Hello Peng, thanks for context, I wanted to say that I do not notice an auditory improvement that makes me decide between one thing and another ... by the way since you handle sinad and it is still not clear to me I was thinking of putting a two-channel stage to see if I took advantage of the good sinad of the dac but could you tell me if normally listening at a volume of -10db on the absolute scale that sinad would take out the 8500 with the internal amplifiers? We already know that the preamp is 103db
If you are asking about the SINAD measured at the 8500's power amp (that is speaker binding posts) output, according to Amir's measurements it should be in the mid 80s. If you use to pre out with one of those hypex amp such as the Purifi amp, then I think you can expect SINAD higher than 90 dB but I am guessing. We still are waiting for Amir to measure a Denon AVR paired with one of those hypex amps that has high SINAD.