If you have a monitor that is receiving audio input from your device and it also has an AUX out port, you should be able to plug the speakers int that to get the output sound. Similarly, if your PS4 has an AUX port for headphones and or Bluetooth, you should be able to use either of those to connect to the speaker in its corresponding modes.
The speaker should turn in when you turn the volume dial and then from there you can increase the volume or power it back to the off position, let me know if that helps 😁
