Hello there friend and Welcome aboard!!

Before we get into the HIFIMAN HE400i Review, grab a snack, sit back and relax because..

You’ve come to the right place!!

What I will bring you in this review

  1. Ratings/Price
  2. Specifications
  3. Summary
  4. Pros
  5. Cons
  6. Video Review
  7. Amp/DAC requirements
  8. Who these headphones benefit?
  9. Consensus/Conclusion
  10. Final Word

Now without further ado, let’s get rolling!






  • Type: Planar Magnetic
  • Fit: Circumaural
  • Impedance: 35 Ohm. What is Headphone Impedance?
  • Sensitivity: 93dB
  • Sound Output: Stereo
  • Frequency Response: 20Hz-35kHz
  • Material: ABS Plastic, Polymer
  • Weight: 370g
  • Inputs Supported: 3.5mm, 1/4″
  • Cable Length: 1.5m
  • Additional Features: Detachable Cable


The HIFIMAN HE400i’s are quite a strange animal. Comfort wise, they’re excellent, although the pads will flatten out over time. Build quality is also very rugged and sturdy, and I love the rotating ear cups. The design of the headband is similar to that of the AKG line. It’s a sort of hammock for your head homie! It really works well. The ear-pads are also just a tad small, I agree with Z reviews; I wish they were a little bigger and more oval shaped. It’s kind of nitpicking though.

Sound wise is where it gets interesting for me. I love the crisp attention to detail that these cans provide, and unlike the Audeze LCD3, I don’t feel like it’s laborious or exhausting. There’s enough clarity to really make you stop and analyze the music in a pleasant way.

What really stood out to me was the Timbre of the instruments. What is Timbre? It’s like I discovered this newfound appreciation for how an instrument or a band is truly supposed to sound. Here’s the best way I can describe what I experienced:

The Experience

It’s like a blanket was taken off of certain aspects of the recording. Imagine the true character of a person, the stuff we don’t see, the condition of their heart. This became especially apparent on Led Zeppelins “Over the hills and far away.” It was like hearing the song in an entirely different light. Granted I was plugged up to a nice amp (an Oppo of some sort), and I’m sure the source file was immaculate, but I just couldn’t believe it. People talk about laser like precision with the 600’s (which is true), but this took it to a new level. It was as if the guitars actually had a true personality in and of themselves. Like you were connecting with Pages heart (and the band as a whole for that matter) on some level. Like all our lives we always hear music, but this was more than just hearing. It was more of an enlightenment of sorts. And no I wasn’t high. 😛

Pink Floyd

Another example of this came on Pink Floyd’s “Time.” Unfortunately, this experience was neither bad nor good. It was more revealing than anything. I’ve heard the song probably over a thousand times, but it sounded different this time. Those jangly guitars started to really stand out, and not necessarily in a good way. It was as if someone stripped David Gilmour naked and exposed him. Don’t get me wrong, the guitars didn’t sound bad. But they had this raw energy that’s hard to put into words. I could hear them so clearly that it was almost scary. In the past, I kind of knew they were there, but the way they came off was muffled, perhaps a bit distant. But here, they almost take center stage and demand that you pay attention to them. They want you to notice how fast they are and how much texture they’re able to discern for you. Like a painter?
In a nutshell, that’s what the 400i’s are like. They demand attention. In a way, it’s sort of like a high maintenance girlfriend. 😀 I’ll leave it at that.


  • Crisp detail, clarity. Extremely accurate sound representation.
  • Great mid-range. Extremely intimate and realistic.
  • Phenomenal instrument separation and precision.
  • Great Timbre.
  • Articulate bass, but not over done.
  • Good Soundstage. It’s not going to blow you away though. Like the HD 600’s, you will occasionally pause the song to make sure no ones in your house. Lol. What is Soundstage?
  • Nice packaging.
  • Smooth, well extended treble with a bit of sparkle.


Video Review

Amp/DAC requirements

They do pretty well without an amp coming it at 35 Ohms impedance (What is Headphone Impedance?), but I would definitely pair these babies up with one to get the best sound. How to choose a headphone amp!

I personally used them with the magnificent Schiit Magni/Modi combo. See my Magni 2 vs. Magni 2 Uber comparison!!

Who these headphones benefit?

These headphones will sound good with most any genre. I find them to be fantastic with Rock predominantly.

Endorsed for:

  • Jazz
  • Acoustic
  • Instrumental
  • Classical
  • Electronica
  • Techno
  • Pop
  • Dance
  • New Age
  • Ambient
  • Vocals
  • Violin
  • Guitar
  • Piano
  • Rock (Classic & Modern)
  • Gaming


Intimate and warm, while still somehow retaining a sense of articulation, detail, and clarity. Crystal clear sounding mid-range that can be very revealing at times. Comfortable and durable. Nice bass extension and a treble that sparkles. Can be sibilant at times.

Final Word

I really love the HE400i’s, but I like the 600’s just a hare better. Why? Because the HD600’s mid-range is more resolving, and I prefer a cleaner sound as opposed to a warmer one. By contrast, the 400i doesn’t sound quite as clear or refined when stacked against the 600. Also, the HD600 represents a true A+ price to performance ratio, and still remains a Gold Standard to this day. Interested in learning more about it in the most detailed and informative review I’ve written? Check out:


Still curious about the phenomenal 400i?


Well that’s about it for today my friend! I hope you’ve enjoyed this HIFIMAN HE400i review.

Questions? Comments? Requests? Did I miss the mark on something? Please let me know down below or Contact me!!

Are you likely to purchase the 400i? What about the HD600? I would love to hear from you. Until next time..

All the best and God bless,





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Build Quality


    Sound Quality







          • Intimate and detailed
          • Comfortable
          • Durable
          • Mid-range


          • Can be sibilant