I am using the Trond Wireless Transmitter and Receiver and wireless headphones with my GPZ 7000 and am liking it. I have it plugged into my WM 12 and have had no issues. I had a friend try the set up, the only difference on the set  up was he had it direct to the headphone jack. He said there was so much EMI, couldn't use it. Does anyone else use this set up and are there any issues?