@lanx0003 Thank you for clarification.
My Ultra is connected to a built-in DA2 DAC via USB out. I expected to hear some difference between that method - or using the Wiim's internal DAC connected via an RCA cable to the same amp. But it sounds all the same to me.
However, my chat gpt is also saying that my streamer / dac combo is the weakest link, so I'm researching what I'm doing wrong.

