Everest Audio - HIFIMAN HE400i Planar Magnetic Headphones - Product Details


Planar Magnetic Headphones


The HIFIMAN HE400i is an open-backed headphone with specially designed planar magnetic drivers. Connection is made via the supplied cable with connectors using separate ground leads for each channel to minimize crosstalk between the channels.
Using single-ended drivers, HE400i delivers a lifelike soundstage and spatial imaging. Its increased efficiency of 93dB allows it to be driven with a modest size amplifier or even be used with a portable audio player or smart phone.

HE400i is 30% lighter than comparable planar magnetic headphones allowing the listeners to comfortably enjoy music for hours on end. In addition, a newly-designed headband and beveled hybrid earpads provide added comfort as well as improved sound quality.

The Look

  • ABS polymer ear cups in a gloss charcoal finish give the HE400i a striking contemporary look.
  • Improved pressure pattern is designed to provide best-in-class comfort.
  • Specially designed beveled ear pads are made of pleather and velour, which provide both increased comfort and improved sound quality.

The Sound

  • Delivering better quality sound than other headphone types
  • Massive diaphragm allows high signal input and flexible bass and treble
  • Very fast response time due to the lightweight diaphragm design
  • Evenly distributed magnetic force for low distortion and reproduction of live sound

Planar vs. Electrostatic

  • Compared to the electrostatic driver, the planar magnetic technology uses a more massive diaphragm that is able to move very quickly in a coherent and uniform way. The planar magnetic headphone gives excellent transient response and a sound quality almost equal to that of an electrostatic product.

Note:HE400i packaging update. We have recently updated the packaging for the HE400i to make it more environmentally sensitive. If you get a box that doesn’t look the same as you see in pictures there is no need to worry.  All that it means is you have gotten one of the new look, more environment conscious, packaging boxes. Thank you.


Frequency response:20Hz-35KHz
Impedance:35 Ohms
Cable Length:1.5m


"There may be no better deal in an audiophile headphone than the HE-400i. Although not a low-priced alternative to an audiophile headphone, the HiFiMan HE-400i is a real audiophile headphone through and through."


"The sound is significantly more transparent and vivid than Bowers & Wilkins' flagship P7 headphones. But the HE-400i's clarity shouldn't be confused with mere brightness or hyped treble -- the headphone just lets you hear more deeply into your music. It's akin to looking through a cleaner window."

Sound and Vision

"The non-fatiguing sound of the HiFiMan HE-400i will have you falling in love with your music all over again."

For years, there were a couple of headphones that ruled this price range. Many feel now the torch has been passed to the HIFIMAN HE400i. HIFIMAN brought previously very expensive planar magnetic headphone technology to a new price point along with the ability to be much more easily driven. The incredible musical experience these headphones provide is now available to all at a price well below its rivals.