IBM 6345, 2194, 2193 manual 8IBM Personal Computer User Guide

•You can also plug headphones into the line-out jack on the back of the system unit. This is the same jack to which the external speakers connect. You must disconnect your speakers to use this jack with your headphones.

If you plug your headphones into the line-out jack on the back of the system unit, the headphones will pick up all sounds generated from your computer and any external devices connected to the computer, such as a MIDI (musical) keyboard. The headphones will also pick up sound coming from a CD in the CD-ROM drive.

Note:

When your headphones are plugged into the line-out jack on the back of the system unit, you must control the headphone volume through the volume-control program on your computer. You cannot control the headphone volume from the volume control on the CD-ROM drive.

When using the line-out jack, some sounds, such as the error-code beeps generated by the power-on self-test (POST), might not be audible through the headphones or external speakers.

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