LH Labs Geek Out 450 USB DAC / Headphone Amplifier - Black – Excellent Condition

TOPPING DX1 Audio DAC AMP TP207 Black USB Headphone Jack Gain Control 2-Channel

FiiO E7 USB DAC Headphone Amp (untested)

Audioengine D3 Premium 24-Bit DAC and Headphone Amp

Fosi Audio ZH3 DAC Headphone Amp, Fully Balanced Preamp 4-in-4-out with Remote

Nobsound Q4 Stereo USB DAC Gaming Headphone Amp DAC Bluetooth Receiver 192K

CALYX PaT – USB DAC and Headphone Amp - Used but good condition

Lavaudio DS600 HiFi Bluetooth DAC Headphone Amp Desktop Audio Decoder