The Sennheiser PX 100 headphones have great sound even though the earpads are "open". I prefer open pads because the closed tend to hold perspiration in. These were purchased to be used primarily during workouts at the gym and I only have one complaint about them. During periods of high impact cardio, the movement makes the sound crackle. I am guessing it has to do with the wire and how it attaches to my MP3. My previous headphones and others that I sometimes use do not do this so I am sure it's not the MP3.Otherwise, the sound is great and the fit is perfect. I will continue to use them and just deal with the occasional crackle sounds.