When you're using in-ear phones, the seal is everything, and Koss is attempting to capitalize on that phenomenon with The Plug, earbuds with shape-shifting hydrophillic urethane tips that conform to the shape of your ear canal. At just $14.95, it seems impossible that these earphones will sound very good, but the idea of a form-fitting seal is certainly on the right track.

We've tried other earphones with similar characteristics, and if you get that seal just right, the result is skull-pounding bass and crystal-clear highs. Koss claims frequency response of 10 to 20,000 Hz with these babies. Yeah, right. We'll believe it when we hear it.

Product page [via Shiny Shiny]

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