Sonos CONNECT:AMP User Manual Using line-in


You can connect an external source like a portable music player to any Sonos player that has a line-in connection. The source will be automatically detected as soon as you plug it in.

To a portable music player: Use a 1/8 inch mini-stereo to RCA audio cable—plug the mini-stereo end into the portable device and the RCA end into the Audio In connection on the Sonos player.

To an external source like a CD player: Plug a standard RCA cable into the analog Audio In connections on the back of your Sonos player.

Playing music

Using a mobile device: Touch Line-In from the Menu and choose the line-in device.

Using a Mac or PC: Choose Line-In from the MUSIC pane. Click next to the music source and choose Play Now.

Changing the settings

Using a mobile device: Go to Settings and choose Room Settings. Choose the Sonos speaker the source is connected to and touch Line-In.

Using a Mac or PC: Go to Manage -> Settings (PC) or Sonos -> Preferences -> Room Settings (Mac). Choose the Sonos speaker the source is connected to from the Room Settings for drop-down and click the Line-In tab.


  • Line-In Source Name: Choose a name from the list.

  • Line-In Source Level: A default (typical) line-in source level is automatically assigned for each source. If the volume sounds too low, you can choose a higher line level. (You may experience clipping at higher volume levels if you set the level too high.)

  • Autoplay Room: Choose the room you want this line-in source to play in whenever it’s connected to Sonos.

  • Include Grouped Rooms: Turn on if you want the line-in source to play in rooms that are grouped with the autoplay room.

  • Use Autoplay Volume: Click the Use Autoplay Volume box if you want to use the external source to adjust the volume in the autoplay room. Use the slider to set a default volume.

Line-in encoding settings

When you have line-in music sources attached to a Sonos product, line-in encoding determines how Sonos will encode the data coming in from these sources. Your Sonos system defaults to automatic in order to provide the optimal playback experience. Sonos recommends you do not change this default. However, if you decide to make a change, we recommend the following usage guidelines:

Use Uncompressed if:

  • You want optimal performance with home theaters.

  • You want to produce the highest quality sound for your Sonos system (this selection requires more network bandwidth than compressed audio.)

Use Compressed if:

  • You are connecting more than 4 rooms wirelessly.

  • You are in an environment with heavy wireless interference and are experiencing dropouts.

To change the line-in encoding setting, select one of the following options:

  • Using the Sonos app on a mobile device: From Settings, select Advanced Settings -> Audio Compression.

  • Using the Sonos app on a PC: Select Manage -> Settings -> Advanced.

  • Using the Sonos app on a Mac: Select Sonos -> Preferences -> Advanced.

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