Whenever I watch tv and movies, it seems that I can hear a high pitch sound coming from the speakers. What is this? The receiver is a NAD Receiver T760, the amp is a Kenwood M2 Basic. Is there a high pitched filter I can put on the line. I hear the sound when watching movies on DVD player and TV signal.
Any ideas?? Thank you.
P.S. When I turn the amp up it gets louder. Almost like a headache.