The W4 is not dark at all in my opinion. If you're saying it sounds like an HD650 which is a dark headphone, I heavily disagree. Also, dark is similar to being laid back, veiled, muffled, muddy - which does not sound like the W4. And by the way, you do know that dark and neutral cannot exist together, yes? If a headphone is dark, then it is coloured because presentation is darker than the way it is originally intended. The same thing applies to bright headphones.
Edited by nikp - 4/30/12 at 4:00pm