The frequency response graph made me a bit concerned:
View attachment 14742
In Amir's test results, the dip in the low frequencies is present. What I didn't expect were the variations towards the higher frequencies. The results from my U2 DAC show that my sound card's line-in input is capable of recording a fairly flat frequency response. So what gives?
Now I know that using RMAA to evaluate the quality of a DAC has many shortcomings. I'm aware of NwAvGuy's article. However, I thought that using the same software, same audio cable, and same USB hub would allow for a fair comparison between two DACs, at least in the frequency domain.
Am I missing something here? Is there something wrong with my methodology, or even with my DAC?