I am so pleased that others with, apparently, endless patience and REAL knowledge, have taken the time to contribute positively to this thread.
For me, it doesn’t matter that some of the posts have been made by suppliers / manufacturers. What matters is the quality of information and the clearly stated reasoning behind their position that the right Class D amp, properly designed and built, will drive heavy-load speakers.
There is an obvious point to me: certainly for EU/UK law, products that don’t do what is claimed will very quickly mean suppliers / manufacturers will be brought to book in the context of trading / consumer legislation. Also, most suppliers presumably rely on reputation. If they supplied goods that didn’t do as claimed, that reputation would be damaged pretty quickly.
To those who have contributed constructively, retaining their cool in the face of substantial provocation, I for one appreciate it.
K (definitely not a seller of hi-fi equipment)