The Single Source Input typically resides at the entertainment center and is connected to the enclosure mounted Audio Distribution Module using a single Category 5 cable run. This Single Source Input requires line level output from the audio source being distributed. If your receiver does not have a dedicated line level or preamp output, use the tape monitor output. The Single Source Input provides RCA jacks for audio source equipment connection. The line level audio signal is sent to the Audio Distribution Module over the Category 5 cable. IR signals that are transmitted to any Category 5 Audio Volume Control within the system are directed to source equipment using IR emitter cables (F7425) that plug into the three 2.5mm jacks on the Single Source Input.