Past: flac > Adnaco > RME AIO AES> Audio-GD SA-2 > Flux Lab PA-250.1 > Quested H108
Past: flac > WASAPI > Foobar 2000 > USB > MHDT Havana DAC > Adam A7
Past: flac > WASAPI > Foobar 2000 > USB > MHDT Havana DAC > FluxLab > Ultrasone Pro 900
Past: Audiotrak Dr.Dac2(4*opa627), Audio-GD Compass, Sennheiser HD 650