Early NuForce amps had serious RFI problems that is, FM radio in the building could not play when someone turned on a NuForce amp. From what I understand, that problem was quickly 90% to 95% fixed by a design change but I wonder whether it was ever 100% fixed.
I'm testing a Wyred 4 Sound STI-500 integrated in my home and there is no RFI problem at all.
So I am left wondering whether class D is prone to RFI problems or merely some early implementations?
Art