Dell STUDIO XPS Setup Manual page 20

Using Your Studio XPS Desktop
12 USB 2.0 connectors (3) — Connects
to USB devices that are connected
occasionally such as memory keys,
digital cameras, and MP3 players.
13
Line-in or microphone connector —
Connects to a microphone for voice or to
an audio cable for audio input.
14 Headphone connector — Connects
to headphones.
NOTE: To connect to a powered speaker
or sound system, use the audio out or
S/PDIF connector on the back of your
computer.
18