The PowerBook G4 (15-inch FW 800) computer has an audio line-in port, headphone port, integrated microphone, two stereo speakers, and a midrange-enhancing speaker.
The audio line-in port is a stereo 3.5 mm mini-phono jack that allows the connection of a line-level microphone or other audio equipment.
The headphone port also uses a 3.5 mm mini-phono jack and provides enough current to drive a pair of low-impedance headphones. It can support external speakers (which may require external power) or other sound output devices.
The integrated microphone is located underneath the left speaker grill near the Tab key.
The PowerBook G4 (15-inch FW 800) computer includes two stereo speakers, located beneath the speaker grills on each side of the keyboard.
The PowerBook G4 (15-inch FW 800) computer also has a midrange-enhancing speaker, designed to produce a separate channel of midrange sound. The midrange speaker is located underneath and to the left of the space bar. There are no settings in the Sound pane of System Preferences to adjust the midrange speaker independently. Increasing and decreasing the system volume changes both the stereo speakers and the midrange speaker at the same time.