phantom power available. The unit is ideal for musicians needing to mix stereo keyboards and sound modules with a single microphone. FEATURES: 1 XLR balanced Mic Input with rear panel Trim control. +12VDC Phantom Power. 4 individual 1/4" Stereo Inputs. Balanced 1/4" TRS Outputs. Balance control on each channel (Pan on the Mic channel). Headphone / Auxiliary Outputs. External Power Supply included for low noise operation.