Design and features:This home/studio-style over-ear model has an open-air design that doesn't muffle outside sounds, so you'll be able to hear external sounds, such as a doorbell or car horn, when you are wearing the headphones. The headphones have low sensitivity, so while they can provide satisfying volume levels with home audio equipment and higher-powered portable audio devices, they may not be a good match for lower-powered portables. This model comes with detachable 58-inch audio cable and a mini-plug-to-1/4-inch-plug adapter.
Sound quality: The HE-400i delivers excellent overall sound, with a warm character. Bass has good impact and definition, and goes deep. Midrange is generally nicely balanced, full-bodied, and highly detailed, but the upper midrange is a bit dark. Treble is extended but very slightly recessed. The overall sound has good dynamics, and is open throughout the upper-bass and most of the midrange, but somewhat closed-in sounding in the upper midrange, and lacks treble air. The HE-400i has a sound that is similar to the HE-400s that is also covered in the Ratings, but HE-400i is a bit smoother throughout the midrange and the tonal balance is a little warmer (fuller) overall than the HE-400s.
Comfort: We found that these headphones produce a sense of moderate pressure around the ears, and the earpads may feel hot after prolonged use.
