These are the revised HE400 with white plastic inside. They are a great introduction to planar magnetic (orthodynamic) headphones. They are one of the best value headphones for what they offer especially considering their technology.
Frequency response has a slight v shape, has great bass and still offers plenty of detail. You can read plenty of reviews on this site here to confirm this.
I am the second owner of these very nice headphones, still in like new condition. No scratches or blemishes. Comes with original retail packing/box and with both velour and pleather pads.
Edited by musicman2006 - 4/7/14 at 10:53am