HIFIMAN is a personal audio company founded by Dr. Fang Bian, a materials scientist who started the business as Head-Direct in New York in 2005 and launched the HIFIMAN brand in 2007. The company is headquartered in Tianjin, China, with a U.S. office in Bellmore, New York, and is best known for its planar magnetic headphones and high-resolution portable audio players.

The company helped popularize the modern high-end portable player category with the HM-801 in 2009, and has since built a broad headphone lineup centered on planar magnetic drivers. Core models include the entry-level Sundara, the mid-tier Ananda, the Arya, and the flagship HE1000 and Susvara, alongside in-ear monitors, desktop amplifiers, and Bluetooth-equipped variants. HIFIMAN has developed several proprietary technologies for these drivers, including its NEO Supernano Diaphragm and Stealth Magnet structure.

HIFIMAN occupies a prominent place in the audiophile and head-fi community, with its products frequently reviewed on sites such as Head-Fi, Hi-Fi+, and Audio-Head. The brand's identity is closely tied to its pursuit of thinner diaphragms and open-back designs aimed at reference-style listening rather than studio or stage use.

HIFIMAN has 15 products cataloged on Equipboard, including Headphones & In-Ear Monitors and Headphone Guitar Amplifiers. Their gear is featured by 4 artists, with the strongest followings in Electronic and Rock. Notable users include Lenno, DROELOE, and Matt Galligan.