I have to 'fess up. I had such an amplifier for a few years - a Krell KSA100. This was dual mono in a common chassis. Two massive toroids etc, and two fan cooled heatsink chimneys with four pairs of TO3 can output devices on each.
It was a hernia inducing monster that chucked out 500W of heat.
And because of the stresses on the output devices it blew up spectacularly twice. Once after I had sold it, and the buyer was in transit from Kent to collect it.
If you are remotely interested in my audio insanity when in my 30's, this is what they look like
https://www.lfgss.com/conversations/324270/
Craig