Texas RV-er - Not to sound like a sales guy, but the thought behind having 2 stereos is to provide independent listening options upstairs and downstairs. We wired the upstairs to the outside thinking maybe you would be inclined to have a desire for independent listening outside and in the living room, too.
I always thought it was inconvenient to force the same listening on the outside and in the living room. My wife doesn't like listening to the ball games on the weekends!
Feedback from customers on our decisions will always be considered.