On Thu, 24 Jan 2008 14:23:19 -0800 (PST), Andre Jute
wrote:

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.

That isn't what "efficiency" means in this context, as well you know.