Apple Macintosh 6500 - Manual (Page 47)

About your computer’s sound ports and features
The Sound input port is marked with an icon of a microphone (≈). The
Sound output port is marked with an icon of a speaker (-). Your computer’s
built-in speaker functions as a subwoofer (a loudspeaker that delivers enhanced
bass sound) when external speakers or a monitor with built-in speakers is
attached. For more information on the subwoofer, see “Using the Built-in
Subwoofer” later in this section. For more information on the sound input
and sound output ports, see the section “Connecting Audio Equipment.”
Subwoofer balance control Volume control button
Headphone jack Internal speaker
(functions as a subwoofer when
external speakers or a monitor
with built-in speakers is attached) Sound input port
Sound output port
47 Expanding Your Computer and Using Its Special Features