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Dan's Data take a look at the HeadRoom Total BitHead and Etymotic ER-4S earphones



HeadRoom's Total BitHead USB-and-analogue headphone amplifier, and Etymotic's ER-4S earphones, are neither cheap, nor entirely normal-looking. But if you're searching for a way to listen to _seriously_ good sound in inhospitable environments - like, while you're on a bus, or when you're in a noisy server room - these two could be just what the doctor ordered.
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