16-May-2020, 10:34
(16-May-2020, 09:06)Rufus McDufus Wrote: Slightly confusingly though the plot done by Amir after the unit was repaired (https://www.audiosciencereview.com/forum...ost-399323) looks to be on the optical input as opposed to the USB input show (left graph on @Confused 's post above. Ideally though, there shouldn't be a lot of difference between the two inputs. I guess that does show the optical input isn't too shabby though.
Good spot Rufus! Checking back at ASR, I see that you are absolutely right. So, this gives us a comparison of two different inputs, with a degree of doubt as to if the amp tested via USB was working correctly. Difficult to reach a definitive conclusion from that! Interesting though, maybe the optical input does actually have lower noise versus the USB input? No reason why not.
Maybe Amir is confused? Now there is a disturbing thought.
1000 Pro - KEF Blade - iFi Zen Stream - Mutec REF10 - MC3+USB - Pro-Ject Signature 12