HE 400 I2 HE 400I


The HIFIMAN HE-400i is a high quality, full-size planar magnetic headphone designed for critical listening in the home or studio. At little more than twelve ounces, HE-400i is 30% lighter than comparable planar magnetic headphones allowing the listener to comfortably enjoy music for hours on end. In addition, a newly-designed headband and beveled hybrid ear pads provide added comfort as well as improved sound quality. Using single-ended drivers, HE-400i delivers a lifelike soundstage and spatial imaging. Its increased efficiency of 93dB allows it to be driven with a modest size amplifier or can even be used with a portable audio player or smartphone. A premium cable is included comprised of Crystalline metal with Oxygen-free copper and silver. HE-400i features ABS polymer ear cups in a gloss charcoal finish.


Frequency Response: : 20Hz-35KHz
Sensitivity : 93dB
Impedance : 35 Ohms
Weight : 370g
Cable Length : 1.5m
Plug : 3.5mm/6.35mm


Being familiar with planars from Audeze, Fostex, and MrSpeakers I want to report how the HE-400i from HiFiMAN stacks up. HiFiMAN aims at delivering a comfortable headphone with tight bass while still keeping the planar sound signature. They also strive for the HE-400i to be easily driven by portables and we will investigate the efficiency along with the acoustics.

The initial impression is that the packaging, headphone, and cable all make one cohesive bundle with the exception of the right-angled jack plug on the end of the cable. I see no reason for a right-angled jack plug. This and all of my other headphones all have a straight jack plug. It appears to be an attempt to make it more portable, but the headphones themselves are so large it is unlikely that anyone is going to wear these away from their home rig. HiFiMAN did replace the screw in connectors that attach the cable to the headphone with 2.5mm stereo jacks making connecting the cable a cinch. Yay! READ MORE: