I am trying to move my powered mixer to the back of a building. The wires have to travel 60ft to the mic's and speakers at the front of the building. When I tried this I could not get sound to come out. I have a Peavey PVi6500 400 watt system that is trying to feed 2 Peavey speakers. The model of the speakers are 112H Enclosure and the serial number is 5E-02121672. It also has 85A on it. I assume this is 85amps. These speakers are not powered. My guess is not enough power to travel that distance. Is this correct? Any ideas on how to fix this cheap?