My daughter introduced me to the wireless BLUE TOOTH speakers from WALMART. Never turned back...
Now I can have speakers anywhere I want... Even in my shirt pocket wandering around outside around the trailer...
You use a wireless transmitter modules that gets its audio from the radio and then broadcasts it out to the wireless speakers...
I have a good 50-foot range outside my trailer to sit the wireless speakers on a table somewhere...
My speakers too are too thick for the wall and when you look in the cabinet where they are installed you can see the speaker cones and all inside the cabinet. Has to be weather proof marine type speaker cones...
Roy Ken