Excerpt: One of the most commonly voiced complaints about earbuds is that they don’t deliver enough bottom end; those tiny drivers just don’t have much material to work with when it comes to producing long waves. M-Audio’s IE-20 XBs are the exception to the rule. These earphones pump more bass than many full-size headphones.
Pros: Comfortable, fits a variety of ear sizes, a "bass monster."
Cons: Tend to focus on the lows a wee bit, which might affect the composition of your mixes if you decide to use other speakers.