Mini TDA1305 USB DAC Digital to Analog Converter Portable Headphone Amplifier | eBay
FIRE PHOENIX DAC-02
Amazon.com: Nobsound Q4 Mini 192K/24Bit USB DAC, S/PDIF Digital to Analog Converter, Bluetooth Wireless Receiver, Headphone Amplifier, with USB/Optical/Coaxial Inputs, with Remote Control : Electronics
FX-AUDIO DAC-SQ3 MINI USB DAC ES9038Q2M XMOS XU208 LM49720A PCM 32Bit