Apple Workgroup Server 9150/120 - Manual (Page 136)

About your server’s sound ports
Your server can play and record stereo sound from a variety of sources. To
provide or reproduce stereo sound, you can connect audio devices to the line
input or sound input ports, and to the sound output port on the server. You can
also use the server’s internal CD-ROM drive to play audio compact discs (CDs).
The following figure shows where the line input, sound input, and sound
output ports are located on your Workgroup Server 9150.
The server’s line input ports accepts an audio connector known as a phono
(RCA-type) plug. The server’s sound ports accept an audio connector known
as a stereo miniplug. This connector is the type used on headphones for a
personal tape player, for example. If your equipment uses a different type of
connector, you can purchase an adapter at an electronics supply store.
Stereo miniplug
Sound input port
Sound output port
Line input ports
120 Appendix D / Using Stereo Audio