I have the same, i’m using Blue tooth headphone now. Tried all diferent types (jack) headphone’s cheap. expensive. All (jack) headphones had the same buzz noise, sometimes after a while the buzz will drop to almost zero, but will return after a while.
Hi there! This might be the jack problem, you may consult technical support team for the solution. My friend was having the same issue, but after replacing the headphone with the new one such as http://www.soundmagic.us/index.php/product-category/headphones/ and his problem got resolved. Also, you can find out more info by consulting an expert.