^^ one of the artifacts of Class D is is that there can be intermodulations between the scan frequency and the the signal being amplified.
You can see this in the specs if the spectrum of distortions is graphed. So there isn't a lack of evidence!
In the digital world, they call this 'aliasing'. In the analog world (and since Class D is an analog process) we call it 'inharmonic distortion' to distinguish it from 'intermodulation distortion'; the latter being intermodulations between tones being amplified.
This is why the artifact of Class D is different from traditional solid state. The artifacts are similar to those of digital and you see many of the same complaints leveled against it- cold, sterile, that sort of thing.
Its a simple technology, and that seems in a way to belie the issues of how to correct the artifacts, which is rather tricky. Like digital though it is a rising star in high end audio (many think its already arrived but the fact that this thread exists is evidence that it has a ways to go, otherwise it would have completely supplanted tubes and traditional transistors; since it hasn't, we know without needing to know technical issues that its got a ways to go) and its potential can't be ignored (which is why we've been investigating and working on class D ourselves).
You can see this in the specs if the spectrum of distortions is graphed. So there isn't a lack of evidence!
In the digital world, they call this 'aliasing'. In the analog world (and since Class D is an analog process) we call it 'inharmonic distortion' to distinguish it from 'intermodulation distortion'; the latter being intermodulations between tones being amplified.
This is why the artifact of Class D is different from traditional solid state. The artifacts are similar to those of digital and you see many of the same complaints leveled against it- cold, sterile, that sort of thing.
Its a simple technology, and that seems in a way to belie the issues of how to correct the artifacts, which is rather tricky. Like digital though it is a rising star in high end audio (many think its already arrived but the fact that this thread exists is evidence that it has a ways to go, otherwise it would have completely supplanted tubes and traditional transistors; since it hasn't, we know without needing to know technical issues that its got a ways to go) and its potential can't be ignored (which is why we've been investigating and working on class D ourselves).