Last Fault A 4098 OVER VOLTAGE

[Axel]

Have they gone back to telling you it's the incoming voltage? I'm convinced it's not but could believe support might change tune when they forget.

That's the trouble I'm having with them: they can't tell me anything definitive! However, I came to the conclusion that even if there is a bug with their FW (or a deficiency with the power supply), it must still be triggered by some fluctuations in the mains. I may not see this problem for a month, and then it would happen two times a week. Also, during a thunderstorm I saw it happen several times in a row. Plus many people don't experience the problem at all. Therefore, potentially, it can be fixed by a Voltage Regulator / Attenuator. My problem is that without knowing what exactly triggers this over-voltage fault in Devialet, I can't choose the right device, and some of them are quite expensive.

Is it worth spending any money on? At worst, it causes a split second drop out of sound.
As I quoted from Devialet in one of my earlier posts:

 "In addition, microprocessor control of each amplification channel ensures their constant auto-calibration, as well as limitless protection against all of the following potential hazards: overvoltages, overloads, power pulses, thermal events."

So, with limitless protection, it can’t harm your amp(s), and, as you say, if you don’t know what’s causing it, how can you even begin to cure it? It’s probably one of those things that we’ll never get to the bottom of.
I’ve stopped worrying about it.