HIFIMAN HE400i Headphones and EF100 USB-DAC Hybrid Tube Amplifier Bundle

HIFIMAN HE400i Headphones and EF100 USB-DAC Hybrid Tube Amplifier Bundle

HIFIMAN HE400i Headphones and EF100 USB-DAC Hybrid Tube Amplifier Bundle

B&H # HI400IEF100C MFR # HE400I EF100 COMBO
No Longer Available

Product Highlights

  • HE400i Planar Magnetic Headphones
  • EF100 USB-DAC Tube Headphone Amplifier
  • Circumaural Open-Back Design
  • Single-Sided Planar Magnetic Drivers
  • Frequency Response: 20 Hz to 35 kHz
  • Vacuum Tube with Solid-State Technology
  • Desktop Design
  • USB and RCA Inputs
  • Detachable Cable
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HIFIMAN HE400i overview

  • 1Description

The HIFIMAN HE400i Headphones and EF100 USB-DAC Hybrid Tube Amplifier Bundle matches the HE400i single-ended planar magnetic headphones with the EF100 USB-DAC hybrid tube headphone amplifier to provide audiophiles with high-quality audio from a variety of sources, for critical listening at home or the office.

Lightweight and comfortable, the circumaural open-backed HE400i headphones feature single-ended planar magnetic drivers, which deliver a heightened soundstage and spacial imaging. The EF100 amplifier combines tube and solid-state technology to provide a warm and nuanced sound. It accepts audio from CD and portable players and connects to your computer via USB, allowing you to listen to your music via the integrated DAC. The amplifier is also capable of powering speakers of moderate to high efficiency.

  • HE400i Single-Ended Planar Magnetic Headphones

    Designed for both home use and critical listening in the studio, the HE400i Single-Ended Planar Headphones from HIFIMAN are equipped with single-ended full-size planar-magnetic drivers that provide an accurate response and wide spatial imaging. The large planar-magnetic drivers are designed to provide excellent transient response and sound quality.

    Easy-to-drive single-ended planar magnetic driver for critical listening at home or in the studio
    Planar magnetic technology provides accurate transient response and sound quality
    Sensitivity of 93 dB allows the headphone to be driven with a modest-size amplifier or used with smartphones and portable
    audio players
    ABS polymer ear cups in a gloss charcoal finish
    Pressure pattern designed to provide comfort
    Beveled earpads made of pleather and velour also provide comfort and high sound quality
    Quick response time due to lightweight diaphragm design
    Detachable cable that attaches using 2.5mm connectors
    1.5m cable with 1/8" connector, includes 1/4" adapter
    UPC: 720189879586
  • EF100 Hybrid Headphone Amplifier

    The HIFIMAN EF100 Headphone Amplifier is a powerful hybrid headphone amplifier and integrated amplifier. Housed in a compact chassis, it has three independent amplifier sections: a vacuum tube input stage that works as a shared preamp, a Class AB headphone amplifier, and a Class T speaker power amplifier. Benefitting from vacuum tube technology, both headphone amplifier and power amplifier sound warm, smooth, and detailed.

    Working as a hybrid headphone amplifier, EF100 Amp produces a 2W output under a 32 ohm load, so it can easily drive many high-performance headphones. In addition, this amp can also serve as a hybrid power amplifier to drive speakers of moderate to high efficiency. In integrated/power amplifier mode, the amplifier output line is fully independent from the digital amplifier line used in the headphone amplifier.

    Driven by front stage’s vacuum tubes, the EF100 Amp combines the warmth of the vacuum tubes with the high efficiency of a digital amplifier. When the amp is used as a power amplifier, it can give 4.5W per channel, so it can drive HIFI speakers of moderate to high efficiency. With its versatile design, the EF100 Amp can deliver remarkable sound from a variety of sources for both headphones and speaker applications.

In the Box
Bundle Items
  • 1/4" Adapter
  • Leatherette Presentation Case
  • Limited 1-Year Warranty
  • Limited 1-Year Warranty
Table of Contents
  • 1Description
  • HE400i Single-Ended Planar Magnetic Headphones
    Design Over-Ear (Circumaural)
    Frequency Response 20 Hz to 35 kHz
    Sensitivity 93 dB
    Impedance 35 Ohms
    Audio Connector 1/8" (3.5 mm)
    Cable Length 4.9' /  m
    Weight 13.1 oz / 370 g 
    Packaging Info
    Box Dimensions (LxWxH) 12.4 x 10.4 x 7.0"
  • EF100 Hybrid Headphone Amplifier
    Voltage 110 / 220 VAC
    Input Impedance 47 kOhms
    Output Impedance 32 to 300 ohms
    Headphone Amplifier
    Headphone Output 7.8 V, 2000 mW (output voltage and output power under 30 ohms load)
    Frequency Response 20 to 20 kHz +/- 0.2 dB
    Power Amplifier
    Amplifier Output Power Each Channel: 4.5 W (4 ohms load)
    Frequency Response 20 to 20 KHz +/- 1 dB
    S/N 95 dB
    Tube 6N3J
    Dimensions 13.4 x 10.2 x 2.55" (340 x 258 x 65.0 mm)
    Weight 6.6 lb (3.0 kg)

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