Manufacture Discription: One of the highest efficiency planar phones in the world! HIFIMAN’s newest HE400S sounds terrific on your smartphone or most any portable audio device. HE400S delivers all the lifelike clarity, detail, extended bass and wide sound stage that audiophiles have come to expect from HIFIMAN. Innovative headband and specially designed ear pads for … Continue reading HIFIMAN HE-400S Planar Magnetic Headphones Review