Dell Inspiron 20 (3048, Early 2014) - Manual (Page 59)

Audio
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59
Ports and Connectors
Audio
Audio connectors allow you to connect speakers, headphones,
microphones, sound systems, amplifiers, or TVs audio output.
NOTE: Your computer may not support all the audio ports.
For information on the ports available on your computer, see the
Quick Start Guide that shipped with your computer or Specifications
at dell.com/support.
Types of Audio Ports
Headphone port — Connect headphones, powered
speaker, or sound system.
Microphone port — Connect external microphone for
voice or sound input.
Line-in port — Connect a recording/playback device such
as a cassette player, CD player, or VCR.
Line-out port — Connect headphones or speakers that
have an integrated amplifier.
Rear-surround out port — Connect multi‑channel
capable speakers.
Center/LFE surround out — Connect a single subwoofer.
NOTE: The Low Frequency Effects (LFE) audio channel,
found in digital surround sound audio schemes, carries
only frequency information (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.