I realize this is not your planned installation but wanted to pass along a couple of points I had with my 14RT OFF-ROAD POPUP AM/FM Radio install. My original JENSEN AM/FM went bad on me and kept blowing its fuse so I replaced it with newer version JENSEN AM/FM Car Radio that had a DVD player in it..
You will also need to install a second 12VDC switch to simulate the auto ignition key operation if you want to your radio to keep all of its settings. Otherwise everytime you turn it on you will have to start pushing buttons...
I usually leave the main radio ON-OFF in the ON position when I head out on the trip and then just use my igition key ON-OFF switch to use the radio. Then I when I get back to the barn I will go ahead and turn off the main radio switch. Of course this will give you yet another small drain on the battery that is always present which is a small drain but with all the other keep alive 12VDC things they all seem to add up I guess...
This is a shot of my RADIO install position and I mounted this 12VDC 5AMP switch (Radio Shack) next to the radio on the right side.

My AM/FM car radio is great for my use. I like the front-rear stereo speaker fadder function with the front position being the two inside stereo speakers in the bottom of my wrap around seating and the rear position being the outside stereo speakers under our awning sitting area.

My car radio antenna looks something like this and is mounted to the side of my off-road POPUP main body. This is marine am/fm radio antenna made of flexible rubber

You can just see it mounted in this photo of a RT14 off-road POPUP on the left side of the POPUP main body. The antenna is rotated down for travel mode.
Sounds great in my OFF-ROAD POPUP.
Roy Ken