I really liked the DJ100's when I had them, but they aren't my first choice for vocals.
The midrange was definitely there and upfront, but the whole sound signature seemed a little laid back and under a slight veil. I will admit, when I first listened to them, I wasn't too impressed. But after getting tired of the K601 and Q701's treble, I went back and tried again. This time, I gave them a chance. Wow, it seems like my patience paid off! These are really quite fun headphones! I wouldn't call them monitors by any means, or an audiophile's dream, but they offer something much more unique than that. Probably the biggest reason I like them so much.
Bass is plentiful and really shows itself when needs be, yet doesn't overpower otherwise. Most likely due to it's closed nature, there is slight reverb that most likely contributes to the slight veil I mentioned. It really just adds a level of darkness and unique flavor. Midrange is very close and upfront, I will admit, but doesn't shine through as good as naturally brighter headphones do. Still, vocals are quite good for headphone of this price. And of course the treble, which is definitely there, yet the whole signature is still dark. Nothing is fatiguing, well, except possibly the comfort with stock pads.
You know, I wouldn't buy these as my only headphone. Yet, my collection seems incomplete without them. At their price point, they are fantastic. It almost feels like I'm being a bit harsh to them, as I always seem to get in the mode of comparing to much higher models. But, even then these held their own. Besting the D2000 sonically and the Q701 for preference, I'd say these are worth much more than they are.
Seeing this possible new and tweaked model has me intrigued. Color me interested.