Oooh. Lessee...
I've used NAC42, worked well
I've used NAC102, worked well
Used a CA2 Worked Well
SCA2 Worked well, sounded like the CA2 with a bit more at each end of the audio spectrum... same fronty back lefty righty timey wimey stuff
No Pre but a DAC via AppleTV and a volume port worked well
No Pre but a DAC and using the digital volume in the DAC via AppleTV worked well
Audio Note M2 Pre -- not so well
How's the cable? Ok? Not having a NAC to hand I was biting my toenails with anxiety I got it right... They needed trimming anyway...