Originally Posted by Brian B-P
For those wanting hard-wired, cables could exit through the floor and lead to jacks in a protected location (such as above the bumper or tongue). This is still a shell penetration, but it's not going to let water in... provided that you don't go fording rivers.
In my 19 I had Escape run wires from the built-in stereo to the access hatch on the passenger side to play outside. I never did get around to wiring something in, as playing a stereo inside while we were outside just didn't seem the best to do.
What I have been using for some years now, is an older but decent construction radio with a bluetooth receiver connected to the input, and just used my phone which has about 8,000 songs on it.
While bluetooth works decent, you must stay within range with the transmitter and receiver, or the music cuts in and out. Either that or you leave your phone behind. I know some people just use an old smart phone as a dedicated music player.
What I have been using at home lately is Sonos components, which work via WiFi over my home network. They offer really good sound quality, and the range is only limited to that of the network for control. As well, you can access music from any device on the network. Radio streamed at home via our IP is WAY clearer than that received over the air too. The Sonos system can be operated from any device on the network too, from phone, to tablet, to PC. You can listen to different music on ever speaker too.
I have considered bringing a small Sonos speaker (or two) along in the trailer. Though to use, one does need a router to set up a network, but I have full intentions of adding a WiFi repeater and can use the router from that setup. The main drawback for me with this system is that it requires 120V to operate, so if camped off the grid with music playing a fair bit, it would tax your battery capacity a fair bit. I plan to try it out though, and just monitor the batteries to see how it fairs, probably using their smallest speaker.
Sonos | HiFi Wireless Speakers & Home Audio Systems