Nice Cans' demo pair of the Audeze LCD-3 arrived today -- I can't wait to spend some time with it. Audeze always provides a plot of each unit's frequency response. (Click on the link for a larger version.) This is an extraordinarily flat response for a sound transducer. Regarding the dip in the upper frequencies, recall that the ear's natural sensitivity is higher in that range, so a truly "flat" headphone sounds too bright.

Tags: LCD-3, planar-magnetic, response graph, frequency response