Alright guys, I have a question. For days on the sand bar we want to be able to link our boats audio wirelessly, but maintain excellent quality. Apple makes a bluetooth device that allows you to link 2 receivers. I have searched and I can't find a bluetooth device that links more than 2 receivers. I have also been looking at FM transmitters. An FM transmitter would definitely be the best setup, but I have never heard a great quality FM transmitter.
I am sure somebody on this forum can lead me in the right direction.