Drop X HiFiMAN HE-X4 Review - Deja Vu... or maybe not?

Drop X HiFiMAN HE-X4: https://drop.com/buy/drop-hifiman-he-...
HE-X4 Frequency Response & Discussion: https://forum.headphones.com/t/drop-x...
HiFiMAN HE400se: https://store.hifiman.com/index.php/h...
HE400se Review:    • HiFiMAN HE400se Review - Baby Sundara  

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How to read frequency response:
   • How to Read Frequency Response Graphs for ...  
Become an expert on headphones: https://www.headphones.com/pages/rese...
Learn about headphone measurements and frequency response: https://www.headphones.com/pages/meas...
How frequency response impacts sound signature: https://www.headphones.com/pages/how-...
Podcast: https://theheadphoneshow.fireside.fm/
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Source equipment
Amp - SPL Phonitor X: https://www.headphones.com/products/s...
Amp - Cayin IHA-6: https://www.headphones.com/products/c...
Amp - Schiit Magni Heresy: https://www.schiit.com/products
Amp - Drop THX AAA One: https://drop.com/buy/drop-thx-aaa-one...
Amp - Ampsandsound Kenzie OG: https://ampsandsound.com/products/ken...
DAC - Soncoz LA-QXD1: https://hifigo.com/products/soncoz-la...
DAP - iBasso DX220: https://www.headphones.com/products/i...
DAC - Matrix Audio X-Sabre Pro: https://www.headphones.com/products/m...

Headphone Recommendations:

Entry level
AKG K371: https://www.akg.com/Headphones/Profes...
Sennheiser HD 560S: https://www.headphones.com/products/s...
Sennheiser HD6XX: https://drop.com/buy/massdrop-sennhei...

Midrange
HiFiMAN Sundara: https://www.headphones.com/products/h...
Focal Elex: https://drop.com/buy/massdrop-x-focal...

High End
Audeze LCD-2 (with EQ): https://www.headphones.com/products/a...
Audeze LCD-X and XC: https://www.headphones.com/products/a...
Focal Clear: https://www.headphones.com/products/f...
HiFiMAN Arya: https://www.headphones.com/products/h...
Sennheiser HD 800S: https://www.headphones.com/products/s...
ZMF Auteur: https://shop.zmfheadphones.com/collec...
HEDDphone (heavy): https://www.headphones.com/products/h...

Very high end
Rosson Audio RAD-0: https://www.headphones.com/products/r...
ZMF Verite Closed: https://shop.zmfheadphones.com/collec...


Summit
Focal Utopia: https://www.headphones.com/products/f...
HiFiMAN Susvara: https://www.headphones.com/products/h...

IEM Recommendations:
Moondrop Blessing 2: https://www.headphones.com/products/m...
Moondrop Blessing 2 Dusk: https://shenzhenaudio.com/products/mo...
DUNU SA6: https://www.headphones.com/products/d...
Thieaudio Monarch: https://www.headphones.com/products/t...
Campfire Andromeda 2020: https://www.headphones.com/products/c...
64 Audio U12t: https://www.headphones.com/products/6...
Empire Ears Odin: https://www.headphones.com/products/e...

00:00 - Intro
00:42 - Just a Rebranded HE400se?
06:01 - Sound: Objective
07:03 - Sound: Subjective
08:20 - Tangibles: HE-X4 vs HE400se
12:02 - Value
12:39 - Conclusion