wanted to find out more about the people with the Harman / Kardon Go + Play and JBL On Stage III system that this module so that is compatible and easy to use. Attention in the first version of Harman / Kardon Go + Play with a USB socket at the back you have to give either power on the USB connector, by PC, laptop, or external battery or like me through the soldering of a DC / DC converter the 13 V outputs to the USB of 5.
The music quality is finally as the iPod sound and well. With the 3.5 jack that was not so great and not so loud.
So I can only recommend.
Friendly Greeting