Like several modern headphones I've had (Focal Elear, AudioQuest NightOwl and NightHawk, Sennheiser HD8-DJ), and unlike most hi-fi headphones I've had (AKG K712/812, Beyerdynamic Tesla, Grado, Sennheiser HD600 and 800 series, Shure SRH840/940/1440/1840), the Pioneer X10c is slightly recessed (~6 db) in the "presence" area around 3.5-7 khz. Those who turn up the volume to hear more detail - if that's what they do - will hear more bass, but also more of the upper treble. I've read complaints in several reviews about these things, and even a couple complaints about an excess of spaciousness, but what I've found is when the presence area is EQ'd up a little, the soundstage is simply amazing and the tonality and clarity are awesome. The only downside I've experienced so far is some sweating in warm environments, but that's an issue with other full-size closed-back headphones that use pleather earpads. I love this headphone for several reasons (it's gorgeous for one), but mostly because of the clarity and accuracy - like being at the session live in person.