iFi ZEN DAC V2 Desktop USB DAC and headphone amplifier at Crutchfield
Amazon.com: LiNKFOR USB to SPDIF Coaxial RCA and 3.5mm Headphone Jack Converter USB DAC Optical Audio Adapter USB DAC PCM for Windows Mac PS4 PS3 : Electronics
Sound Blaster G3 Portable Plug-and-Play USB-C DAC Amp for PlayStation® 4, Nintendo Switch™ Gaming Consoles, PC, and Mac - Creative Labs (United States)