So about 2 months ago i purchased the gorgeous B&O Form 2 headphones from Greece. The sound was WOW. The Best! Bass and everything worked great. From my iPhone, iPod and Mac! Yesterday i was listening to music from my Mac for about an hour and then i decided to leave my desk and listen to music from my iPhone. 🙁 The sound was still great but when there was bass i heard a continuous zzzzz from the left side. Put them on my Mac. SAME. iPod. Same. WHY?????