The HIFIMAN HE-X4 ranks #33 out of 308 total Over-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: HIFIMAN
Prices on this page were last checked October 12, 2026 at 4:13 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
As an eBay Partner, we may be compensated if you make a purchase.

#33 HIFIMAN HE-X4 Discontinued eBay
Pros: Measured response gives it an excellent Harman preference score of 88 with a 2.03 dB spread.
Cons: Discontinued, so it is mainly found used. Sub-bass is 8.4 dB short at 30 Hz, so deep bass lacks rumble.
| Released | May 2021 (5 years ago) |
|---|---|
| Back | Open |
| Connection | Wired |
| Deviation From Target | 2.03 dB standard deviation |
| Driver Type | Planar magnetic |
| Form Factor | Over-ear |
| Frequency Response | 20Hz - 20kHz |
| Harman Preference Score | 88 (measured by oratory1990, via AutoEQ) |
| Impedance | 25 ohms |
| Sub-bass Extension | Falls 6 dB below target at 47 Hz (-8.4 dB at 30 Hz) |
| Tonal Tilt | -0.09 (negative is warmer, positive brighter) |
| Weight | 0.9 lbs (420g) |
EQ preset to match the Harman target
Set a preamp of -6.3 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +6.5 dB | 0.70 |
| Peak | 73 Hz | -2.7 dB | 1.15 |
| Peak | 1,909 Hz | +5.4 dB | 2.30 |
| Peak | 909 Hz | -2.6 dB | 2.50 |
| Peak | 236 Hz | -2.1 dB | 0.75 |
| High shelf | 10,000 Hz | -3.9 dB | 0.70 |
| Peak | 4,259 Hz | +2.5 dB | 4.20 |
| Peak | 3,059 Hz | -1.1 dB | 3.88 |
| Peak | 5,435 Hz | -0.9 dB | 5.85 |
| Peak | 6,777 Hz | +1.3 dB | 5.95 |
- Reviews, Comparisons and Sound Samples