Very true what you are saying about the noise part. I always wonder why my AVR-X4400H is so much quieter than the Marantz AV8801 it replaced. Amir's measurements explained it. Not that I was hearing the hiss and hum when watching a movie or even music when I was using the Marantz, but knowing the noise was audible during a quiet passage with volume approaching 0, or even -10 would bother me.
With the ASR measurements now, I have the option to steer clear of audible distortions and/or noise if and when I am shopping for AVR or AVP again.
Again, not sure I get your post. With volume WAY up to "0db", or even -10db quiet passages are ALWAYS dominated by the noise of the recording itself.
When I pause ANY recording on very quiet passages, the noise TOTALLY vanishes. Meaning it was Baked into the recording, not the AVR......
How can you differentiate the recordings "Noise" versus what is produced by the AVR??