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Housed in a billet-like slab of aluminum, the HRT microStreamer’s clean, utilitarian design tips you off right away that it means business. In this case, that biz is performing the same basic tasks as the Dragonfly, including decoding files with up to 96 kHz/24-bit resolution. And at a mere 2.5 inches, it checks in for work in a similarly compact form factor.

As an Android fan, it's been frustrating to me to see how many audio accessories have been made for the iPhone, but almost none for my phone of choice. As a Samsung Galaxy S III owner, it's been even more frustrating, because the GS3 has sold more than 40 million units to date, with the GS4 coming in a couple of weeks to keep the trend going. Finally, though, someone's come up with an audio accessory for the GS3. Not some tacky little plastic dock, either. It's actually the coolest portable headphone amp I've ever seen: the V-Moda Vamp Verza.

When Audioquest released its DragonFly USB Digital-Audio Converter back in 2012, the tiny USB-stick DAC quickly found a niche with audiophiles seeking to improve the sound quality of music played on their laptop computers and listened to via headphones or desktop speakers.