I've been using the Hidizs Sonata HD for a while now. Not enough data here (esp. on the amplification) to tell if this would sound any better. I'll stick with what I have (which is plenty good incl. driving higher impedance headphones).
tomtom70Same with me: I doubt that this new UBC-DAC-Adapter is much differrent or even better than the Sonata that many use and like. Especially as there are no claims in any direction so far.
tomtom70I also have the Hidizs Sonata HD, it's one of the best sounding dongle I tried. It even rival some of the $150 ~ desktop DAC/amps that I used to own, however my headphone is Denon AH-D2000 so it's very easy to drive so your mileage may vary say if you try HD650 or something.
But if the Alpha & Delta dongle sound anything close to it then I'd say it would be a good alternative to the Hidizs Sonata HD and I'd confidently recommend it.
HydeYes, indeed. And yes, I ordered one USB-C and one Lightning. They were pretty, and cheap, but eh? Win some lose some. My 789 has been dispatched :)