Hi All. When I camp, I take an XM sat radio boombox with me. I'm thinking of adding some exterior speakers to my popup.. Ideally something on the roof, door-side, that I could possibly cable the headphone jack to. Does anyone have any experience with a speaker system that is installed on the top as a receptacle with plug in mini speakers that you add during set-up?---- Or something that could work for this kind of thing? Thanks for any ideas!