Amazon.com: Syba USB 2.0 24 bit 96KHz DAC and Headphone Amplifier with 3 Present EQ Bass Boost 3.5mm and S/PDIF Windows/MacOS/Linux/Android PS3 PS4 : Electronics
Practical Devices XM6 Portable Headphone Amplifier and USB DAC - Head-Fi TV, Episode 002 - YouTube
Amazon.com: Syba Sonic 24bit 96KHz USB DAC Stereo Headphone Amplifier 2 Stage EQ Digital/Coaxial Output and RCA Output SD-DAC63116 : Electronics
EQ901 USB Replacement Equalizer for BOSE 901 Series Speakers Upgrade Pre-amp DAC | eBay
RME ADI-2 DAC FS Review: The Best Audio Product Ever Made? – TechReflex.net
RME ADI-2 DAC FS Review | Bloom Audio
Fosi Audio K5 PRO DAC/AMP/EQ - More Versatile Than A MultiCooker — Audiophile Heaven
McIntosh C53 Preamplifier with Next-Gen DA2 DAC - Audio Bacon
Amazon.com: Syba USB 24 Bit 96 KHz DAC Digital to Analog Headphone Amplifier 2 Stage EQ Digital / Coaxial Output and RCA Output SD-DAC63057 : Electronics
MiniDSP tiny portable USB DAC with 10 band Parametric EQ : r/headphones
Creative Introduces High Performance Sound Blaster X5 USB DAC and Amplifier | audioXpress