Dell XPS C100J Quick Reference Manual page 15

center/LFE Use the (orange) subwoofer connector to attach a single
surround out subwoofer.
NOTE:
found in digital surround sound audio schemes, carries only
low frequency information of 80 Hz and below. The LFE
channel drives a subwoofer to provide extremely low bass
extension. Systems not using subwoofers can shunt the
LFE information to the main speakers in the surround
sound setup.
line-in Use the (blue) line-in connector to attach a
connector record/playback device such as a cassette player,
CD player, or VCR.
On computers with a sound card, use the connector on
the card.
line-out Use the (green) line-out connector to attach headphones
/headphone and speakers with integrated amplifiers.
connector
On computers with a sound card, use the connector on
the card.
microphone Use the (pink) microphone connector to attach a
connector personal computer microphone for voice or musical input
into a sound or telephony program.
side surround Use the (silver) side surround connector to attach
sound additional speakers.
connector
The LFE (Low Frequency Effects) audio channel,
Setting up Your Computer
15