Fosi Audio SK02 

Its the SK01 pure amp with tone control.

In the SK01 amp.

Thanks for the reply!

@@kitchau6682 glad i can help, enjoy!

I am not sure i have not tried the za3 amps.

The first one, the SK02, is acting solely as a DAC. The second one, the older SK01, provides the actual amplification and EQ/tone control. He could even connect a more powerful amp to the end of the chain and use the SK01 as a pre-amp solely for tone control.

​@@WeAreN1njaSince the sk02 is an amp as well, by having both connected to each other, does the sk01 benefit from the power of the sk02, making it more powerful?

@@S1RBR4N Yes, it is. The SK02 is actually acting as a DAC and a pre-amp. EDIT: Actually, on pass-through, I think it's acting solely as a DAC.

​@@WeAreN1njanice, can I use that combo connected into my phone or it need to be connected to a PC for example?

@@S1RBR4N You should be able to. The SK02 uses USB for data and power, and the SK01 runs off it's own battery, so you should be good. If I can find a usb-c to usb-c cable in my cable drawer, I can try it and report back. I won't be able to check until tomorrow, though...