Let the hive mind of Engadget get that for you.
"I am looking for a device that will stream sound from one source to several recipients. For example, I want to stream sound from my TV or stereo to my phone or MP3 player that has radio and Bluetooth capabilities. I have looked into radio transmitters and they seem like a decent choice, but I can't find one that uses external power (USB or from the plug) and I would want one with a transmit range of around 50 meters. Thanks!"
The movies they are showing are B films and some seem up converted and not in true HD. The audio is rarely in 5.1. Plus there is this annoying old dude who ruins the films at the beginning with his smug commentary and complete synopsis of the film. Ditch the old dude and commentary and get on with the film!
I'd pay about 3.95 for all 4 channels not worth much more than that.