eMachines Desktop User's Guide
Page 15
... user configurable for one of the following: Stereo in /side speaker jack (blue plug) -ORSide speaker jack ESATA port (optional) Serial port (optional) HDMI port (optional) ESATA HDMI Description Plug your center speaker and subwoofer into this jack. Enables fast external disk access. Plug your rear right and left and right speakers...
... user configurable for one of the following: Stereo in /side speaker jack (blue plug) -ORSide speaker jack ESATA port (optional) Serial port (optional) HDMI port (optional) ESATA HDMI Description Plug your center speaker and subwoofer into this jack. Enables fast external disk access. Plug your rear right and left and right speakers...