I believe @amirm noted the following:One thing to know is JBL refuted Amir’s measurements, and released a doc going over their own measurements which were much better. Someone sent me it, but I’ve lost the link . So keep that in mind. I bought the SSP-55 anyways and love it.
”And this is the problem with this design. One has to design knowing that HDMI connection and bring with it, its own source of noise. My computer USB port is also very noisy but we don't see that impacting hardly any DAC I test. Here, I have had tons of other processors and AVRs on the same setup with no noise issue over HDMI. Yet all of these Arcam based products suffer from this problem. And the company on purpose avoids testing them this way by using a portable, floating HDMI source.”
If that is how their tests were conducted, it doesn’t seem like a real world test to me… HDMI shouldn’t have to be tested in this manner to get better results IMO (if I am understanding it correctly)