tnx for your explanation Daniel, but I already know that.
What I said concerning the amp remote wire (connected to the ign sw.) was for the real amp wire, not the empeg blue wire. In this case it was working. But now all my wires are correct. It was due to the VW ISO power connector scheme: the 2 blue wires from empeg ISO were corresponding to a permanent 12v red wire for VW ISO, and that was the big problem. now I isolated this connection and everything works fine. The only thing I want to know is: why the empeg's power antenna & amp remote wires (ouput line) go back to the ISO power connector, which normaly receive power from the car, and not from the empeg??? In which goal is it for?