HIFIMAN EF100 + Beyerdynamic DT 880 Premium 250 Ohm

Hybrid Vacuum Tube/USB DAC Headphone Amplifier and Premium Dynamic Headphones

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Hybrid Vacuum Tube/USB DAC Headphone Amplifier for High Performance Headphones
Quantity: 1

General Features:

  • Premium audiophile hybrid vacuum tube headphone amplifier
  • Features 3 independent amplifier sections:
    • Vacuum tube input stage that functions as a preamp
    • Class AB headphone amplifier
    • Class T speaker power amplifier
  • Listen through your favorite headphones or a pair of speakers
  • Integrated 3.5mm, stereo RCA and type B USB inputs
    • USB input and built-in DAC allow you to stream CD quality music from your computer
  • Full size front stereo headphone output
  • Binding post speaker connectors
  • Vacuum tube input stage brings warmth, detail and spaciousness to your music
    • Utilizes a single 6N3J dual triode vacuum tube input stage
  • High output headphone amplifier designed for use with high performance headphones like the HiFiMAN HE-560 and HiFiMAN HE-6
    • Class AB solid state design
    • Output Impedance: 32-300 ohms
      • Output at 32 ohms: 7.8V, 2W
    • Signal-to-Noise Ratio: 95dB
    • Frequency Response: 20-20,000 Hz
  • Drives speakers with moderate to high efficiency levels
    • Class T solid state design
    • Power Output: 4.5W x 2 into 4 ohms
    • Frequency Response: 20-20,000 Hz
  • Dimensions: 7-7/8"W x 10-3/4"D x 3-3/4"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

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

Also found as: EF100

Beyerdynamic DT 880 Premium 250 Ohm

250 Ohm for Home Hi-Fi Systems with Semi-Open Back Premium Dynamic Headphones
Quantity: 1

Product Features
  • Semi-open meshed back achieves a balance between the best qualities of open and closed back designs
  • Durable and comfortable soft headband pad construction
  • Single-sided cable reduces clutter
  • Precise sound location creates a convincing atmosphere
  • Gold-plated 1/8" mini stereo jack plug (3.5 mm) and 1/4" adapter (6.35 mm)
Technical Specifications
  • Powerful dynamic drivers
  • Semi-open earpieces combine the best open and closed designs
  • Frequency response: 5 - 35,000Hz
  • Nominal impedance: 250 Ohms
  • Sensitivity: 96 dB
  • THD: <0.2%
  • Power handling capacity: 100mW
  • Circumaural, over-ear design for superior sound isolation
  • 9' - 10-1/9" straight cable connection
  • Gold-plated 1/8" mini stereo jack plug (3.5 mm) and 1/4" adapter (6.35 mm)
  • Replacement ear cushions available
  • Authorized Internet Dealer
  • 2-Year Manufacturer's Warranty
  • Part Number: 481793
Other Versions
  • 32 Ohm Model is perfect for portable devices such as an iPod or cell phone.
  • 600 Ohm Model is ideal for use with a high quality headphone amp or home receiver

Headphone Amplifier Specifications

Digital-to-Analog Converter (DAC)
A Digital-to-Analog converter (also known as a DAC) converts a digital audio signal into an analog signal. This is especially helpful for listen to music from digital sources, such as iPods and smart phones.
Frequency Response
The range of frequencies the amplifier will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
20 - 20000 Hz
Input Connection
This is the manner in which the headphone amplifiers receive an input audio signal.
Stereo RCA
Output Connection
This is the manner in which the headphone amplifier will output the audio signal.
1/4" Plug
Number of Outputs
Some headphone amplifiers have a built-in splitter so multiple pairs of headphones can be connected to it. The number specified here is the number of headphones that can be connected to the amplifier.
The width of the item from left to right (side-to-side) measured in inches.
The height of the item, measured from top to bottom, in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
Amplifier Style
Some headphone amplifiers are designed to be portable and others are meant to be placed on a desk. This will tell you what style of amplifier this item is.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: HIFIMAN EF100 + Beyerdynamic DT 880 Premium 250 Ohm

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HIFIMAN EF100 + Beyerdynamic DT 880 Premium 250 Ohm

Hybrid Vacuum Tube/USB DAC Headphone Amplifier and Premium Dynamic Headphones


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