I bought my DT-770s about three years ago used (I call it pre-broke in). They produce a great amount of bass and are perfectly sweetened.  The only reason these wouldnt sound good is if you were listening to low quality music, because they reproduce sound very well. Not only that but ive dropped these, thrown em across the room and the like, and theyve held through it all, VERY durable. Great beginner headphones, and the leather pads allow them to be worn for hours. There have been times when im not even listening to music and I put them on anyway :)