OCModShop posted a review on the Sennheiser CX-300 In-Ear Headphones

There is another thing that I value above the music and that sound quality. I hate having to listen to music without some depth; some nice clarity to be able to hear every stroke and glide cross the strings of a guitar, and the pounding bass drum of a rock song. Of course I take my music with me wherever I go on my mp3 player, but I want something better than the average headphones you get with a media player.

Now the CX300 is the first and currently only in-ear (or ear canal) headphones Sennheiser makes. Let's find out of their in-ear products are up to spec.

Sennheiser CX-300 In-Ear Headphones Review