the BT connection to the Nexus 4 was done quickly.
Unfortunately occurs during playback on a high-frequency, well audible whistling. Especially with silent song passages a very annoying side effect.
This is an absolute knock-out criterion for me.
Will the item is sold must return.
Greeting
Addendum 15.02.2013:
Have received a replacement unit. This works fine, without excessive noise. Thank Divoom!