Can I get wireless speakers to add to a Bose 321 system?

SOURCE: Adding Spaekers

If it's an original 321 system (series 1) then it has an audio output on the back. (via RCA jacks) You would still need an amp or receiver to connect the speakers to.. (unless they're powered speakers)
If it's a 321 series II or 321 series III- it does not have an audio output.
If the system has a DVD tray right in the middle of the media center, then it's a series 1.
Otherwise, you'd have to get a 1/8 splitter to come from your Mac's headphone output. (still- you will need an amp/receiver or powered speakers to have both 'rooms' playing the same thing from your computer)

SOURCE: Adding Spaekers

Are you able to add speakers to the Bose GSX 321 system?

SOURCE: bose 321 system stuck at 30 volume

Is vol buttons button on unit do the same, try remote.
If not try unplug from wall wait hour and try agian, if not bose update cd..