A:AnswerI believe you will need a Bluetooth transmitter, unless your AVR has Bluetooth. My Soundtouch 10 is in a separate part of the house; I there's a millisecond delay which is barely noticeable, unless you're really paying attention to it. I believe the delay depends on the Bluetooth transmitter/link you have. I don't have the Bose Link; I wish I did and I think my set-up would work even better with it, but it is more expensive than many others.
A:AnswerThat's why I like it better than Sonos -- the Bose software includes most streaming services (although you have to control them through the Bose Soundtouch app on your smartphone). Or you can stream through your phone and connect to the speaker via bluetooth or with a cable.