THX's Onyx is a tiny USB-C headphone DAC that supports master-quality audio | Engadget
iFi Audio GO bar Portable USB DAC/headphone amplifier, compatible with Apple® and Android™ mobile devices at Crutchfield
TempoTec Sonata E44 Headphone Amplifier Dual CS43131 USB Type C To 4.4 — HiFiGo
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