"What is expensive is better" this is what we say very often. Wrong! for this post. Clear sound, a smooth rendering and faithful, so some type of music you enjoy listening! Especially beneficial for people who, like me, have not adapted to the ear headphones that enter the ear. Very comfortable, ideal for sports or just about anything while listening to your music without ever having to readjust. The quality of your sound with these headphones will be stable for 1.5 / 2 years (and I listen to music at blind!). I swear by these Koss, and all the people I've offered are just as satisfied! A choice without hesitation!