The Nordost Blue Heaven has almost no shielding which makes it very sensitive to any interference. I use the the Blue Heaven and Red Dawn in my audio system, but found that the system had to be well away from any tv, antenna wire, etc. I called Nordost at the time and they said to keep the cables away from such sources of interference and also listed external speaker crossovers as an interference source. A local Vandersteen and Nordost dealer has told me the same thing. When I moved the interfence sources away from the audio gear, the problem went away. I also once tried using Red Dawns for interconnects between a turntable and phono stage. That didn't work either and resulted in the same type of hum.