I have focused on the following things - so please add if it fits the topic.
The very nice and therefore also very successful RME ADI-2 DAC (FS) was tested here
with DAC AK4490
https://www.audiosciencereview.com/forum/index.php?threads/measurements-of-rme-adi-2-dac-and-headphone-amp.7546/...
