08-Feb-2019, 10:34
I have monitored the voltage when the bug occured, and it was 237v, so I'm confident that the issue is not incoming supply voltage. I gave some logic to why I am convinced it's not supply voltage somewhere else in this thread, but I'll add some other thoughts to why it's not.
I could make this happen at will (give or take 30 mins) with specific settings, but just changing the SAM % a tiny bit would make it very infrequent. When Devialet support sent me a 440 to test this with I made it go wrong with my bad settings very quickly.
I don't believe a true mains overvoltage that was detected would behave like it does, I would expect the amp to shut down, not gracefully mute for a second and them continue.
It affects people in 120v places, not just 240v countries, but the units are universal and auto adjusting.
I also get a lot less of these since the CI board, and can no longer make it happen at will, they could have changed something in the upgrade that they have not spoken about, but the firmware fix for this was promised as part of the CI firmware, so it's more likely that.
Is over 250v legal for Australia, I found the following that suggests it may well be.
http://www.ewh.ieee.org/r10/nsw/subpages...ltages.pdf
The UK is nominaly 230v, but it's really 240v, with 253v being the top of the legal range, and it seems to be well regulated where I live with little variation.
I could make this happen at will (give or take 30 mins) with specific settings, but just changing the SAM % a tiny bit would make it very infrequent. When Devialet support sent me a 440 to test this with I made it go wrong with my bad settings very quickly.
I don't believe a true mains overvoltage that was detected would behave like it does, I would expect the amp to shut down, not gracefully mute for a second and them continue.
It affects people in 120v places, not just 240v countries, but the units are universal and auto adjusting.
I also get a lot less of these since the CI board, and can no longer make it happen at will, they could have changed something in the upgrade that they have not spoken about, but the firmware fix for this was promised as part of the CI firmware, so it's more likely that.
Is over 250v legal for Australia, I found the following that suggests it may well be.
http://www.ewh.ieee.org/r10/nsw/subpages...ltages.pdf
The UK is nominaly 230v, but it's really 240v, with 253v being the top of the legal range, and it seems to be well regulated where I live with little variation.
Roon, Rega P9 + Dynavector XX2Mk2 > 440 Pro > Sonus Faber Guarneri Evolution
