Absolute Max voltage is 75 V. The module will shut down with 85 V.An error...
Edit: hmm they are using the higher voltage PSU, the Hypex SMPS1200A700 is 85V. So maybe it is correct then.
Knowing how you are interested in Purifi implementations, it's a pleasure to see how involved you are in this thread. I guess that's because you really like our amplifier and I have to admit that this is quite flattering.It does not only depend on the PSU, see also my post #194 & #271.
Here is a good example with the 1ET400A:
The Dali Kore have an impedance minimum of 3.3Ohms at 65Hz. Considering that these are usually driven with four bridged NAD M23, that's quite a feat for any Purifi module. In bridge mode this impedance is halved for the Purifis, i.e. 1.65ohm and seems to work well in real life (pictures of setup)
With appropriate implementation, the 1ET7040SA should also be able to do more than 950W @ 2ohm.
I also see that you are quite interested in short circuit detection mechanisms that could limit the output power. If you wish to discuss the subject via MP, feel free to contact me, it will be a pleasure to share with you my experience on the matter (I was "Mr. self diagnostics" during my 20 years of work with aerospace and automotive electronics).