yes i think the headphone is worth the $400 asking price because of its fast speed and very detailed nature. However before the mod i didn't really like the headphone at all due to its presentation with music. The size of the driver renders a very large sound that is very impressive yet i found it to be overwhelming and the excessive body of the highs made it an incoherent headphone to me except with EDM. While it has a large soundstage the body of the sound is so large that it almost overwhelms the openness it offers. A headphones ability is not to be confused with how it actually presents the music. The Jerg mod opened the soundstage up a bit by taking away some of the thickness of the sound, opening it up a little bit and making the presentation more coherent and allowing the mid focus of the headphone to be more present. The headphone still screams EDM with the prominent non-airy highs with in your face transients that EDM calls for and that to me is why it is a $400 headphone and no more.
BTW i use a Schiit Asgard and a peachtree audio DAC *IT
Thanks for the review. I am leaning more towards the He-400 simply because driving an He-500 seems too complex/expensive. I am glad the He-400 is to your liking. Would you say the He-400's sound like cineplex movie audio? Do they give that deep bass and all that? Thanks.