Dell Inpsiron 560 (Late 2009) - Manual (Page 329)

Ports
329
Audio Ports
NOTE:
The LFE (Low Frequency Effects) Audio channel, 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.
Port Signal Connection
1 line-in connector Use the (blue) line-in connector to attach a
record/playback device such as a cassette
player, CD player, or VCR.
On computers with a sound card, use the
connector on the card.
2 lineout/ headphone
connector Use the (green) line-out connector to attach
headphones and speakers with integrated
amplifiers.
3 microphone
connector Use the (pink) microphone connector to
attach a personal computer microphone for
voice or musical input into a sound or
telephony program.
4 side surround
sound connector Use the (silver) side surround connector to
attach additional speakers.
5 rear surround out Use the (black) surround sound connector to
attach multichannel-capable speakers.
6 center/LFE
surround out Use the (orange) subwoofer connector to
attach a single subwoofer.
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