[stevehertz]

Originally Posted by Radio Wrangler

HMV in the early seventies were rather behind the times. Their equipment was priced up the top end of the domestic market, but accountants had been busy on the innards.

So they clung on to germanium transistors quite late, and used small devices rather than proper power jobs, even when silicon was becoming common. These small devices tended to be more limited in current ratings than in voltage, by later standards, so the way to squeeze the most out of them was to use a higher impedance load. So they had high impedance speaker drivers made.

David

Interesting David, thanks. Makes 'sense'.