DAC with sparkos ss2590
This dac for the price is wonderful, I bought it and directly installed the operational sparkos SS2590 Pro. The sound is simply perfect, I couldn't imagine it better. Airy, clear, musical, with an impressive dynamics. I recommend 100% the update with SS2590 Pro. Warning, you need to buy a small elevalor for the chip, otherwise it touches the case, and then put some higher feet.

Standart package *** stars worth
I wrote a review for ASR. In short, you should know:
Only one extra Op-Ams comes with the set.
All the extra Op-Amps offered by Aune are no better than a cheap DAC on the market. The sound starts to normalize around OPA627, which can be purchased separately, and because of which you will not be able to close the lid of the device. The optical port does not click into place. The potentiometer has difficulty separating the channels. A POP sound will be heard when laying in/out. Only with Sparkos SS3602 will you have a real benefit. You can initially buy the cheap BB OPA627 and upgrade over time, or upgrade immediately if funds allow and the system is ready for it.

A hi fi device by all means
I have it only a week now but from the first moment it gave me the confidence and pleasure that only real hi fi devices do.Always on it runs cool, every input/ output works perfectly, usb driver a breeze, sound really better than my Burson conductor 3 reff wich cost me more than 4 times more and now returned to its box as a veteran (a war casualty.)