Home Slickdeals Massdrop x HIFIMAN HE4XX Planar Magnetic Headphones $170 + Free Shipping Slickdeals Massdrop x HIFIMAN HE4XX Planar Magnetic Headphones $170 + Free Shipping By ARCOM - 2 March 2018 209 0 SHARE Facebook Twitter Go to the deal page: Massdrop x HIFIMAN HE4XX Planar Magnetic Headphones $170 + Free Shipping