Quick review of my 4800:
I have a 4800 because my 4700 died after only 2.9 years. First, it started going into Audyssey calibration mode randomly. Then, it went into protection mode, which persisted after a factory reset with nothing plugged in. Denon support said it needed to be repaired and indicated it would take "quite a while" to get it back, so I purchased a 4800 on sale for ~$1700 to have something to use.
The Cons:
1. I really miss the front HDMI port, as I used it for calibration. I bought a 2' pigtail to reach the back and find it annoying
2. The Audyssey mic arrived broken and was replaced by Denon support with a round(?) one in a few weeks time
3. Sending an Audyssey profile from the MultiEQ app overwrites the Dirac slots on that preset
4. Sending a Dirac profile to a Dirac slot overwrites the Audyssey profile on that preset
The Pros:
1. It sounds exactly the same as my 4700 did, save for differences in the the DRC calibration, which means it sounds great
2. It has fewer nonsense inputs on the back
3. Speaker layout configuration is much simpler--especially for disconnecting internal amps
4. It supports Dirac, including DLBC!
With some effort using MultiEQ app and editing the JSON files directly, I was able to get very good results from Audyssey as usual. I have made one calibration attempt with Dirac and achieved very good results, but I can improve it with further iterations.
Overall, I am pleased with the features and performance of the 4800. However, it needs to last at least 10 years for it to compare with the Sony and Yamaha units I have used in the past, which have lasted 20+ years.
I have researched this and have not found an answer. Is the 4800 supposed to be able to hold both Audyssey and Dirac profiles and allow the user to switch between them for comparison?