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About HIFIMAN
Founded by Dr. Fang Bian in 2007, HIFIMAN is widely regarded as one of the leading manufacturers of high performance headphones and portable audio products. HIFIMAN is especially known for its critically-acclaimed Planar-Magnetic headphones that feature state-of-the-art driver technology. The company also designs and manufactures world-class dynamic in-ear drivers which have also garnered awards and rave reviews
HIFIMAN EF400DAC & Amplifier
Massive Power and Superior Soundfrom a Sleek and Stylish Chassis
- The Modern Desktop DAC/Amp Solution-Compact yet Powerful
- Award-winning HIFIMAN HIMALAYA R2R DAC
- Full Balance Output
- Specifications：
- Maximum Power Output: 4.4 W per channel
- Dimensions: 246.5mm(L)x228mm(W)x61mm(H)
- Weight: 3.08kg
Experience the prized performance of the R2R DAC
A rare treat made possible by HIFIMAN
HIFIMAN HIMALAYA DAC: Recipient of 2022 VGP Gold Technology Award (Japan)
The Modern Desktop DAC/Amp Solution
Compact but with sonics that outperform products many times its size
In 2012, Dr. Fang Bian and his team at HIFIMAN introduced the EF6, the legendary desktop DAC/amplifier that delivers gobs of power for a wide detailed soundstage. Ten years later, HIFIMAN is proud to introduce a new model, EF400, that incorporates the best of recently developed technologies, especially the company's advanced HIMALAYA R2R DAC.
Unbeatable fully balanced output for stunning performance
The four-channel fully differential amplifier circuit features a maximum output of 10.7 Vrms (THD<1%) on a 360 resistor equivalent load.
- Signal to Noise Ratio: 118+/-3dB (A Weighted)
- THD+N(Line out): Between 0.002% and 0.004%
- Channel Separation: 125+/-3dB
Jags
Reviewed in the United States on March 25, 2025
After doing a lot of research online, I was told there would be little reason to buy more expensive dac amps over the K5 Pro that I already own, but surprise surprise, the EF400 made my Planar's sound way better in terms of bass and fullness. I didn't think it would be drastic but A-B testing between both units made it clear enough that it was worth the upgrade. It's also pretty simple to setup and use, I didn't even bother with drivers since it was plug and play. When it came to gaming and watching stuff, as expected it performs exceptionally well. I used High Gain Over Sampling on the Left Knob for Planars and it sounds perfect. Make sure your windows volume is set to 100% and then adjust the Right Knob for volume carefully because this thing can get dangerously loud. Overall very satisfied and I will update this review if this thing dies randomly.
Anke Baumgarten
Reviewed in Germany on February 5, 2025
Leider war erst mein 2. EF400 ohne Probleme. Der erste hatten eine deutlich Imbalance in den Kanälen, wobei der linke Kanal hörbar lauter war. Selbst wenn der Lautstärkeregler auf 0 war, hat man auf dem linken Kanal noch etwas gehört. Scheut euch also nicht davor, ruhig noch einen 2. EF400 zu probieren, falls der erste Probleme macht.Ich nutze den EF400 mit einem HE1000 Stealth und es ist für mich eine super Kombination, weil er dem HE1000 Stealth etwas die Schärfe in den Höhen nimmt. Für den HE6SE V2 hat er vllt. gerade so genug Power, wenn man keinen EQ mit Preamp > -4-5db braucht. Mir war der HE6SE V2 in manchen Situationen etwas zu leise am EF400 (aufgrund meiner Preamp Einstellung). Das ist für mich aber kein Grund hier ein Stern abzuziehen, da der HE6SE V2 eh pervers viel Leistung braucht und ich gern laut höre. Nutze ihn meist im OS Mode mit low gain (zumindest am HE1000).Ansonsten finde ich auch das Design und die Verarbeitung des EF400 sehr gelungen. Er ist schwer, sieht wertig aus und ist schön schlicht. Es gibt andere DAC-AMPs, die wahrscheinlich besser "messen", aber ich finde den EF400 super musikalisch und vermisse nichts. Zu den Anschlussmöglichkeiten: Ja, da gibts nicht viele. Aber das weiß man auch vor dem Kauf. Insofern gibts auch da nichts zu meckern.
John
Reviewed in Canada on February 10, 2025
This amplifier came out years ago and although it got rave reviews it had several issues which I am glad to report have all been fixed. I will admit I purchased a refurbished one and it was in excellent condition so I saved a couple hundred bucks. Thanks Amazon. If you have hifiman planars this amp is for you. That R2R dac along with descrete amp is a stunning. My Ayra organics sound unbelievable. These things are known for brightness and not in a good way but the pairing here is straight from heaven. Awesome value!!
Marco Chiariotti
Reviewed in Italy on August 19, 2024
E' da un pò di tempo che osservavo, tra i prodotti simili di questa fascia di prezzo, questo particolare dac/ampli cuffia, di cui ho letto molte recensioni in rete. Non che ne avessi una reale necessità, lo avrei comunque preso se ne avessi trovato uno d'occasione.Finalmente l'occasione è capitata con il 'seconda mano' di Amazon che mi ha permesso di acquistarlo quasi alla metà del prezzo approfittando di uno sconto ulteriore per un periodo limitato.Avendo però letto diverse lamentele riguardo difetti più o meno gravi riscontrati, e considerando che sul 'seconda mano' di Amazon ce ne sono sempre diversi, per prima cosa ho cercato di capire se fosse stato restituito proprio a causa di uno di questi difetti.Elenco di seguito tutti i problemi che ho trovato descritti:- sbilanciamento tra i due canali a bassi livelli di ascolto,- potenziometro del volume gracchiante,- disturbi audio in modalità NOS per lo più con file 16bit 44kHz,- trasformatore toroidale ronzante,- bassa potenza di uscita riscontrata da qualcuno,- infine, un grave difetto di sfasamento tra i due canali fino ad arrivare quasi all'opposizione di fase ad alte frequenze (difetto riconosciuto da Hifiman a gennaio 2023 che ha portato al richiamo di alcuni esemplari), che dovrebbe portare ad un suono confuso, non a fuoco e non definito alle alte frequenze.Non ho riscontrato alcuno di questi difetti. Ho anche contattato il supporto Hifiman per verificare che l'esemplare in questione non fosse tra quelli richiamati, fornendo il numero di serie. E' risultato prodotto ad agosto 2022 e non tra i modelli interessati dal difetto ("oste, è buono il vino?").In ogni caso non ho riscontrato alcunchè di anomalo (anche se non ho orecchie estremamente audiofile).Quello che posso confermare, e di cui qualcuno si è lamentato, è che la manopola del volume è molto 'leggera', basta quasi sfiorarla per ruotarla. Se siete abituati a manopole che offrono molta resistenza, può non piacere.Non elenco qui tutte le caratteristiche perchè si trovano decine di recensioni approfondite in rete, mi limito a puntualizzare la buona costruzione e l'essenzialità del prodotto (solo ingresso USB e solo segnali PCM, fino a 24bit, niente DSD, niente display).Una particolarità: le quattro uscite cuffie sul frontale hanno impedenze diverse, Hifiman riporta che le uscite jack 6,35mm (sbilanciata) e XLR (bilanciata) sono adatte per cuffie a bassa sensibilità, mentre le uscite jack 3,5mm (sbilanciata) e 4,4mm (bilanciata) sono più adatte a cuffie ad alta sensibilità (insieme alle modalità a basso guadagno).La cuffia con cui principalmente userò l' EF400 è una Hifiman Sundara e direi che l'accoppiamento è piacevolissimo, per cui in definitiva sono pienamente soddisfatto, ancora di più in relazione al prezzo pagato.
sonicd0012
Reviewed in the United States on March 27, 2024
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わっしょい
Reviewed in Japan on December 9, 2024
【外観】写真だとシンプルな外観ゆえにチープな印象を受けましたが、手に取ってみると非常に剛性があるので、高級感が感じられます。また、ボリュームノブは発売当初の海外レビューだと「軽すぎる」と指摘されていましたが、その後改善されたのか個体差かは判りませんが、それなりに重たさを感じられ回し心地は良かったです。【音の感想】全体的にパワフルでありつつも、空間表現や音の聞こえ方が自然です。 以下、帯域ごとの感想・高音マイルドでとにかく嫌な音を出さない音造り。特筆して良いとかは無いけど自然に伸びる感じ。・中音ボーカルは少し奥に自然に定位している。にも関わらず、声の線が太い為、厚みたっぷりで聞かせてくれる。全体的に艷やかで生々しく、聴き応えがある。・低音厚みと深みあって、ほどよいパンチ。それでいて他の帯域を邪魔しない絶妙なバランス。イヤホンで聴いてもヘッドホンのような立体的な低音を出してくれる。キレよりは余韻重視で丁寧に広がる感じが病みつきになりそう。・音場かなり広い。薄っぺらく広げた感じではなく、広大な音場の中で濃厚な音が鳴っている。高感度のイヤホンでもホワイトノイズはありませんでした。今のところ満足感は非常に高いです。
Rafa
Reviewed in Spain on November 23, 2024
Al conectarlo a la red no daba señal
DeJuan R Skelton
Reviewed in the United States on February 22, 2023
Would be well worth it if it lasted past 50 hours of use. I bought a unit and it drove my planars really well and sounded really good until about 50 hours into my burn-in period, then static/ distortion presented in the right channel. Power cycled, disconnected, reconnected, turned Roon off and on etc. problem persists. Will be returning. This was connected via USB C to MacBook Pro using Roon, listening with Arya v2. I am going to chalk this up to low quality caps which I have read were used in the build. I will look for a different R2R solution to compliment my X16/ A90 stack.
Jack
Reviewed in the United States on September 5, 2022
This unit must be used with a PC source. When connected to my iPad Pro as a source, NOS mode produces crackling noises throughout any CD-quality tracks. Engaging OS mode makes the crackling go away, but NOS is the preferred mode for myself and most other EF400 owners. After contacting Hifiman, they say there is no fix for this nor any firmware update in the works. The device does not appear to be firmware updatable at all. That being said, it does have a great sound and is a great performer despite this annoying issue. I prefer using my iPad Pro as a source over my gaming PC as it is cleaner and quieter source, and it works perfectly with all my other DACs and DAC/Amps. There is a quirk with this device with its NOS mode for 44.1 sample rate tracks when connected to lower powered source devices such as iPads, so be aware of this and only purchase if you're planning to use with a PC/Mac source.UPDATE: I figured out how to fix the NOS mode buzzing issues, which seem to only happen on CD quality tracks when using an iPad or iOS device as source. The way to fix it is to use Roon and turn on Sample Conversion and set it to Max. I went back and forth turning it on and off and it really does work, made the buzzing go away, and the buzzing comes back when you turn it off. Glad I finally found a workaround. Still was not convenient and cost me extra to purchase Roon.
A. Barrett
Reviewed in the United States on November 8, 2022
Up till this point my setup has been FIIO K9 Pro (AKM), Audeze LCD-X, Hifiman Arya SE. I've enjoyed the K9 Pro since Jan 2022. It's been awesome. Super clear, very detailed, fantastic for classical & New Age music. When it comes to Jazz it struggled with my ears. I had to revert to EQ to assist with that but never quite nailed it.Introducing EF400. WOW! The warmth and engagement this DAC/AMP brought to the party is amazing. I've let this thing run for 24 hrs straight before deciding I couldn't wait any longer to listen. Started playing Marc Antoine, Paul Brown, David Benoit and many more. My head was just bopping.Now, per the audio reviewers in YouTube, they were correct in terms of your top of the line (under $1000) Delta Sigma DACs, they sound clearer, and crisper to me (K9 Pro reference) but EF400 has the emotional magic. This maybe my goto for Jazz and pop going forward, where the K9 will remain the goto for classical, New Age music.I may come back with more updates as I continue to experiment. Looking forward to testing Classical crossovers with Pop and Rock. Hifiman, well done!!!
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