HiFiMAN HE-400i User manual

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Owner’s Guide
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HIFIMAN HE400i

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www.hifiman.cn
Customer Service Tel: [phone]
E-mail: [e-mail]
Website: www.HIFIMAN.com

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www.hifiman.com
Thank you for purchasing the HIFIMAN HE400i, a high quality,
full-size planar magnetic headphone designed for critical listening
in the home or studio. HIFIMAN is a leading designer and manufac-
turer of high performance headphones, headphone amplifiers and
portable players.
This Owner’ Guide is intended to provide a useful overview of your
new HE400i and how to best operate it for many years of enjoyment,
safety and reliability. Please take the time to familiarize yourself
with its many features. If you have any questions or need additional
information, please contact your authorized HIFIMAN dealer or us
directly.

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Product Overview
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The HIFIMAN HE400i is an open-backed headphone with specially
designed planar magnetic drivers. Connection is made via the supplied
cable with screw-on 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.

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• Frequency Response: 20Hz - 35kHz
• Impedance: 35 Ω
• Efficiency: 93dB
• Weight : 370g (13.05oz)
• Headphone Cable (1.5 meter or 4.9 Feet; 3.5mm plug)
• Earpads：1 pair (on the headphone)
• ¼”(6.35mm) headphone adapter
Note: The HE400i is designed to be used with its earpads on at all
times. If for some reason, you need to remove the earpads, please
replace them as soon as possible.
Specifications
Accessories
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If the top of the headband does not touch your head, move the sliding black block
on each side of the headband so that the headband rests on top of your head.
Headband Adjustment
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Earpad Design and Replacement
The HE400i earpad is a beveled design with varying thicknesses to
conform to the human head. Should you need to remove and reinstall the
earpad (i.e. for replacement) keep the thinner part on the front side of the
ear cup and thicker part on the back. Fit the mounting flange onto the rim
of the ear cup. Then press around the mounting flange to make sure the
earpad snaps into place.
HE400i
Thick Thin
①
②
③

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Set-up and Operation
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1. To obtain optimum performance, please allow at least 150 hours of
constant use for break-in of your new headphone. This break-in period
does not have to be at high volume.
2. The connectors utilize 2.5mm mini plugs on the headphone side.
Push the connector straight onto the socket. Repeat the process with
the other mini plug connector.
3. The supplied cable adapter with the large ¼”(6.35mm) jack is
connected with the typical headphone output of an amplifier or even
better with a headphone amplifier. Please be aware that many home
amplifiers will switch off the loudspeaker output when a headphone is
connected.
4. To clean your headphone, please use a soft, slightly damp cloth only.
Do not use any detergents and make sure not to let any fluid enter the
open sides of the headphone. The leather headband can be maintained
using standard leather care products. When your earpads become worn
and no longer offer a good connection to your head, you should
replace them with new ones which can be supplied from your dealer, or
head-direct.com. Note: The internal drivers do not require maintenance.
Any attempt to remove or modify them will void your warranty.

• One-year free repair or replacement when used according to our
recommended instructions. Contact us first to troubleshoot before
returning and then if needed, an RA will be issued. Return shipping to
HIFIMAN or authorized service facility is the owner’s responsibility.
• Product is intended for residential use only.
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Warranty
For any further information or questions, please contact your authorized
HIFIMAN dealer. Or email us directly at customerser[email protected].
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