"Andre Jute" wrote in message
...

You can't have it both ways, sonny. You claim the Quad 405 is a model
of efficiency. Then you tell us that in strenous use the huge Quad 405
heat sink does not get warm. Therefore the heatsink is overspecified
and the amp is not efficient. An efficient amp would use its heatsink
more efficiently.

Yes he can. From an electrical (electronic) engineering point of view,
the amp is obviously efficient as it isn't pumping out heat. From a
production
engineering point of view it is inefficient as it could have been made a few
dollars cheaper with a smaller hotter heat sink. Personally my sympathies
are with the electrical engineering side and I would have thought that yours
would be too.

Keith