First off, thanks for asking the question. This topic has been a springboard for me to investigate upgrading my camper audio system. We have TV & DVD player that routes through the crappy camper stereo system.
I was thinking of adding a wired and very heavy (weight) subwoofer.
But I've also experienced the newer Bluetooth speakers (both Big Jambox and Bose) and have begun researching how to upgrade the camper stereo system.
It looks easy (famous last words).
There's this gadget:
https://www.amazon.com/Avantree-Audikast-Latency-Bluetooth-Transmitter/dp/B077MXFJGQ/ref=dp_ob_title_ceAnd I already have one very nice miniature Bose speaker to start with. This could turn out pretty good.
Thanks again!
