QUAD Vaccume Tube Amplifier Systems - Manual (Page 6)

6
Unlike the power amplifiers, the Quad Control unit
utilises a completely new circuit design. Once again, the
circuit is simple in concept yet remarkable in execution.
Our designers scoured the globe for the very finest
components, with possibly the best example of this
being the new ‘old stock’ 6111WA double triode.
Designed as a special military valve, it is hard wired to
the circuit and has an estimated life of nearly 100,000
hours. Together with transformers designed by one of
the World’s leading authorities and relay input
switching, the musical signal is preserved in its purest
form - pursuant to the philosophy of the theoretical
perfect amplifier which, as Peter Walker himself stated, is
‘a straight wire with gain’.
QC-twentyfour
The Quad