Rolls HR78X Digital AM/FM Tuner with XLR Output 10 FM and 10 AM presets; Retains presets when power is off RCA and XLR balanced line level outputs. Output Level control 1 space EIA 1/2 rack chassis Retains presets when power is off Stereo / Mono indicators. Indicates whether the HR78X FM Mode is operating in Stereo or Mono