Sonos Wireless HiFi System Setup Manual page 28

26 Sonos Setup
Connecting another line-in source to your Sonos system
Connect the audio line-in cable provided with your Sonos product (or a standard RCA cable) from the Audio out connection(s)
on the external source to the analog Audio In connection(s) on the back of your Sonos product. The source device will
automatically be detected and displayed on the Sonos controller.