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!"
Hmmm, all the "If your TV is X inches, you should sit Y inches away" charts only goes up to 65". How far away should I sit for a 2106 inch TV?
I think the 50 yard line would suffice.
Whatever the distance is...that wasn't even close to far enough.
"Half the Distance to the Goal" Repeat 2nd down.