Sony VGN-FW170J - Manual (Page 73)

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Using Peripheral Devices
Connecting External Speakers
You can enhance the sound quality of your computer by connecting external speakers (not supplied).
To connect external speakers
1 Plug the speaker cable (1) (not supplied) into the headphones jack (2) i .
2 Plug the other end of the speaker cable to the external speaker (3).
3 Turn down the volume of the speakers before you turn them on.
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Make sure your speakers are designed for computer use.
!
Do not place floppy disks on the speakers; their magnetic field may damage the data on the disks.