I originally had an IE8 that was replaced under warranty with an IE80 from Sennheiser. I never quite liked it as much with the harder wire and somewhat bassist response, and eventually noticed that they would cause static if the headphone jack was turned. For some reason they seem to require a specific positioning or else there is static. This is the case from any source (my iPhone, laptop, etc.). I thought I got a defect so I got them replaced again and same thing! What is going on? This never happened with my IE8s
I have had two pair of these, the headphone cord/plug static is temporary. It stopped after about a week with both sets. Hope that helps.