... I noticed noise on my empeg. They transmit the movie sound through a radio broadcast. I received it through PCATS' radio module and heard some background noise that sounded like static. I paid special attention to ground-loops and such when I installed the empeg, but I only tested with the engne running. Now, in the movie theater, I noticed noise with the engine off. There is no noise with the engine on. Before I get my multimeter out to trace the noise, do you have any idea where I should start looking when I have noise with engine off and no noise with the engine on? Thanks for any hints!