HP Compaq NX7000 Reference Manual page 82

Multimedia
The notebook has 2 audio jacks:
The microphone jack 1 connects an optional monaural or
stereo microphone. If a monaural microphone is connected,
the same information is recorded on both channels.
The audio-out jack 2, sometimes called a line-out jack,
connects headphones or powered external stereo speakers.
The audio-out jack is also used to connect the audio functions
of an audio/video device such as a television or VCR. When
you connect a device to the audio-out jack:
Identifying the audio jacks
6–4
Use only a 3.5-mm plug.
The internal speakers are disabled.
Startup and Reference Guide—Part 2