Same on our Open Road, they're only connected to the Radio. You use the 'fader' control, just like in your car, to balance between the front and rear speakers, or send everything to one set. It'd be nice if there was a 'remote' control in the bedroom area to change volume and stations, just like our boat. The radio can be controlled from a small remote panel on the swim platform.
Jay & Peggy Monroe with Dolly
Can't take it with you - don't plan on leaving any behind
2016 Newmar London Aire 4553, Spartan chassis
2020 Jeep Wrangler toad