This was my second purchase of the same item. The first set I would give 5 stars, but this second set sits unused in my office at the moment. It unfortunately picks up audio interference once it's turned on; there's constant static and it occasionally picks up a radio station I can't identify. I'm not sure what is the difference between the two sets, which is unfortunate as I was impressed by the quality of the first.
xylianMight it be your monitor? I've noticed if I plug it directly into some monitors it makes weird sounds depending on the brightness of the screen, I just need to plug it into the PC instead.