These are the best headphones you can buy for 200 bucks. Honestly, you will not find better at this price point. I have heard several pairs of headphones at the 200 dollar price level. These include Beyerdynamic, Shure, Audio Technica, and Sennheiser. The K612 Pro definitely beats them all. They have a very neutral, and musical sound signature to them. These headphones are certainly not for bassheads. However, they are not lacking in bass either. They sound awesome for music, and also for gaming. The imaging, detail retrieval, and soundstaging allow you to detect exactly were the sounds are coming from during gaming sessions. These headphones have a tight and controlled bass, with a slight roll off in the sub bass region. Should you desire a little more low end, you can easily add 1 or 1.5db across the 30-60hz region with an EQ. The mids are smooth, musical, and slightly warm sounding. The treble on these headphones is not bright at all. It offers nice detail, while not introducing additional unwanted brightness or sibilance. Be aware that these headphones require a decent headphone amp and dac. If you are planning on running these off of garbage onboard audio, you are dreaming. If that is your plan, they won't sound right, and they won't offer a decent amount of volume. Get yourself a decent amp/dac combo for a couple hundred bucks, and you will be good to go. These headphones require a little burn in time, but not much. The pads soften up after about 10 days of use. The bass and treble will also smooth out after around 8-12 hours of usage. At around 12 hours or so, you will have a nicely balanced sound signature.
Fit perfectly on EVERY size head due to the design and don't move at all when shaking head aggressively. Closed back however you can hear sound in the environment. I can believe the claim that they reach almost 40K (I wouldn't know as I can only hear up to probably 19KHz so it's kinda wasted on me). In summary really comfortable and gentle yet still the most accurate headphone I've used to date.