HIFIMAN EF400 Desktop Balanced Headphone DAC& Amplifier with Himalaya R2R DAC, 3.5/4.4/6.35mm Output for Home Audio
Best for
Best for hard-to-drive headphones
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$399.00
Updated Jun 27, 2026 · 1 min read
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
The HIFIMAN EF400 is the most ambitious desktop unit in this group, built around an R2R Himalaya DAC with balanced architecture and 3.5mm, 4.4mm and 6.35mm outputs, positioning it for power-hungry planar and high-impedance headphones. Verified-purchase reviewers give it a 4.1 average, the lowest of our picks, on a relatively small review base. The softer rating, combined with the absence of any independent measurements or specialist-community signals in the supplied data, means this pick carries more uncertainty than the others.
What reviewers liked
- R2R DAC and balanced desktop design aimed at demanding headphones
- Full output suite (3.5mm, 4.4mm, 6.35mm) for flexibility
- Targets a real gap for hard-to-drive planar and high-impedance cans
Where it falls short
- Lowest verified-purchase average (4.1) among the ranked picks
- Small review base and no independent measurements in the supplied data
- Higher price increases the risk given the softer, thinner signal
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The HIFIMAN EF400 is the most ambitious desktop unit in this group, built around an R2R Himalaya DAC with balanced architecture and 3.5mm, 4.4mm and 6.35mm outputs, positioning it for power-hungry planar and high-impedance headphones. Verified-purchase reviewers give it a 4.1 average, the lowest of our picks, on a relatively small review base.
The softer rating, combined with the absence of any independent measurements or specialist-community signals in the supplied data, means this pick carries more uncertainty than the others. It earns inclusion for a genuinely distinct strength, desktop power and an R2R conversion approach for demanding headphones, but prospective buyers should weigh the mixed customer sentiment and seek out measured reviews before committing at this price point.
- Massive power and superior sound from a sleek and stylish chassis: The EF400 is the modern desktop DAC/Amp solution, with a compact footprint and price to match, but with sonics that outperform products many times its size. Ultra-high efficiency and low power consumption at maximum stability:4.4W per channel balance output. Embedded with HIFIMAN HIMALAYA R2R DAC- Recipient of 2022 VGP Gold Technology Award (Japan).
- Experience the prized performance of the R2R DAC
- HIMALAYA is a discrete R2R DAC (digital-to-analog) module that is based on the FPGA algorithm. The combinations of its low audio frequency range, out-of-band noise, and low energy consumption make it a perfect match for high-performance audio equipment. The HIMALAYA DAC module supports the standard PCM music signal transmitted by the most common IIS (Integrated Interface of Sound) audio interface, with a maximum resolution of 24Bit.
- 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/amplifier. The four-channel fully differential amplifier circuit features a maximum output of 10.7 Vrms (THD<1%) on a 36Ω resistor equivalent load. The result: fully balanced output that is beyond compare.
- 4-level Function Switch
- High Gain NOS, High Gain OS, Low Gain OS, Low Gain NOS ★Headphone Out (Front Panel): 6.35mm Single-ended; 3.5mm Single-ended; 4.4mm Balanced; XLR 4-Pin Balanced Output. ★Line Out (Rear Panel): CANNON Balanced Output; RCA (Single-ended).★ Input: USB Type C; USB-B
- 110V
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