Late model FBs have a factory radio problem!
These are the newer units with the microphone above the dinette at the rear.
Airstream hooked up the radios as you would think front speakers in the front of the trailer and rear in the back.
Anyway, If you sink your phone to the radio then try to have a conversation via the microphone, you will discover that the audio conversation only comes out the front speakers (the bedroom) and the mic is at the rear end of the trailer above your dinette and it is impossible to use this way. The speakers have to be wire backward for it to function as intended. Front to the rear and vice versa.
I call Airstream twice and they did not want to her about it and would not even return my calls.
Anyway I think anyone with these units should return to your dealer and have it fixed at Airstreams expense.
If you could have a superpower, what would it be?
I chose America