Its also pretty long, which has come in handy when I forget Im plugged into something and try to get up and take things with me. The upper material isnt as nice, the sole isnt as wide, feels different, and they leave black scuffs on some of my floors. Maybe one company bought the other? Dont know. On the other hand, the HD 660S is the definition of clarity, the sound is clean, crisp and stays true to the original recordings across the board. They are easy to use and fit well on all the appropriate free weights I use at the gym. 5 and they feel more like size 8. If this is where the future is going with sound and light then sign me up! We had to continually try different solutions just to get the shelves on. Problem was on SW, it would STAY in this mode, and I would have to go into the menu and do a re-set of the radio. Also, they ARE NOT leather, as the description says.