With all amps not powered on and a PS2a in the attenuator loop and a preamp or modeler plugged into the PS2A”Iine in”, would ZMACS cab selector function still operate ? I assume I would need to move the guitar input cable into the front of the power station and unplug the “amp in” from the PS2a for this to work? I know it sounds convoluted but it would be cool if I was able to mix up the cabs with my modeler as I have ohm mismatches between my four cabs.