"I cannot hear any trace of harmonic distortions on the 3rd or any other partials when I play music with my class D Rowland M925 monos or class D Rowland Daemon integrated.... Nor do they intermodulate. They are as sweet and stunning as can be."
+1 guidocorona
I also hear no traces of harmonic distortions on the 3rd or any other partials when I play music with my, much less expensive, class D D-Sonic M3-600-M monos or 2 other class D amps that I formerly used for music but currently use for HT 5.1 surround sound, an Emerald Physics EP100.2-SE and a Class D Audio SDS-440-CS, which are both excellent performing and very reasonably priced stereo class D amps.
In general, I view class D amps as an excellent alternative to the more traditional ss and tube amp types that represent a bit of a revolutionary approach and a breath of fresh air. They're the very competent, silent, efficient, straight talking and cool running guys in the amp neighborhood who just even handedly and confidently tell us what's what without distortion or ever getting overheated.
No, they don't all sound the same, not everyone likes them, some refuse to even listen to them, some are prejudiced or jealous and others just bad mouth them out of habit. But these confident, competent and cool guys don't care. They know how good they already are, that they're constantly only getting even better and that their technological future is bright.
Tim