This is a review and detailed measurements of the Hifiman HE400SE open back planar magnetic headphone. It was sent to me by online seller,
Linsoul and costs US $149.
The HE400Se doesn't look fancy:
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It is however quite comfortable given its thick and large pads. Weight is a bit on the high side of average:
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Cups are round and symmetrical. Diameter is 61mm and depth is 21 mm.
The included cord is this thin, horribly coiled wire. I suggest replacing it with something seeing how it uses standard 3.5mm connectors at both ends.
Note: The measurements you are about to see are made using a
standardized Gras 45C.
Headphone measurements by definition are approximate and variable so don't be surprised if other measurements even if performed with the same fixtures as mine, differ in end results. Protocols vary such as headband pressure and averaging (which I don't do). As you will see, I confirm the approximate accuracy of the measurements using Equalization and listening tests. Ultimately headphone measurements are less exact than speakers mostly in bass and above a few kilohertz so keep that in mind as you read these tests.
If you think you have an exact idea of a headphone performance, you are likely wrong!
The large cups made an easy job of mounting them on my fixture and getting good measurements on first try.
Hifiman HE400SE Measurements
Let's start with our usual frequency response measurements:
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Other than bass and slight shoftall around 1.5 to 3 kHz, response complies with our target well. This means it should be usable without equalization. Developing filters should be easy given the deficiencies we need to fill:
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Distortion at all but the highest test level is quite low:
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Group delay shows messiness:
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Impedance is flat as is the case with planar magnetic headphones:
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Sensitivity is below average but not too bad:
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Hifiman HE400SE Listening Tests and Equalization
Measurements 100% predict the performance this headphone: it sounds very good out of the box and is definitely usable as is. Correction of the bass response does provide a warmer and more satisfying performance:
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And filling that dip centered around 2 kHz gave it excellent spatial qualities. Dial these in and you can sit back and enjoy your music as I did.
Conclusions
Headphone testing doesn't get simpler than this when the device itself is not too far off the mark as is the case with HE400SE. Add a bit of salt and pepper in the form of bass boost and lower treble energy and you are in business with a very high fidelity headphone. That it comes at such a low cost is a huge bonus, making the HE400SE one of my best picks for a bargain headphone.
I am happy to recommend the Hifiman HE400SE.
P.S. Linsoul listing says "V2." I am not sure if there is a V2 and if there is, that is what I have. I received this headphone back in July of this year.
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