"Even though the Spectron is a class D amp it is still solid state"
How so? Congress decided or you, personally?
- shred of evidence, suggestion, a clue would be most welcome
If you want to say that pulse modulation is made by two transistors then please don't - they are, at least in Spectron, out of signal pathway and out of power supply too. Its not amplification device (as transistor or tube are in transistor or tube amps) - nor do you have transistor's pattern of distortions (0.0000%)
so...?