I spent some time auditioning the Audio-GD Singularity 19 recently ... the fully-loaded version (neutral tuning - the "warm" version was not shipping when this was purchased).
It is, without doubt, the
absolute worst DAC I've ever heard (and I've done serious auditions on a LOT of DACs).
Words literally fail me as to just how bad this thing really is.
There was a claimed 100 hours of
factory burn-in and test on this unit. It had a subsequent 300+ hours of burn-in before I did any serious listening to it. And it had almost four full days of continuous power-on time (playing music) in order for it to warm up before I did my audition (which was done in my own rig).
It didn't matter what jumper settings were used. It didn't matter what input it was driven via. It didn't matter what source material it was fed. And it didn't matter what I used as a source.
It sounded consistently terrible.
It was auditioned with both Woo WA5-LE Mk2 (fully upgraded) and iFi Pro iCAN amplifiers, using Abyss, Utopia, LCD-4 and HD800S headphones.
This is not the kind of thing I had come to expect from Audio-GD, and if this is what one can expect from the Singularity-based models then I'd be damn sure to get an audition before you hand over your cash. It would be flat-out embarrassing at $100 never mind nearly $800 after shipping.
Terrible.