ART MX821S Rackmount Mic/Line Mixer Eight independent input channelsLevel and tone controls on each channelBalanced XLR and 1/4" unbalanced line inputs on each channel48 Volt phantom power on XLR inputs with DIP switch for each channelBalanced TRS 1/4" main output jack with master level controlRCA-type pre-fade output (not affected by master level control)RCA-type Aux buss input jack for channel expansionSolid single high rack mount chassis with built In power supply