If you only know that HIFIMAN's player is very famous, then it is unfair to HIFIMAN, a domestic brand. Because in addition to the player, its headphones have also been reported by Western mainstream media, such as Time Magazine, Forbes Magazine, The Independent, CNET website and so on. In the U.S. Consumer Reports, HIFIMAN headphones were also highly recognized, with their models HE-400i and HE-400S both scoring 88 points, tied for second place. In terms of hearing, the overall sound quality of HE-400i is excellent, and it belongs to the warm style. The bass is full, and the dive is deep. The midrange is well-balanced and detailed, but attenuation is noticeable in the upper part of the midrange. The treble is extended enough, but there is a slight dimpling. At the same time, it has excellent design and good comfort. In terms of price, the HE-400i is 2499 yuan, and the HE-400S is 1799 yuan. One thing to note is that Consumer Reports points out that the HE-400i and HE-400S have low sensitivity, and if you have a low-thrust device like a mobile phone on the front end, the sound quality will not be well presented, and they are more suitable for audiophiles who have an audio system.