FiiO K13 R2R Desktop DAC & Headphone Amp, 24Bit DAC, Bluetooth Streaming (Black)

FiiO K13 R2R Desktop DAC & Headphone Amp, 24Bit DAC, Bluetooth Streaming(Silver)

FiiO K11 R2R Black Desktop DAC and Headphone Amplifier

Chord Mojo 2 DAC

HIFIMAN EF499 Headphone Amplifier (AMP) and R2R DAC

HIFIMAN EF499 DAC/Amplifier with Support for Streaming Media and R2R DAC

Fosi Audio Dac-Q4 Headphone Amplifier