The Sennheiser CX 300 headphones aren't your typical earbuds. These are designed to fit gently but snugly inside the opening to the ear canal, which accomplishes two things. First, while it doesn't cancel out ambient sound, it does significantly reduce outside noise. This is a great benefit when listening to music on a plane or bus, but take caution during other activities, as your ability to hear what is going on around you will be impaired. Second, the placement in the ear produces a greater bass response than you could normally achieve from drivers this tiny. The CX 300 package includes different-size adapters, so you can pick the size that fits best in your ear.

The 3-1/2-foot cord is asymmetrical, which makes it easy to wear when connected to a device in your pocket. The CX 300 headphones come with a 3.5mm connection jack, so they'll work with just about any portable audio device. In addition, the excellent bass performance will bring a portable gaming system to life. The frequency response is 18Hz to 21,000Hz, with an impedance of 16 ohms.

The CX 300 headphones are several levels above the average models that come with most portable devices, and they perform better than many aftermarket replacement earbuds. They are available in black (CX 300-B) and silver (CX 300-S). Sennheiser is one of the leading names in headphone production, and one listen to the CX 300 earbud headphones will tell you why.

Pros:  Good sound quality, reduces outside noise
Cons:  Somewhat pricey for earbuds

Warranty
2 years