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: Amazon.co.uk: Electronics & Photo
Audio-technica USB Headphone Amplifier Corresponding At-ha40usb 24bit/96khz [ Japan Imports ] by Audio-Techn… | Audio technica, Usb headphones, Headphone amplifiers
FiiO K3 Compact Headphone Amplifier and USB Type-C DAC K3T B&H