First impressions of the B&O H6: Much better than average soundstage for a closed headphone, very detailed bass that's neither emphasized nor recessed, and mids that have a slight emphasis around ~1 khz to ~2 khz that give the overall signature a lighter sound than most of the headphones I've been listening to for the past few months. Exactly how this signature would compare to the kings of 'Neutral', i.e. the Sennheiser HD600 and HD800, I don't know because I don't have either one handy now, but I'd guess it's very close. For example the somewhat warm ATH ESW9a with the wood cups sounds nearly identical to the H6 when the ESW9a's treble is boosted slightly. The H6 does not have a bright treble by any means - the treble has about the same strength as a classic neutral headphone (see above), and low quality music tracks with excessive sibilants or other such distortions may be irritating with the H6 if played at loud volumes.