QUAD Vacuum Tuber Amplifier Systems QUAD II-FORTY - Manual (Page 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’.
“It is so much better in terms of high fidelity, in its
purest sense. It reminded me how Quad retain an
almost unique grip on the concept.”
– Noel Keywood, hi-Fi World
QC-twentyfour
The Quad
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