ART MX821S 8 Channel Rackmount Mic and Line MixerThe ART MX821S is a versatile rack mount mixer combining eight independent input channels into a stereo line level output. Each input channel accepts a balanced XLR microphone input or unbalanced 1 4 inch TS line level signal and provides independent level and pan controls. +48 Volt phantom power may be independently selected on each microphone input. A master level control adjusts the signal output to the low impedance balanced 1 4 inch TRS jacks.