You sold me on the FM, Willygee. Got everything ordered. Hope I don't get kicked out of the house when I put it to use. One big advantge over the bluetooth is the unlimited number of speaker/receivers that can be used. What is the range of these transmitters?
GRJ, In your comment on the resistors, "overloading the input stage" were you referring to the input into the FM transmitter?
One thing I've noticed when I use a bluetooth transmitter with a bluetooth receiver, is that the speaker in the engine also becomes a microphone and will also transmit anything it hears.