If you're looking to improve the audio coming from your iPod, iPhone, or Mac, a new set of headphones is probably the most rewarding upgrade you can make. Here's a rundown of the different types. Earbuds, the type of headphones included with every iPod and iPhone, sit loosely in your outer ears. They don't produce outstanding sound, but are compact and inexpensive. Canalphones fit snugly (and deep) in your ear canals. Like earplugs, they block most external noise, so they're great for travel and noisy environments. However, some people find them uncomfortable, and many have a high price tag.
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