I bought this as recommended by Ruark Audio to connect my older R4 music system which did not have Bluetooth.
The QED worked great right out of the box simply connecting into the phono sockets at the back of the unit.
The only reason it doesn't get 5 stars is because every time I use the unit I have to manually select the QED via my iPhone's bluetooth menu - unlike when using my apple ear pods or driving my car for example.