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Quicksilver Mono 100's

I am considering the Quicksilver Mono 100's as amps for my Quad 988's. However, there is something I don't really understand about these amps. The amps produce 100 watts per side from only two KT88 or 6550 tubes. The total tube compliment is: 1 12AX7 input, 1 12BH7 driver, and the above mentioned output tubes. I don't understand how they get 100 watts out of just these two output tubes. Are they cooking those tubes with high voltage? Running them into class B? What are the implications for the sound of this amp? Has anyone spent time auditioning it? Thanks.
peter_s

Showing 2 responses by marakanetz

marakanetz's avatar
marakanetz
5,473 posts
 
high biased beam tetrodes do produce 100W per pair.
the question than lies in its longetivity and overall reliability of the component.
marakanetz's avatar
marakanetz
5,473 posts
 
80ma is still high bias current but the good thing that you need to retube with 2 tubes per channel instead of eight or more.
as far as i know quickies have pretty solid circuit protection in case the tubes goes bad to blow grid resistor first before it goes to the plate shortage.
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