I appreciated your help and took the receiver back out of the box specifically because of your advice and tried again doing everything you told me to (within my capability), when I posted the results you stated I had no problems and it was basically all my imagination but on the first one the change in output or sound was very profound when whatever happened happened (this was on both bluray and TV inputs). In my original post I carefully laid out the sequence of events. Your saying receivers don't have a sound and its all source dependant but I don't personally believe this, I liked the sound of the pioneer right out of the box (before any room correction), liked it more than my Anthem, a lot more (though you accuse me of being biassed against the Pioneer?). I'm biased against the Denon because I had in the past never liked the Denon sound previously owning them though this may be a thing of the past (my last Denon was in 2005). My wife prefers the sound of the Anthem over the Pioneer

. Your saying I should "buy the Denon and I will IMAGINE it will sound better" and "I just want to get rid of the Pioneer" which I could have easily done without all the writing posts and reading (not only here but on Redit posts describing exact same issue) and testing. Obviously I was trying very hard to keep the Pioneer. After saying all this is my imagination or some inherent bias your accusing me of filtering the important stuff and feeling attacked. I never "made up my mind" if I had I wouldn't have gone through all the testing. I personally don't care which name is on the machine generally though I'm a bit biassed against Denon from past experiences with sound.
All of this creates a dilemma for me especially since I don't know what the root cause of the problem is and I can only ASSUME that EWL5 is correct about my speakers being the root cause of the problem (though it was great for like 3 days), maybe 9 Mirage omni speakers is uniquely an issue (it is worth noting that although he is clearly biased towards Denon I was able to find the data confirming exactly what he said about my speakers being an issue which is an important piece of information for me going forward). I can stick with the same brand and go to a VSX-LX805 or TX-RZ70 or Integra equivalent and see how that goes but were into some serious money, maybe their predecessors (assuming my speakers are the problem a heavier amp section should eliminate this). I can try the Denon or Marantz product line, could be great though no deals on new but a few good deals used. I can follow my heart and look at some of the used flagships i'm very attracted to

( I have a NAD T778 and Arcam AVR11 saved in marketplace that are really great deals but from what I read I had better keep the Anthem close by for the inevitable failures). Nad and Anthem have an advantage that they are both headquartered within 2 hours of me.
Your Anthem has MUCH less power than the Pioneer. (it's rated at 100W per channel at 8 ohms, feeding 2 speakers!)
Even when feeding 7 passive speakers, the Pioneer can put out nearly 90 Watts per channel. That is thanks to the immense power supply the company put in there.
(Most AV-Receivers come with 300-400 Watt power supplies. the Denon, iirc, has 600 Watts.. and the Pioneer has a 750 or 800W power supply. )
iirc, Your speakers dip to 4 Ohms, which is not a problem at all. (As I said before, mine go to 3 Ohms, and we've had people with even harder-to-drive speakers use the same receiver)
your insistence in "Amplifier sound" is what's triggering me, by the way. You don't have to "believe" me. I'm not the one who ran hundreds of research experiments proving that there is no such thing as "amplifier sound".
In order to properly compare the sound of systems, you need to very thoroughly match output volume. (because even 0.5-1dB in difference causes a VAST difference in perceived sound quality.. louder ALWAYS sounds better and fuller!)
You should also eliminate any expectation bias, by eliminating any visual component. (i.e. you'd need to conduct a blind test!)
Without doing so, your claim as to "this sounds better than that" simply holds no weight in this forum called audioSCIENCEreview.
And while my suggestion to spend thousands on a Denon to imagine it sounding better may come across as rage bait or an insult or whatever.
It's deeply rooted in psychology.
It's called expectation bias, and it works wonders for humans across the globe.
From esoteric rituals, over homeopathic remedies, over spiritual healers, all the way to luxury goods. People expect more from something that has more value, even if said value is not real.
By spending 4000 dollars, you would be an utter fool NOT to expect a better quality.. Why on earth would you spend this much money on something if not to get much better, right?! And that expectation directly flows into your perception.
I'm not sure how your technical expertise is, because I didn't get the impression that you really know what you're doing while "testing" the receiver. Maybe it's just me struggling to follow your description of your actions, though.
You never engaged with the various recommendations and explanations I provided.
Did you ever check what exactly it is that the receiver is putting out?
Is it Stereo, surround, or actual bitstream from the blu-ray?
Your last test indicated that the volume was fine, since -37dB produced a comfortable level (-37dB is absolutely too quiet for me to enjoy music or a movie.. I need TWICE as loud, at -27dB roughly) for internal processing (internet radio, no?)
That leads me to believe that there is an issue with the output level from the tv, or the blu-ray player (did you test that?)
anyways, this sounds like the hdmi input is not receiving the correct input level of audio.
And it's very well possible that the update of the receiver changed something in the hdmi settings.