The D2000 is a beast. Before it was burned in, the bass seemed overpowering. My original impressions for the headphones were that they were only good for softer music such as ambient, classical or new age. However, as time passed, I think the treble and bass lessened to the point where they seem quite listenable for any other genre. However, I still think the bass might be a-bit too heavy for some bass heavy D&B, trance or industrial music. In this situation, I’d just reach for my HD650s to solve this problem. For rock, the D2000s impressed the hell out of me. However, with some bass-heavy metal, there might be a problem with too much bass. Another issue I have with the D2000s is that at times, they seem to be too bright. I only find this an issue with I already feel that the mp3/flac file is already too bright. Then I just reach for my HD650s.
The Denons seem to lack the resolution that the HD650s have. If I were to listen to a recording, the Denons seem to stay at the same “volume” throughout the whole recording. Yes, the Denons have an incredible amount of bass/emotional impact but that impact is always there at any time. This makes the “peak” of a song less enjoyable. The HD650s tend to have less of an impact but has more resolution. It is quieter or louder during a track. The “peak” or loud part of a song would be more enjoyable on the HD650s. I think this is why people say that the Denons are more forward sounding. I would have to definitely agree. As for the HD650s, I can only find them listenable without the foam pad because I need that extra sparkle. I like to say that they give off a “fat” sound that isn’t so good for rock even with the de-foam.
I would rate all these headphones as such:
D2000: 9/10
DE-FOAM’D OR EQ’D HD650: 8/10
K701: 6/10
STOCK HD650: 5/10
KSC75: 3/10
*UPDATE* *UPDATE* *UPDATE* *UPDATE* *UPDATE* *UPDATE* *UPDATE* *UPDATE* *UPDATE*
Realized that my x-fi was mudding up the signal due to it not being bit-matched. All the imperfections given to the D2000s are void. The bass is much tighter and the high-end doesn't bother me at all. My new rating is 10/10. They are absolutely perfect now imo.