ART MX821S, Mic / Line Mixer, With stereo outputs, 8 Mono channels, 8 Independent input channels, Controls for input levels and panning on each channel, Balanced XLR- and unbalanced jack inputs on each channel, 48 V Phantom power on each XLR input (selectable via DIP switch on the rear side), Master output with balanced jack connectors and master level control, Unbalanced prefade outputs (RCA unaffected by the master level control), and AUX bus inputs (to connect several devices together), Strong 19"" housing (1 U) with internal power supply