Quad QC24 Valve Pre Amplifier

Here we have a classic QC Twenty-Four preamplifer from Quad, styled with a definite nod to the past designs of the company. The unit has been cleaned and tested and is now in good fully working condition noting a couple of small blemishes which can be seen in the photographs. It is fitted with the optional phono board, comes professionally packaged and as always has our standard three month warranty.
Quad Say….
The QC Twenty-Four preamplifier uses a radically new and functionally simple audio circuit and features relay input switching to preserve signal purity. With modern high-quality recording and reproduction equipment tone controls are now redundant and so the QC Twenty-Four dispenses with them. The styling of the QC Twenty-Four is classic QUAD and matches the QUAD II – forty.
The QC Twenty-Four and QUAD II – forty are designed for the music lover. We make no exaggerated performance claims and are content to let the results speak for themselves.
With the QC Twenty-Four preamplifier, our designer 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.
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 Peter Walker himself stated is, ‘a straight wire with gain’.
The QC Twenty-Four has 2 main outputs, 2 Tape Play and Record connections and inputs for CD, Tuner, Aux 1, Aux 2 and an optional Phono port.
Specifications:
Valve Complement: 1x 6111 twin triode
THD @ 1V RMS: <0.2%
Frequency Response: 5Hz – 50kHz (+0dB/-0.5dB)
Hum and Noise: Better than -80dB
Line Stage Gain: 15dB
Recommended Minimum Load: 50 k Ohms
Inputs: 5 x Line level; 2 x Buffered tape loops
Power Consumption: 15VA maximum

For a review from What Hi-Fi? magazine please click here

For a review from Hi-Fi World magazine please click here

And another from the same magazine but a few years later please click here