I'm not getting enough bass from my Shure earphones. Why?
The reason for poor bass response is a poor fit between the earphone sleeve and the ear canal. If the sleeve does not completely seal the ear canal, there is little bass. This is usually caused by using a sleeve that is too small for the ear canal. For the best bass, use the foam sleeves. After you compress them, they mold to the ear canal as they expand. This creates the best seal, and therefore the best bass.