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!"
We tried every fancy and expensive in and out of house antenna (all the hi-end Terk stuff, for example) and they didn't work well.
Tried an old school aluminum one (aka - the 1970's one) and it was wonderful.