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HIFIMAN HE-400i + EF-2A Amplifier

Wired Over-Ear Planar Magnetic Headphones + Vacuum Tube Driven Headphone Amplifier/USB DAC

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• HiFiMAN HE-400i Wired Over-Ear Headphones
• High Fidelity Planar Magnetic Drivers
• Sensitivity: 93dB
• HIFIMAN EF-2A Vacuum Tube Headphone Amp/DAC
• Uses 2 6J1 Vacuum Tubes
• Burr Brown PCM2702 DAC
• 2 Rear Inputs & Front 1/4" Headphone Jack

Learn more about the he400i_ef2a

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Product Highlights


• HiFiMAN HE-400i Wired Over-Ear Headphones
• High Fidelity Planar Magnetic Drivers
• Sensitivity: 93dB
• HIFIMAN EF-2A Vacuum Tube Headphone Amp/DAC
• Uses 2 6J1 Vacuum Tubes
• Burr Brown PCM2702 DAC
• 2 Rear Inputs & Front 1/4" Headphone Jack

Description


HIFIMAN brand icon

Authorized dealer

HiFiMAN Truly Delivers

HiFiMAN doesn't build your average pair of headphones; they build works of art to truly introduce you to your music. The HiFiMan HE-400i planar magnetic headphones let you hear every minute detail in your music like you've never heard before. The HE-400i feature some of the finest headphone engineering and craftsmanship available today to bring you a pair of headphones that, once you put them on, you won't want to take off. An added benefit of the HE-400i headphones is that, due to their highly efficient operation they can be plugged directly into your smartphone, tablet or any other output device; it is important to note that to take full advantage of the HiFiMAN HE-401i a headphone amplifier is highly recommended. Don't let your ears toil away with a mediocre pair of headphones when you could be basking in the glow of the HE-400i headphones from HiFiMAN!

Lose Yourself in Your Music

HiFiMAN engineered the HE-400i headphones with full size planar magnetic drivers which produce warm, balanced sound. The advantage planar magnetic drivers offer over your average headphone drivers is that they cover a larger surface area to deliver outstanding sound detail and spaciousness. Their incredibly natural timbre combined with the open back design make these headphones sound like you're sitting in the crowd at a show.

Listen in Luxury

With the HE-400i headphones, listener fatigue won't be a problem. These sleek over-ear headphones offer FocusPad ear pads, beveled ear pads made from a mix of pleather and velour to improve both comfort and durabililty. The newly designed headband provides a greatly improved pressure pattern. They are also 30% lighter than comparable headphones. The HE400i headphones offer you best-in-class comfort.

Quality Connection

The quality of your headphones doesn't matter if you don't have a connection to match. HiFiMAN designed screw terminal inputs into each ear cup for a secure connection. Each connection uses a separate ground lead for each channel to significantly reduce unwanted crosstalk between channels, improving your overall sound quality to optimize your listening experience.




HIFIMAN HE-400i

Wired Over-Ear Planar Magnetic Headphones
Quantity: 1

General Features:

  • Orders limited to one unit per customer through 1/3/2016
  • Wired Planar Magnetic Over-Ear Headphones
  • Planar magnetic drivers offer a detailed, warm listening experience with minimal distortion
    • Not sure what Planar Magnetic Drivers are? Click here to read our Headphone Driver Type knowledge base article
  • Open back design provides an incredibly spacious sound stage
  • FocusPad hybrid earpads
    • Beveled pleather and velour cushions for vastly improved comfort and sound quality
  • 30% lighter than comparable headphones for maximum comfort
  • Newly designed headband with an improved pressure pattern for improved comfort
  • Primary Color: Smoky Gray
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product Specifications:

  • Frequency Response: 20-35,000 Hz
  • Sensitivity: 93dB
  • Nominal Impedance: 35 Ohm
  • Cable:
    • Detachable: Yes
    • Cord Length: 5 ft. (1.5m)
  • Plug Size: 3.5mm
  • 1/4" adapter included

What's in the Box?

  • HiFiMAN HE-400i Planar Magnetic Headphones
  • 5 ft. Audio Cable w/ Screw-On Terminals
  • 3.5mm to 1/4" Adapter
  • User Guide
  • HiFiMAN Social Media Card
  • Serial Number Card

Note: HiFiMAN products can only be shipped to customers in the United States

Also found as: HE400i

HIFIMAN EF-2A

Vacuum Tube Driven Headphone Amplifier/USB DAC
Quantity: 1

General Features:

  • Compact desktop headphone amplifier/DAC
  • Provides significantly more dynamics and detail to your headphones
  • Utilizes two 6J1 vacuum tubes for the amplifier input stage
    • Injects smoothness and clarity into your music to really bring it to life
  • Burr Brown PCM2702 digital-to-analog converter provides exceptional sound quality
  • Rear USB input allows you to connect to your computer and bypass the built-in DAC and audio circuitry
  • Rear stereo RCA audio input allows you to enjoy your music from other audio sources
  • Full size front stereo headphone output
  • Rotary volume control
  • Sleek, durable metal chassis
  • Acrylic top panel
  • External power supply included
  • Dimensions: 5-11/16"W x 4-1/4"D x 3-1/8"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Specifications:

  • Input Impedance: 47,000 ohm
  • Output Impedance: 32-300 ohm
  • Output:
    • @ 32 Ohm: 3 v, 320 mw
    • @ 150 Ohm: 6.2 v, 256
  • Frequency Response: 20-20,000 Hz
  • Signal-to-Noise Ratio: 95dB
  • Distortion: 0.2%

What's in the Box?

  • HIFIMAN EF-2A Headphone Amplifier/DAC
  • Two 6J1 Vacuum Tubes
  • AC Power Adapter
  • 5' USB Cable
  • User Guide

Note: HiFiMAN products can only be shipped to customers in the United States

Specifications & Details


Headphone Design
Headphone Type
Enclosed-Ear
Headband Type
Over the Head
Specifically For
Home/Portable
Headphone Application
Home Hi-Fi
Home/Office
Studio
Acoustic Principle
Open
General Features
Noise-Canceling
No
Built-In Microphone
No
Headphone Connection
Corded
Volume Adjustment
No
Jack Size
3.5mm
Jack Angle
Straight Jack
Included Adapters
1/4" Adapter
Detachable Cable
Yes
Color Shades
Silver/Gray
Material
Metal
Plastic
Ear Cushion/Earbud Material
Protein Leather
Velour
Water Resistant
No
Foldable
No
Audio Features
Driver Type
Planar Magnetic
Impedance
35 ohm
Sensitivity
93 dB
Frequency Response
20 - 35000 Hz
Audiophile
Yes
Built-in Amplifier
No
What is in the box?
Paperwork
User manual
Warranty/Registration card
Serial number card
Main Product
HIFIMAN HE-400i Headphones
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

HE-400i_EF-2A

Weight:

7.80lbs

Internal SKU:

he400i_ef2a

Internal Product ID:

97773

Product and How-to Videos


  • Differences Between Headphone Acoustic Principles | Open, Closed, & Semi-Open
  • Headphones Based on Musical Preference | What Type of Listener Are You?

Customer Ratings & Reviews


HIFIMAN HE-400i + EF-2A Amplifier thumbnail image

5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
5
Features
4
Design
5
Usability
5

Customer Reviews

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Great value on sale for a great headphone

The following review is for HE-400i, which is a part of the bundle you are viewing.

I would totally recommend this product for someone looking for a step up in their headphone setup (coming from an ATH-M50). Especially at the sale price ($299), there really isn't a whole lot that beats them.

The sound quality is amazing, it is almost like stepping up again from to the M50. While it is not extremely open, there is a mod to replace the grills on the drivers with wire mesh that I will probably do that apparently fixes a lot of this, giving it a wider soundstage. The sibilance is not noticeable at all, even at high volumes. Note that these will need an amp and will greatly benefit from a DAC (I own the Schiit Modi 2/Magni 2).

The packaging was very nice, came with a leather box that flips open to reveal the headphones within. Shipping was very fast, arrived exactly when expected.

By Ethan on February 9, 2016

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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.