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Firestone Fireye Mini Headphone Amp

Great headphones are, well, great. What's not so great is the inability of many portable devices to drive cans with impedance of 32 or higher. The Firestone Fireye Mini Headphone Amp ($40) fixes this problem, by sitting in between your device's headphone jack and the headphones themselves, providing a healthy signal boost without adding much in the way of noise. Just charge it up via USB and you'll be ready to rock out for up to 24 hours before your next charge.

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