I have a Denon x4000 which has two trigger outs. I used one for my EP500. I find that it doesn't reliably turn on the sub. Sometimes I have to unplug the sub for 10-15 minutes and then reconnect the trigger cable and turn everything back on to get it to response correctly to the signal from the Denon. I've tried with both trigger out ports and end up with the same sporadic problems. I've also noticed that when it doesn't trigger the sub on, and the sub LED is red, if I wiggle 3.5mm cable in the sub port sometimes I see if flicker from red to green for an instant.

I'm concerned I may have some defective electronics. Has anyone else noticed this type of behavior with the EP500 trigger?