Hi Marshall,
I am havin issues connecting my CODE 50 with my iPhone via Marshall Gatway app. Bluetooth connection is working and is connected with iPhone, but when I open app, app finds the CODE 50 amp and then it says "Connecting..." and nothing is going on. If I tap on my amp under Amps Detected, gives me this message:
"Connection Rejected - You may only control amps you are already connected to for audio output". Please help.