Apple Power Macintosh 7500 Series - Manual (Page 57)

Connecting external stereo speakers
You can take advantage of your computer’s stereo sound output by attaching
externally powered (amplified) speakers.
1 Assemble the speakers and the cable you need.
You need a cable with stereo miniplugs at each end to connect one or both
speakers to the computer. (Some speakers require a dual-plug adapter.
Others, like those shown in the next illustration, accept a single stereo
miniplug and are joined by standard speaker wires.) You can also use a cable
with RCA-style connectors.
2 Turn off the Macintosh.
3 Plug a stereo miniplug into the sound output port ( - ) on the Macintosh.
If you’re using a cable with RCA-style connectors, you should plug them into
the left and right audio output ports on the A/V panel instead.
4 Plug a stereo miniplug into the Sound In port on one of the speakers.
If the speakers take a dual-plug cable, connect both plugs.
5 Connect the speakers together with speaker wires, if necessary.
Your finished connections should look something like this:
Audio In port
Sound output port -
Externally
powered
speakers
47 Connecting Additional Equipment