Cheers mate, I have BT built in but the iPod dock is no use to me as I want to stream from Google play and Amazon music. My Concert 2 doesn't do audio over BT as you probably know already. I found out today that the 6cd is not built in, so must be the changer model hence I've ordered the Ami usb interface to replace the iPod dock in the hope that will work and the existing Bose / Concert will be perfect for me