I love music, so much that i always bring with me my trusty mp3, and a pair of earphones in my poket, and because of this i have destroyed countless pairs of earphones.
I have tried tons of different types and brands (sony, bose, sennheiser...), and till now, these are the best one i have found, especially because of they're price to quality ratio.
I have brought them everywhere, even under the rain, but a year later, they still work perfectly, and the sound is still like the first day.
The quality of the sound is also great, is not at a professional level, but for the price, you probably won't find anything better.
They're not perfect, the shape of the earphones can be sometimes a problem, especially if you use them to listen to some music before falling asleep, but it's hardly a big issue, especially considering the quality and the price.
Realistic music reproduction demands clean, undistorted bass response, and the K 311 headphones perform brilliantly, at any listening level. A virtually weightless semi-open design, K 311 extends the AKG professional tradition to ear buds you can take with you anywhere.