For "Full fledge sound systems", use async USB when possible (DAC uses its internal clock): Superior to coax or optical which are dumb slave clock interfaces. Obviously, it would be feasible for a DAC to receive the data from coax or optical and still buffer the data + use local clock, i'm not...
I bought it and i'm very satisfied: Smooth and precise sound, good looking, XLR, etc. I know i could have bought a less expensive one (was considering SMSL D-6s too) but i love the display and i wanted to get 12V trigger. Considering the high audio quality, it's not very expensive anyway, even...
It would be good indeed, i'd like to do Room EQ directly in the DAC. This would probably translate into a higher price though, as XMOS XU platform doesn't do DSP IIRC.
Digital audio is a well mastered field in electrical engineering for quite a long time now. Not to downplay their merit, it's a matter of putting time / effort, doing the right things to offer attractive / competitive products for the market you're seeking. Electronic components are evolving...
We know it's not the best in audio quality but it's very handy when you have, for example, a friend who wants to play songs for you from his phone / PC / Tablet!
With good engineering, jitter account for very low inaudible distortion...
https://www.analog.com/en/technical-articles/analyzing-audio-dac-jitter-sensitivity.html
The Benchmark is surely a great amp but i don't think it brings much to the table compared to Hypex and Purifi. Passed a certain level of fidelity, your ears are not able to distinguish. Get better / more linear speakers and take care of your room, this is the place where the distortion is...
About Class D from Hypex and Purifi, it's not "good enough", it's better than the traditional class A/AB competition! Numbers speak by themselves. Bought a Hypex Nilai 500 Steron DIY + Hypex Preamp DIY, using my Topping D70 Pro (could have bought a less expensive one like an SMSL D6-s, but i...