There really doesn't seem to be much involved, but that's what has me thinking...what am I missing?
The way I see it is...5.1, 7.1, etc is not necessary...as it is only FM Stereo from the transmitter...so all I would need is an inexpensive 2 channel receiver. The source (DVD, BD, HDDVD, PC, etc.) I guess I could plug the source directly into the FM Transmitter, but I would rather run it through the Receiver. So source to receiver, receiver to FM Transmitter, and Transmitter out to the radio's (Boom Boxes) that guests can bring and set on their blankets and such. Heck...it's pretty much what they do at the Drive-Ins....should work. Not sure what the FCC rules are on the whole thing...but I know the transmitters are out there. Here is a link to a site I found
Oooops...can't post urls yet, so - Go to the hobbytron site
Just not sure what would really work. I do like this one though. It has a Mic input...I remember so many times at the Drive-Ins...someone getting on the Mic and making announcements...could be a great way to welcome guests.
Again...can't post urls...so same site - Pro FM Stereo Radio Station FM100B