[MerlinB]

I have the same system and had the same problem. Initially my outside speakers worked then they quit. I pulled the control head out and found my inside speakers are connected to the Speaker A output and the outside speakers were connected to the Speaker C output. With a little troubleshooting I determined there was no signal coming out of the Speaker C connection but there was signal available from the Speaker B output which wasn't connected to anything. So I connected my outside speakers to the Speaker B output and now they work fine.