Can a PC's audio be directed to a SLIMP3?

Hi All,

I've got a temporary PC set up as a TV, for some Christmas family watching (for when we don't want to put the projector on).

For the audio, I've currently got it connected to a blutooth speaker. However, there's a sound lag, which I assume is caused by the bluetooth.

In the same room, there's a SLIMP3 connected to some speakers.

The low-tech solution is to add a splitter to the speakers and to have a cable from the PC output to the speakers.

But I was wondering if there was anyway for the PC audio to be sent to the SLIMP3 via that LAN cables that they are both connected to.

Is this possible? Or should I just do the low-tech version?

Thanks,
Damian