Topping DX7s has worked for only 2 days!!! My computer no longer recognizes the device, no Topping USB Audio shown in Windows Device Manager anymore. Moving to another Windows computer, same thing. The device itself can turn on/off, the menu control seems functioning that you can make selections, etc.
I have 3 other Topping devices (D30, D50 and DX3 Pro), none of them has this problem.
Anyone has seen this before?
While it was working, the sound quality is good enough for my ears, comparing to Teac UD-301 and JDS ATOM, and pairing with HD800s, LCD-X and Stax SRS3100. I have no complaints to its sound quality and that is the reason I cancelled my order of AAA789.
Update: After googling around, found that some other people also saw the same problem. The problem is that the device's USB port software hangs up. To solve the issue, power off the device and the computer, disconnect power cable and usb cable, then power back on the computer and the device. The computer should be able see the device again.