Not unlike many companies that come from Germany, Sennheiser has a reputation for being a world-class leader in its field. In this particular case, the brand creates excellent audio equipment and, in my opinion, is among a very elite few that produce consistent and reliable products that regularly outperform the rest of the field. These CX 300 internal ear monitors are part of the brand’s "streetwear" line, and they provide an affordable yet effective upgrade to the pair you got free with your iPod. The headphones sit in your ear-canal and are able to block out most ambient noises while delivering powerful bass-driven audio. The headphones also come with a set of three size adapters, so you are sure to find the perfect fit. via