They seemed empty. There wasn't a whole lot of body. I didn't feel engaged. Really I just wanted something more laid back and flatter than my T90, but the performance difference was far too wide to be ignored. Not that I thought they could approach the T90 anyway, but I was expecting more at the price point.
That sounds like an amp synergy issue more than the headphone not being good enough quality because I have experienced what you are talking about before on the K612, they are very picky headphones and it can take some work to get them to sound right. Because with the right synergy the K612s are very dynamic and have plenty of body. They need an amp with the right synergy to sound right, specifically something with powerful dynamics, otherwise they sound undynamic and lacking body. The HD 600 on the other hand isn't near as picky but they do scale up well. What were you amping them with?
Edited by kman1211 - 7/4/14 at 7:09pm