Acer Aspire T600 - Manual (Page 9)

5
English
Speakers
For systems bundled with speakers, before powering on the system,
connect the speaker cable to the audio-out (external speaker) port on
the back panel of the system.
For more detailed information about the speakers, please refer to the
included operating instructions.
Note: Speakers are optional and the appearance might be
different, depending on the actual product.