PreSonus Central Station Plus Studio Control Center w/ Remote Control and 1 Year Free Extended Warranty 3 sets of stereo analog inputs let you switch between sources 2 sets of S/PDIF digital inputs (coax and optical) 3 sets of stereo speaker outputs with: Speaker Select switches; Recessed trim pot for each speaker output Cue section with: Input-select switch; Output-level control Main section with: Input-select switch; Aux-input level control; Output-level control