HiFiMan HE400i Measurements A big thanks to uncola for sending these here. Remarkable consistency for an ortho. Low distortion Bass not as taut as original HE-400, but better than HE-500. "Fun" U-shaped signature without overbloated bass. A bit of treble peakage there at 9k Some shrillness at 4k HiFiMan HE400i Frequency Response HiFiMan HE400i CSD HiFiMan HE400i Distortion Overall a fine effort following in the footsteps and in the spirit of the original HE-400. The midrange distortion (audible) of the original HE-400 has been corrected. The treble bump of the original HE-400 is moved down a few thousand Hz from the mid/high treble to the mid treble. The LCD-2 has more bass power and continues / flattens after the treble roll-off, whereas the HE-400i comes back with a mid-treble emphasis. The new HFMs (400i and 560) are a little bit softer with bass impact, but overall less muddy compared to the HE-500 and maybe less veiled / thick as the LCD-2. If you can get past the LCD-2's dark tilt, the LCD-2 is really in another class of headphone compared to the HE-400i. As it should for the price differential. This is LCD 2.2 non-fazored. Yes. HE-500 are more neutral. Thicker sounding. Broader, but much lower magnitude treble bump at same spot. Very smooth with jerg pads. HE-500 can actually sound dark on certain amps. Would be super cool if we could get the new headband assemblies on the HE-500. Still a favorite of mine from power amp. Slight 3-4k emphasis will result in shrill vocals. The treble peak at 8-9k could result in sibilance with the ess's? Rather than a broad bump, it's a fairly sharp peak. Because of this, certain tracks which happen to contain a lot of energy in that specific area will hit it - "spot lite" treble is a good way to think of it. Maybe Focus-A pads would be the solution? PREDICTION: This will be a funky one which there will be varying opinions - largely dictated by recordings used. @Headfonia_L Review (it's a good one): http://www.headfonia.com/hifiman-400i-mid-fi-best/ ______________________________________________ If you've enjoyed this post, help me help you, I have a growing family and need a Porsche Macan. Consider buying the better sounding HE400S from Amazon. Also, don't forget the Focus A Pads to go with the HE400S.