Stereo Control Amplifier (1978)
The Quad 33 selects and controls the radio tuners, gramophone pickup and tape recorder connected to it and feeds the loudspeakers via the power amplifier, providing for stereo, mono on either or both channels, from all inputs, plus monitoring and track selection facilities for tape.
Quad units may be used either free standing or mounted in a cabinet with plenty of scope for individual preference in layout.
The standard Quad system of mounting is used, requiring only a rectangular cut-out for which a template is provided.
The controls are comprehensive but simple and are logically grouped to facilitate selection and control of the programme.
The filter is essential with modern good quality speakers and helpful at any time.
It removes surface noise, tracing distortion and similar shortcomings in the upper frequency range of the recording or broadcast, and the two control filter system achieves this to a very fine degree without intruding unnecessarily into the harmonic range so essential for realistic reproduction.
Frequency response: 30Hz to 20kHz
Total harmonic distortion: 0.02%
Input sensitivity: 2mV (MM), 100mV (ceramic), 100mV (line)
Signal to noise ratio: 70dB (MM), 85dB (line)
Output: 100mV (line), 0.5V (Pre out)
Dimensions: 260 x 92 x 165mm
instruction/owners manual - Quadmann
issue 2 service supplement - Quadmann
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Reviewed Feb 21st, 2015 by desertdog
Still in use today, best tone controls ever.
Reviewed Oct 26th, 2013 by davjoma
Had mine since new in 1977. Coupled with 303 amplifier driving Spendor BC1s. A classic mid-range system. Sounded excellent back then and still does today. i've had the pre-amp serviced twice by Quad to rectify some minor faults. Otherwise perfect.