Apple Macintosh LC 630 - Manual (Page 41)

5 Connect the speakers together with speaker wires, if necessary.
6 Turn on the computer.
You hear the computer’s sound through the external speakers.
Note: To control the volume of your external speakers, use the volume button
on the front of the computer. If you are playing an audio compact disc (CD),
you may also need to adjust the volume control in the program you’re using to
play CDs. For more information on sound and playing audio CDs, see the
“Sound” topic of Macintosh Guide, available in the Guide (h) menu.
33 Connecting Additional Equipment