I can only agree with that ! I have had several Topping DAC, the only one so far that pleases me was the D70 with the AKM4470. I have now this DX9 and i am very satisfied with the sound ( at least a decent sounstage !).
So the only Toppings that I 've found good was the ones with AKM chips. I know there are some people on this Forum asserting that all DACs have the same sound, but I coukld not disagree more with this statement