Not so sure that is true. The improvement I am getting from my AV 10 is stunning. I like everyone else thought speakers were the weakest link and that improvement in electronics would not be noticeable. Well my speakers were not the weakest link by a long shot. Those AV 7705 and 7706 AVPS were and by miles.
Those previous AVPs did not get the best from my speaker system. Not close. Yes the sound was very good, but now it is absolutely phenomenal. I am going to start another thread after listening to the 76 plus concerts from the 2025 BBC Proms, and last night was yesterday. An absolutely amazing experience.
My Anthem MRX 520 AVR's HDMI PCB bit the dust a few weeks ago. I was more than disappointed to find that boards are not available for a model which came out in 2016 (the year I bought it). I paid $1400 in 2016 for the AVR. The new MRX 540 goes for $1900. Being retired and on a fixed income, there's no way I would invest that much for a product which turned out to have a very short life span. Granted the analogue inputs and amps still work in the 520, but I have no need of an additional amp in my 5.1 set up.
I replaced the MRX 520 with a Sony STR AN1000, which I purchased direct from Sony during a sale and saved $225. It is set up, calibrated (using their supplied microphone and procedure), and I've come up to speed in its use (primarily the use of DSP options and "Set Up" choices which effect the sound signature). This was a simple swap out of AVR's, nothing else.
I listened to my Anthem set for the last 8 years. This is what I can say at this point in time:
The Sony AVR kicks butt when watching a movie. The AVR has two choices for calibration type: 'flat' and 'engineer' (Sony sound studio EQ'd). If the movie is watched with the calibration set to 'engineer', Sound Field set to 'Audio Enhancer', and the Sony 360 Spatial Sound technology turned "On", the experience watching a movie is fabulous. Hands down, watching movies with these settings is better with the Sony than the movie was with my Anthem. I'm sure Sony put a lot into their DSP engine which results in this improvement in audio when watching movies.
Listening to music is also excellent. Setting the calibration type to "flat", the Sound Field to "2-channel", and Music Direct turned "On" produces the best musical presentation, almost exactly like my Anthem. But just like
@TLS Guy pointed out, I am also experiencing changes to the music in my listening room. My speakers are Paradigm Prestige. The Sony has 'cooled' the treble slightly, which is a good thing. The mid-range sounds identical to the Anthem. Mid-bass has much more weight, as does the Low-bass. After listening to songs like Ute Lemper's "You look just like a girl again", Telarc's first "Spies" CD, and Lee Ritenour's "Fourplay" CD (all with deep, strong bass lines), I decreased the gain on my sub-woofer by a few decibels. The bass sounds great. I also hear differences in the sound stage of the Sony vs the Anthem.
To assume that a change in electronics should not produce any listenable sound difference in playback is, well, just an assumption. Before I bought my second stereo system in 1987 (NAD integrated amp, Audio Alchemy transport, Audio Alchemy DAC, Phase Technology PC 50/60 satellites and sub), I visited an audio store where I learned a lot. CD's were new. The owner connected source, amp, and speakers. I listened for 15 minutes. He then changed the source. I could hear a difference. I listened for another 15 minutes. He then changed the amp. Again, a difference, but this was even more pronounced. This experience left me "open" to the idea that anything can effect everything, even when you make just a single change.
As a side note, getting the Sony AVR for almost one third of the price of a new MRX 540 was great. I'm sure the new Anthem product is awesome, but it is not worth the price difference. I will be very happy with the Sony.
PS: My analogue Sony 5.1 system in my basement (used to entertain me when I work out), still works great. It has been operational for nearly 25 years. The Trinitron in the system must be 30 years old by now, and still looks OK.