Polk Magnifi Max SR network

Just recently picked up a Polk Magnifi Max SR.

Set it all up and had to use the Google Home app to update the firmware after it wouldn't do it via the network cable.

Now I have an open wireless network being broadcast from the sound bar. "Living Room Speaker.003". So, if I take another wifi capable device, I can connect to it and use the google home app and re-setup the device and then broadcast to it.

Do I have the ability to password protect this wireless device? This seems like a pretty big oversight that I am not able to limit who can connect to it.