Shanling Audio UA2 Portable USB DAC AMP Review: This $85 Dac Amp Combo Has Jaw-Dropping Power and Sound! - HIFI Trends
iFi audio hip-dac2 Portable USB DAC and Headphone 0312005 B&H
Amazon.com: Helm Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio, THX Certified : Electronics
NEW* NanoSound USB DAC (ESS ES9028Q2M 117db SNR DAC with headphone amp)
Creative Sound Blaster X3 Hi-Res External USB DAC and Amp Sound Card with Super X-Fi for PC and Mac - Newegg.com
Creative Sound Blaster G3 USB-C External Gaming USB DAC and Amp for PS4, Nintendo Switch, Ft. GameVoice Mix (Audio Balance for Game/Chat), Mic/Vol Control and Mobile App Control, Plug-and-Play - Newegg.com
Amazon.com: Fosi Audio DS1 DSD512 HiFi USB C DAC ES9038Q2M Mini Audio Headphone Amp Adapter Supports 32bit/768kHz with 3.5MM and 4.4MM Dual Headphones Outputs Compatible with Smartphones/Laptop/PC/Music Players : Electronics
AudioQuest DragonFly® Black v1.5 Plug-in USB DAC/headphone amplifier, compatible with Apple® and Android™ mobile devices at Crutchfield