Julie Mullins has posted a review of the HiFiMAN HE400S headphones ($299) at The Absolute Sound. His conclusions:
“There was a kind of effortlessness to their playback, with a largely neutral presentation that was crisp, clean, and open. Quite often, their dimensionality even resembled loudspeaker-style soundstaging. These phones would make a great choice either for hi-fi fans on a budget or for audiophiles who are simply after a basic, high-quality, lightweight headphone for go-to convenience or travel.”
You can read the full review here.
You can find links to more reviews of the HiFiMAN HE400s headphones here.