Ok first off Iââ‚ ¬ÃƒÂ¢Ã¢â‚¬Å¾Ã‚¢m no engineer, but youââ‚Âà ‚¬ÃƒÂ¢Ã¢â‚¬Å¾Ã‚¢re radio1 RF is kind of a totally different matter altogether.
Broadcast RF is nothing like RF through a cable. It's broadcast through the air.
Ok letââ‚Âà ‚¬ÃƒÂ¢Ã¢â‚¬Å¾Ã‚¢s take that a step further, once the FM RF signal is is received by an aerial it is sent to a stereo. Fine but what happens if you add another, and another to the same aerial. The signal gets weaker, and youââ‚Âà ‚¬ÃƒÂ¢Ã¢â‚¬Å¾Ã‚¢re sound quality ends up crap.
Just my 2 cents