Hifiman HE 400i (ex-demo)

Created by the innovator of the
planar magnetic technology, the
HIFIMAN HE400i is a high quality,
full-size planar magnetic head-
phone created for critical listening
at home or in studio. The new gen-
eration headphone becomes more
lightweight with largely improved
sensitivity

Planar vs. Electrostatic

Planar magnetic and electrostatic
drivers are similar in regards to low
distortion and high signal input.
Compared to the electrostatic
driver, the planar magnetic technol-
ogy uses a more massive dia-
phragm that is able to move very
quickly in a coherent and uniform
way. The planar magnetic head-
phone gives excellent transient re-
sponse and a sound quality almost
equal to that of an electrostatic
product
Breakthrough Innovation
Single-ended planar magnetic driver provides
superior soundstage and spatial imaging.

Comfortable

The HE400i is 30% lighter than other full-size
planar magnetic designs for increased comfort.
Lively – Agile
Using single-ended drivers, HE400i delivers a Lively
soundstage and spatial imaging.

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.
The Look
• ABS polymer ear cups in a
gloss charcoal finish give the
HE400i a striking contempo-
rary 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.
High Quality 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 light-
weight diaphragm design
Evenly distributed magnetic force for low
distortion and reproduction of live sound