To turn off the bedroom speakers use the Home button on the receiver remote to go to Settings/Speaker Settings. Change the Speaker Pattern to 3/2.1 (you will still get surround when the show supports it) and then you will be able to assign the bedroom speakers (SB Assign) to B. Then the bedroom speakers will be Speaker B and will only be on when you select Speaker B on the receiver.
Steve and Diane
2016 38 RSB3
2014 F-350 Lariat Diesel Dually