I have the blue channel working by using the + and - of the Jack plug. Didn't used the ground. Can't get that other channel working?
Picture of the evg.
http://img.tapatalk.com/d/13/12/08/yqa3asym.jpg
http://img.tapatalk.com/d/13/12/08/anegunen.jpg
Do I need to use the ground of the jack cable to get this thing going?