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INSTALLATION
P]ace the unit on a stable rigid sur&ce with at least Im (3ft.) of free space above it. If
you are using a turntable, ensure that the tonearm is least 400 mm away from the
amplifier to minimise any hum conduction and ideally on a separate shelf. If you have
to use the turntable and the amplifier on the same surface, place the turntable to the
right of the amplifier to maximise the distance between the tonearm and the amplifier.
Avoid placing the amplifier in front of the loudspeakers to avoid vibrations fioro the
speaker drive units causing microphonics in the amplifier and degrading the sound.
If this is your first valve amplifier please familiarise yourself with some important
issues surroundlt^ the safe use of the QUAD II Classic Int^raied amplifier
Valves Get Hot
Valve power amplifiers generate a lot of heat even with no input so it is ntal to ensure
adequate ventilation for your amplifier.
Although the protective cages over the valves get hot they are very unlikely to cause a
burn. For absolute safety the unit should be placed out of the reach of children and
pets and away from heat-sensitive objects.
Valve Amplifiers Work at High Voltages
Valves require a high voltage to function. Do not open the case. Also ensure that
nothing is poked, dropped or poured into the amplifier's case.
The environment should be dry and free from liner. Do not place magnetically or
thermally sensitive objects (i.e. credit cards or optical discs) close to the unit.
Valves are Microphonic
Because valves are constructed from fine wires and tiny metal parts they can pick up
external vibratiotts. If you place the power amplifier too close to the speakers, direct
sound at high volumes may vibrate the valves. 1 metre (3ix) to the side of each speaker
should be considered a sensible minimum.
Interconnects and Cables
The signal inputs to the amplifier ate via RCA phono connectors. As valve equipment
works at high impedances, the phono interconnects from source units, and especially
from the pickup cartridge should be well screened and of a low-noise, low-capacitance
construction. To minimbe capacitance and other ef^ts, signal interconnects should
be kept as short as possible.
Choose good quality loudspeaker cable designed for the purpose rather than general
purpose 'zip' or 'bell' wire. The cable should be of adequate gauge to maximise bass
performance. We do not recommend high inductance or capacitance cables as these
can have a significant and deleterious ef&ct on valve amplifier output stages.
Mains Earthing (Grounding)
Thb amplifier requires connection to an earthed (grounded) mains supply. In your
sound system, the amplifier should be the only device connected to mains ground to
negate hum induced by ground loops. For thb reason we surest that you avoid using
interconnects with separate ground wires. If any of your other equipment b grounded
a "hum loop" may arise. If thb happens please consult your dealer for advice.
Turntable/tonearm grounding is dealt with on the next page.
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