Is it possible to power wireless speakers thru the in-dash radio (Magnadyne M4)? Our MH has an outside TV and radio, but I'd like to listen to radio outside the coach without opening the entertainment center (to minimize dirt, damage potential). Has anyone tried to do this? I'm not sure if the radio has the capability of sending a usable signal to bluetooth enabled speakers. Most of these systems seem to be setup to receive pre-recorded music from smart phone, ipod, etc.