Playing music over bluetooth wont be as good as playing thru airplay or wired. But it can be ok. What have encountered though is that the same bluetooth standard used on different BT receivers can sound better or worse. So I guess there is the difference between the DAC in the bluetooth receiver´s that makes a difference to the audio quality? I listened to a cheap 30-pin bluetooth connector, and it was awful, all the resolution in the treble disappeared. Something that does´nt happen with my JBL BT headphones. And for iPhone there is no option to get better audio quality, with for example APT-X or something like that(which iphone doesnt support), that gives you a higher bitrate? Wasnt BT 4.0 suppose to give an option to get higher bitrate streaming? Except for the very expensive dolry hifi stone, i have not found any good alternative to an ordinary bluetooth 2.1 30-pin adapter. So has anybody at least found a good BT 30-pin adapter for max of 30$?