Well, the issue of "how much SINAD do you really need?" is always a popular debate topic.I have to add, I just heard a few Yamaha Avr's, not this model, but ones from 6-7 years ago.
One was the Most entry level one, and the other was a top of the line aventage model.
What is disturbing me now, is the measurements he got seem quite mediocre, but hearing those receivers in person (mind you older versions) I was not able to correlate anything negative to the sound from simply listening to them.......???
Would these measurement issues only come out at truly high levels? Are they masked by normal program material, or simply not all that audible in reality?
I would not call the two models I heard at a friends, the ultimate in sound, but as a long time audiophile, I heard nothing truly negative also??
With a noise floor of 30-40dB even in a very quiet room, the "flaws" of a 75dB SINAD amp vs. a 95dB SINAD amp would generally be totally masked by that noise floor anyway.
On the other side of the argument,
1. SINAD is cumulative for the whole signal chain. So if your target is ___dB of SINAD then everything in the chain actually needs to be above that.
2. It's true that the noise floor in your room generally does not consist of high frequency sounds. So perhaps flaws there would not be as easily masked by the noise floor. But that would generally be outside the realm of fundamental voice/musical frequencies anyway, so IMO not terribly impactful.
Just trying to give both sides of the never-ending debate.