AV In1 is used for playback of audio/video from an external device connected to
the unit through a 3.5mm jack located on the font panel. The unit can increase or
decrease the volume of the connected device. All other controls are done on the
connected device.
AV In2 is used for playback of audio/video from an external device connected
through RCA connectors located on the back of the unit. The unit can increase or
decrease the volume of the connected device. All other controls are done on the
connected device.