C CRANE sells on of these wireless transmitter where you can plug it into any speaker jack of any radio and then pick it up with outside with any portable stereo FM portable radio. Im sure WALMART and others have something similar
If it were me I would get one of these F-type dual TV weather proof flip lid boxes like someone here suggested already. You need one smal hole going into the trailer. You could either adapt the plate for RCA jacks or find a F-Connector to RCA Jack adapter from Radio Shack.
I use these type flip lid connector plates for alot of my outside Ham radio connections...
You can remove the F-connector and adapter to almost any type connector from Radio Shack.
My OFF-ROAD POPUP solves this with two mounted weather proof speakers in a larger hole in the side of the trailer on the awning side.
My JENSEN fader slide switch selects two stereo speakers inside the trailer and then fades to the outside speakers or runs both sets of stereo speakers in the middle.
Just my thoughts
Roy Ken
