Archimago's Musings: REVIEW: iFi GO Bar - Portable DAC / Headphone Amp (Cirrus Logic DAC, Balanced & Unbalanced).
Luxury & Precision W2 Review - Best Portable USB DAC AMP for Smartphones? - ThePCEnthusiast
HELM 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 : Amazon.ca: Electronics
CEntrance Debuts BlueDAC Portable Balanced DAC/Amp with Wired and Wireless Connectivity | audioXpress
Fiio Q11 Review - Headfonia Reviews
10 Best Portable DAC/Amps - Great for iPhone and Android [2023] - Headphonesty