These Sennheiser headphones are designed for listeners with smaller ears
Good Gear Guide.au
22 April 2010
Summary: Available for a reasonable price, the Sennheiser MX 581 earbuds offer a boost in sound quality over the earbuds bundled with most MP3 players. However, if you push these earphones too hard you will encounter bass and treble distortion.
Pros: Good sound quality at moderate volume levels, comfortable design that can be altered to suit small or large ears
Cons: Distortion of bass and harsh treble at high volume levels