Hi everyone: I really need some help. I am running a onkyo Sr-606 tuner. I have 5 speakers rung fine on zone 1, and I recently added two speaker to Zone 2. Quite often, Zone two is shutting down no matter what source I use. FM, Denon Dock, etc. It turns the receiver off and goes into some sort of protection mode. Zone 1 solo is fine. I am running the speaker wire into a volume control knob. Its a rocket fish unit. It stopped doing it for some time, but then stared back up again. Do the levels on each zone need to be set a certain way? I called Rocketfish, and they said the model I have is not impedance matching. Could this be it as well? Thank you! Rob