Great that it looks like there's a good outcome coming out of this!
But even i'm pissed off, not used in the proper way intended? how exactly? he hooked it up at a 16/8/4ohm resistance, exactly like its $%ing intended to!
Hell you could have even quoted the THD website, as it has a long bit on how it states it does not damage the amp one bit.
Doesn't matter if it's speakers, hot plate, palmer, big resistor with a load out... its designed to work with a resistance.
the bit from THD -->
Will it hurt my amp?
The THD Hot PlateŽ will not damage your amplifier. When you play continuously at full output, you cause your tubes to age more quickly than they would at lower volumes. Using a Hot PlateŽ will maintain the life of your tubes at exactly the same rate, no more or less, as when you play straight through the speaker.
Using a Hot PlateŽ will also not hurt your transformer any more than playing through a speaker, as long as the impedances are matched (i.e. 8 ohm setting on the amp, 8 ohm speakers and an 8 ohm attenuator). If you are using a well-made amp, then the transformer should last indefinitely, regardless of whether you are driving a speaker or attenuator. If you are using an inferior amp and the transformer blows, it would have done this whether you play through a speaker or an attenuator. The Hot PlateŽ puts the same load on the transformer as a speaker (which is why it makes such a good dummy load).