Thanks, Neil, for your response. If you can, please tell more about your "Custom Silent Media Server" - it sounds intriguing!
Just for fun while here in the office on an overcast Saturday in Hong Kong, I decided to open up the other Magnum Audio A.100 Mono-Block to see if the insides differ from the first one I posted above. It appears they do slightly, though I'll defer to the Forum's experts.
Here are the pix: