SMSL SD-793II DAC and Headphone Amplifier 24BIT/96KHZ No Power Cord Tested Work

Vintage Superex Mode Headphone Amplifier

iFi Nano ICAN Portable Headphone Amplifier Rechargeable

Used Audioengine D1 24-Bit Desktop Headphone Amplifier & DAC

Cambridge Audio DacMagic 100 Digital to Analog Converter DAC Black

Audioengine D1 USB DAC Headphone Amplifier External Box Optical Input

FiiO E12 Mont Blanc Portable Headphone Amplifier - Tested Working

FiiO KA3 Mini Headphone & USB/DAC Amps w/3.5&4.4mm outputs, DSD512