I cannot get any sound out of my unit. It has been stored for 1 year in a closet and now I do not have any control of the volume. I am using a Yamaha receiver with a subwoofer output. Single cable to the F/X; no sound. Single cable to either the left or right subwoofer inputs of the Mirage; no sound. Single cable from Yamaha receiver to spliter on the left and right inputs of the Mirage unit. Suggestions?