Owner`s manual

INTRODUCTION
You should read the following useful notes before you begin to install and
use the equipment. The notes are directed to the person who is responsible
for the safe installation of the equipment. Minors should not attempt to
install equipment or to carry out changes to electrical installations.
The QUAD QC – twenty four & QUAD II – forty is a valve amplification
system of impeccable performance intended for the highest possible
standard of music reproduction in the home. As the twin monaural power
amplifiers are capable of generating extremely high power outputs it is
particularly important that you read the following instructions with care.
Although this equipment has primarily been designed for use with QUAD
components, it may be connected to any suitable high quality audio source
component and loudspeaker system.
PACKING LIST AND UNPACKING THE EQUIPMENT
The system as supplied comprises one QUAD QC – twenty four
preamplifier and two QUAD II – forty monobloc power amplifiers.
The QUAD QC – twenty four preamplifier carton contains:
QUAD QC – twenty four valve preamplifier
One 2m long IEC mains lead fitted with an appropriate mains
connector
Instruction Manual
Warranty Registration Form
Each QUAD II – forty amplifier carton contains:
QUAD II – forty valve power amplifier
One 2m long IEC mains lead fitted with an appropriate mains
connector
One set of packing materials.
Consult the dealer from whom you purchased the equipment if any of
these items is not present.
Please retain the packing materials for future use or return them to your
dealer. If you decide not to keep the packing, please dispose of it sensibly.
The paper and plastics components are recoverable and may be taken to
an appropriate recovery service.
Please retain the user manual and the information concerning the date and
place of purchase of this equipment for future reference.
Important Note:
As there is a large number of possible installation configurations, QUAD
has taken the decision not to supply interconnects with this product. You
will require two screened interconnect cables terminated with RCA phono
plugs to connect the two QUAD II – forty monobloc power amplifiers to
the QUAD QC – twenty four preamplifier control unit. Please discuss your
individual requirements with your QUAD appointed dealer and be guided
by his advice.
4
Recording, Monitoring and Playback
Selecting either Tape 1 or Tape 2 enables you to play any audio
equipment connected to that input in the same way as the other high level
inputs.
When you select any source from CD, Tuner, Phono, Aux 1 or Aux 2,
the selected source is also connected to the Record outputs of both Tape 1
and Tape 2 so you can record the programme simultaneously on two
recording units in addition to listening via loudspeakers.
If you own a three head tape recorder, by pressing the relevant Tape
Monitor button e when playing any high level source input you can
compare the quality of the recording with the original programme at the
instant of making the recording.
When you play back a recording using either Tape 1 or Tape 2, the
record output to the other Tape unit is disabled. In other words, you cannot
make a recording using a recorder connected to Tape 1 and then re- record
it onto a unit connected to Tape 2, or vice versa. *
Selecting and Deselecting Inputs
Select any high level input source from CD, Tuner, Phono, Aux 1 or
Aux 2. Change your selection and the selector will deselect that input and
select the new one.
If you select Tape 1, you will not be then able automatically to select
Tape 2. You must first deselect Tape 1 by pressing it again and then you
may select Tape 2 (and vice versa).
Volume and Balance Controls
The Volume control h on the QUAD QC – twenty four is a carefully
chosen precision component with exceptional accuracy and close tracking
between channels. It is virtually silent in operation. Rotate the Volume
Control clockwise to increase the volume and counter clockwise to
decrease it.
When the Volume control is fully anti-clockwise the unit is effectively off
and there is no 'knee' in the response if you operate it low down the scale.
The Balance Control g operates as a true Balance Control, altering the
Left- Right Balance by 6 dB in either direction. The control itself is
unusual in that in the centre position it is effectively bypassed thus
ensuring true transparency of operation.
Avoid rapidly swinging these controls and operate the Balance Control
close to the midpoint for best sonic results.
Switching Off
When you switch off the equipment, turn the Volume control to minimum
before switching off the system. The preamplifier should be switched off
last.
*When recording from one recorder to another, connect the unit that will
provide the signal to be recorded as follows:
Connect the REC or LINE IN sockets to the REC outputs (1 or 2) of
the QC – twenty four.
Connect the LINE OUT or PLAY sockets from this unit to a spare
high level input, e.g. Aux 1.
When you select the chosen input (e.g. Aux 1) this signal may now be
recorded on the other recording unit.
Note: This procedure should not be used with a three head tape unit.
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