Apple macintosh performa 6200cd series User Manual

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. 

The random-access memory (RAM) in your computer can be expanded.
Installing additional RAM adds more memory chips to your computer and
expands its capabilities. The Technical Information booklet that came with
your computer describes how much additional memory can be installed in
your Macintosh.

This section contains information for people whose computers are connected
to other computers through a local area network. (Using a modem is not the
same as being connected to a local area network. If you have an internal
modem, you do not need an Ethernet card.)

To avoid damage to your computer, Apple recommends that

only an Apple-certified technician install additional RAM. Consult the
service and support information that came with your computer for
instructions on how to contact an Apple-authorized service provider or
Apple for service. If you attempt to install additional RAM yourself, any
damage you may cause to your equipment will not be covered by the
limited warranty on your computer. See an Apple-authorized dealer or
service provider for information about this or any other warranty
question.

Connecting Additional Equipment