HiFiMAN HE400se: https://www.headphones.com/products/hifiman-he400se-entry-level-planar-magnetic-headphones?_pos=1&_sid=734969078&_ss=r HiFiMAN HE400se Frequency Response & Written Impressions: https://forum.headphones.com/t/hifiman-he400se/12129 How to read frequency response: https://www.youtube.com/watch?v=nR2AhYqFI_8 Become an expert on headphones: https://www.headphones.com/pages/research Learn about headphone measurements and frequency response: https://www.headphones.com/pages/measurements-and-frequency-response How frequency response impacts sound signature: https://www.headphones.com/pages/how-frequency-response-impacts-sound-signature Podcast: https://theheadphoneshow.fireside.fm/ Twitter: https://twitter.com/headphonedotcom Twitter: https://twitter.com/ResolveReviews Source equipment Amp - SPL Phonitor X: https://www.headphones.com/products/spl-phonitor-x-headphone-amplifier?variant=376861360149 Amp - Cayin IHA-6: https://www.headphones.com/products/cayin-iha-6?_pos=1&_sid=41be6560e&_ss=r Amp - Schiit Magni Heresy: https://www.schiit.com/products Amp - Drop THX AAA One: https://drop.com/buy/drop-thx-aaa-one-linear-amplifier DAC - Soncoz LA-QXD1: https://hifigo.com/products/soncoz-la-qxd1-dac-fully-balanced-digital-audio-converters-with-xlr DAP - iBasso DX220: https://www.headphones.com/products/ibasso-dx220-digital-audio-player?_pos=1&_sid=24e0cbb9e&_ss=r DAC - Matrix Audio X-Sabre Pro: https://www.headphones.com/products/matrix-audio-x-sabre-pro-mqa?_pos=2&_sid=7f62f5062&_ss=r Headphone Recommendations: Entry level AKG K371: https://www.akg.com/Headphones/Professional%20Headphones/K371-.html Sennheiser HD 560S: https://www.headphones.com/products/sennheiser-hd-560s?_pos=1&_sid=6cc96eeef&_ss=r Sennheiser HD6XX: https://drop.com/buy/massdrop-sennheiser-hd6xx Midrange HiFiMAN Sundara: https://www.headphones.com/products/hifiman-sundara?_pos=1&_sid=0fc673fa4&_ss=r Focal Elex: https://drop.com/buy/massdrop-x-focal-elex-headphones High End Audeze LCD-2 (with EQ): https://www.headphones.com/products/audeze-lcd-2-high-performance-planar-magnetic-headphone-lambskin-leather?_pos=10&_sid=20f563872&_ss=r Audeze LCD-X and XC: https://www.headphones.com/products/audeze-lcd-x-high-performance-open-back-over-ear-reference-planar-magnetic-headphones-lambskin-leather?_pos=2&_sid=cc81c5eff&_ss=r Focal Clear: https://www.headphones.com/products/focal-clear-over-ear-open-back-headphones?_pos=1&_sid=c89ce8927&_ss=r HiFiMAN Arya: https://www.headphones.com/products/hifiman-arya?_pos=1&_sid=7c7f2eb6f&_ss=r Sennheiser HD 800S: https://www.headphones.com/products/sennheiser-hd-800-s-dynamic-open-back-stereo-headphones?_pos=1&_sid=eeaa647ba&_ss=r ZMF Auteur: https://shop.zmfheadphones.com/collections/stock-headphones/products/zmf-auteur HEDDphone (heavy): https://www.headphones.com/products/heddphone?_pos=1&_sid=14b0214ae&_ss=r Very high end Rosson Audio RAD-0: https://www.headphones.com/products/rosson-audio-design-rad-0?_pos=1&_sid=fc9369c25&_ss=r ZMF Verite Closed: https://shop.zmfheadphones.com/collections/stock-headphones/products/verite-closed Summit Focal Utopia: https://www.headphones.com/products/focal-utopia-open-back-over-ear-headphones?_pos=1&_sid=0135214bf&_ss=r HiFiMAN Susvara: https://www.headphones.com/products/hifiman-susvara?_pos=1&_sid=19a60f986&_ss=r IEM Recommendations: Moondrop Blessing 2: https://www.headphones.com/products/moondrop-blessing-2?_pos=1&_sid=7c10af5e6&_ss=r Moondrop Blessing 2 Dusk: https://shenzhenaudio.com/products/moondrop-x-crinacle-blessing2-dusk-1dd-4ba-in-ear-monitor-earphone DUNU SA6: https://www.headphones.com/products/dunu-sa6?_pos=1&_sid=ecf8336e1&_ss=r Thieaudio Monarch: https://www.headphones.com/products/thieaudio-monarch?_pos=1&_sid=fb8afd0bf&_ss=r Campfire Andromeda 2020: https://www.headphones.com/products/campfire-audio-andromeda-in-ear-headphones?_pos=1&_sid=f0d446275&_ss=r 64 Audio U12t: https://www.headphones.com/products/64-audio-u12t-universal-fit-earphone?_pos=1&_sid=bfdb9b1c2&_ss=r Empire Ears Odin: https://www.headphones.com/products/empire-ears-odin?_pos=1&_sid=d8794acd1&_ss=r 00:00 - Intro 00:36 - Specs, Build, Design & Comfort 05:07 - Sound: Objective 09:05 - Sound: Tonal Balance Summary 09:52 - Sound: Subjective 13:04 - Comparisons 16:14 - Conclusion