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HiFiMAN HE-400i Open Back Headphones with Replaceable Cable

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  • Enhanced sound quality, lighter weight and improved comfort

  • Special magnet structure delivers superior audio reproduction

  • Easily driven with standard output devices without amplification

  • Open backed circumaural earcups deliver open soundstage

  • Detachable cables for ease of upgrade or replacement

HiFiMAN HE-400i Open Back Headphones with Replaceable Cable

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HiFiMAN HE-400i

Rightfully a true master in the high-end headphone world, HiFiMAN is proud to present the newest member of their acclimated planar magnetic headphone range, HE-400i. HiFiMAN has taken all the essential features of the hailed HE-400 and improved upon them. With enhanced planar magnetic driver design the HE-400i offer a more transparent and spacious presentation. The lighter weight and re-designed comfortable earpads and headband add to the absolute audiophile listening experience.

The HIFIMAN HE-400i are high quality, full size planar magnetic headphones designed for critical listening in the home or studio. Unlike dynamic drivers used in most headphones and speakers, planar drivers use thin flexible diaphragms with voice coils etched onto their surface rather than a voice coil attached to a cone.

HiFiMAN HE-400i are lighter than the strapping HE-400 design and features a suspended headband connected on two sides by the band structure. This, along with its driver housing design makes the headphone much lighter and airy than the previous generation.

Taking audio technologies to the next level - HE-400i.


HiFiMAN HE-400i


High Performance
HIFIMAN HE-400i is a full-size planar magnetic headphone intended for high performance listening in the home or studio. With a high sensitivity level, remarkable for planar magnetic headphones, the HE-400i requires less power and can easily be driven with most low powered devices.

Superior Cable
With premium cable comprising of a Crystalline metal with oxygen free copper and silver, as with all HiFiMAN headphones ,the HE-400i features symmetrical wiring, where in each driver has it’s own separate audio cable resulting in lower crosstalk between each channel.

Improved Comfort Levels
The HE-400i is 30% lighter than the predecessor allowing the listener to comfortably enjoy music for hours on end with minimal listener fatigue. With newly-designed headband and edged hybrid FocusPad earpads, the HE-400i provides both increased comfort and improved sound quality.

Sharp Design
The gloss ear cups are finished in a smoky grey, Mylar finish gives the HE-400i a striking contemporary look.


 HiFiMAN HE-400i



  • Headphone type: Circumaural (around the ear)
  • Driver type: Planar-magnetic
  • Sensitivity: 94dB
  • Impedance: 35Ω
  • Weight: 360g
  • Frequency response: 20Hz -35kHz
  • Cable Length: 2m


HiFiMAN HE-400i



  • Lighter weight, enhanced sound quality and improved comfort over HE-400
  • Special magnet structure delivers superior audio reproduction
  • Easily driven with standard portable audio players
  • Open backed circumaural earcups deliver a wide and open soundstage
  • Comfortable lightweight design with special earpads and headband
  • Detachable cords for ease of cable upgrade and replacement



  • HiFiMAN HE-400i
  • OFC copper cable (2m) with 6.35mm jack plug
  • 2 cable connectors
  • Leather storage box
Product TypeHeadphones
Feature KeywordComfortable, Hi-Fi, Lightweight, Noise Isolation, Open, Over Ear, Over Head, Portable
Recommended UseDigital audio player, Hi-Fi, Portable audio system
Manufacturer Warranty2 Years
Included AccessoriesOFC copper cable (2m) with 6.35mm jack plug, 2 cable connectors, Leather storage box
Part NumberHE400I
Headphone Fit TypeOver Ear
Headphones TypeHeadphones - binaural
Cable EntryDual Sided
Cable Length2m
Connector AngleStraight
Connector TypeHeadphones (6.35 mm stereo jack)
Detachable CableYes
Driver SizeNo
Driver TypePlanar Magnetic
Connectivity TechnologyWired
Earcup DesignOpen Back
Frequency Response20Hz -35kHz
Headphones Form FactorOver Ear
Headphones TechnologyPlanar Magnetic
Number of DriversN/A
Sound Isolation (dB)No
Sound Output ModeStereo
Smartphone CompatibilityN/A
Smartphone ControlsNo
Total Harmonic Distortion (THD)No
Wireless TechnologyN/A

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