Thank you very much for the display of your craftsmanship and the valuable recommendations regarding upgrading the Spectral DMC-10 Alpha.
I will get a Delta version soon and will compare your version with mine. I'm very keen that when the protection circuit kicks in that the apre-amp will not overheat as you described. Which precautions exactly will be necessary that you took?
Is it the increase in resistance from 100 to 400 Ohm for the outputresistors?