HiFiMAN EF400 front aerial view over white background
HiFiMAN EF400 direct front view over white background
HiFiMAN EF400 quarter angle over white background
HiFiMAN EF400 rear view of connections over white background
HiFiMAN EF400 profile over white background

HIFIMAN EF400 | Desktop DAC and Amp

Regular price $599.00 Sale price$399.00 Save 33%


Enjoy Massive Power and Superior Sound from the Sleek and Stylish HiFiMAN EF400 DAC Amp

  • Uses Himalaya R2R DAC
  • Provides great sound quality and plenty of power (4.4w per ch.) at a low price
  • Both Single-ended and Balanced outputs (6.3mm, 3.5mm, 4.4mm BAL, and XLR 4-pin BAL)

HiFiMAN EF400 amp with closed back headphones, stand and plant from Bloom Audio gallery

From HiFiMAN

In 2012, Dr. Fang Bian and his team at HiFiMAN introduced the EF6, the legendary desktop DAC and amplifier that delivered gobs of power for a wide, detailed soundstage.

Years later, HiFiMAN is proud to introduce a new model, the EF400 that incorporates the very best of recently developed technologies, highlighting their advanced HIMALAYA R2R DAC. The EF400 is the modern desktop DAC and Amp solution with a compact footprint and affordable price, but with sonics that outperform products many times its size.

HiFiMAN EF400 with HiFiMAN headphones in unfocused background

Full Balance

The four-channel differential structure features a DAC, buffer, and active filter that add up to unbeatable fully balanced output for stunning performance from a Class AB DAC and amp.

The differential amplifier circuit features a maximum output of 10.7 Vrms (THD <1%) on a 36Ω resistor equivalent load. The result: fully balanced output beyond compare.

HIFIMAN EF400 closeup of output connections


  • SN/R: 118 +/-3dB (A-Weighted)
  • THD+N (Line out): Between 0.002% and 0.004%
  • Channel Separation: 125 +/-3dB
  • Maximum Power Output: 4.4w per channel
  • Dimensions: 9.7" x 9" x 2.4" (247mm x 228mm x 61mm)
  • Weight: 6.8 lb (3.08kg)
  • Inputs: USB-B and USB-C
  • HiFiMAN EF400 User Manual
  • HiFiMAN 1 Year Manufacturer Warranty

Headphone Output

  • 3.5mm Single-ended
  • 6.3mm Single-ended
  • 4.4mm Balanced
  • XLR 4-Pin Balanced

Line Out

  • Dual XLR Balanced
  • Dual RCA Single-ended

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Customer Reviews

Based on 3 reviews
Exceptional value

Great sounding R2R Dac, powerful Amp. Punches way above it’s price point !!

Robert Guevara
Amazing value, very satisfied!

Pairing this amp with my Meze Elites is just incredible. Prior, I have heard the Elites on a Cambridge Dacmagic 200m and a FiiO k5pro ess. The sound from this amp is just heavenly paired to the other amps listed. I understand now what they mean regarding soundstage, tonality, depth and so on. So easy to get lost in the music. This really has everything sounding amazing and as I understand it both the cans and the amp will just get better with time.

Pros: Amazing R2R sound and price coming from ESS dacs & amps. Everything you need and nothing you don’t if you are simply hooking up to a comp or iPad via USBC. Great packaging for what it is in my opinion, everything appears to be high quality.

Cons: I have seen Hifiman around the forums about QC issues on lower end cans so reliability is a concern, especially with flagship headphones attached.

If this thing lasts forever, I wouldn’t feel an urge to upgrade as I don’t know how much better this can get! Great experience with Bloom as well, answered my email about a price match way outside of business hours and instantly had a link in my email. Will keep purchasing here for sure!

Christian Klingler

Highly recommended. Great build quality.

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