I needed a good pair of headphones for the gymnasium that I go to. They have exercise equipment that allows you to watch and listen to television shows while you exercise. The first thing I liked about these headphones was the warranty by Koss. It's a lifetime warranty. That tells me that they are vested in their product. That deal always works for me! I also like how they feel on my head. They are very comfortable. The sound quality is extremely good. At first I thought they were a bit pricey at fifty dollars but when you take into consideration that they are warranted for life it's more than fair. My girlfriend asked to borrow them to use on her computer one day and commented how good they sounded and how they canceled out the noise outside of the headphones. They have titanium diaphragms and give crystal clear highs, very crisp midranges and great lows. The frequency response is 15-22, 000 hz. For more information please go to www.koss.com. A very nice product and money well spent.