Owner`s manual

To connect a cable to the Ground terminal:
 Partially unscrew the top section of the terminal. Strip about 8mm of
insulation from the ground wire and curl the bared end clockwise around the
terminal post. Tighten securely, but do not overtighten.
Connecting the QC – twenty four to a power amplifier (refer to fig. c on the drawing above)
The QC – twenty four is provided with two preamplifier outputs. These are
identical in specification and are provided solely for the purposes of bi-
amplifying in conjunction with a second pair of QUAD II – forty power
amplifiers. They should not be used to run a second pair of amplifiers in a
remote location as the lumped effect of long cable runs and low impedance
loading may seriously impair the system's high frequency performance.
Caution! Always make sure that the preamplifier, all associated source units
and especially the power amplifiers are switched off at the mains when
connecting or disconnecting power amplifiers or any source components.
To connect a stereo or two monobloc power amplifiers:
 Connect a pair of high quality screened cables terminated in RCA phono
plugs from the chosen pair of OUTPUT sockets (fig. c) of the QC – twenty
four to the line input of the power amplifier.
Note: Some power amplifiers have two sets of line input sockets, one pair going
via a volume control or other attenuator internal to the power amplifier, one
going direct to the power amplifier inputs. In all such cases the direct input is the
preferred choice.
Refer to Page 11 for connections to the QUAD II – forty power amplifiers.
When making stereo connections from the QC – twenty four to source
components or to power amplifiers, plugs and sockets coded white or black
usually indicate the LEFT channel and those coded red the RIGHT channel.
In a stereo pair the upper socket is usually the Left Channel and the lower
socket the Right. If you are in any doubt, consult a qualified dealer.
Connecting Source Components (refer to fig. e on the drawing above)
Virtually any line level audio source component may be connected to the line
level inputs e. These include tuners, CD players etc. When the QC – twenty
four is switched on, the CD input will always be selected first.
To connect a source component to the QC – twenty four:
 Connect a pair of high quality screened cables terminated in RCA phono
plugs from the LINE OUTPUT of the source component to the chosen
input of the QC – twenty four.
Connecting Recording Equipment (refer to fig. d on the drawing above)
To connect an audio recorder:
 Connect a suitable pair of RCA phono cables from the LINE IN or REC
sockets of the recorder to the REC sockets of Tape 1 or Tape 2 of the QC –
twenty four.
 Connect another pair of RCA phono cables from the LINE OUT or
PLAY sockets of the recorder to the PLAY sockets of Tape 1 or Tape 2 of the
QC – twenty four.
Connecting a Turntable (refer to figs. f and g on the drawing above)
As supplied, the PHONO input of the QC – twenty four is a line level input
and operates exactly as the other preamplifier line inputs. You cannot connect
a regular turntable to this input as supplied. An optional RIAA module will
be available in due course to enable the phono input to be fully operational
with a standard phono cartridge. If you have an external phono preamplifier
with an output at line level, you may connect the output of that unit to the
PHONO input of the QC – twenty four as supplied.
To connect a turntable to a QC – twenty four fitted with an RIAA module:
 Connect the phono leads from the tonearm (or from the phono output
sockets) of the turntable assembly to the PHONO inputs f of the QC –
twenty four.
 If there is a ground wire on your turntable (and/or arm) connect this to
the Ground terminal g of the QC – twenty four. If your turntable has a
ground terminal, connect this to the Ground terminal g of the QC – twenty
four with a single wire.
100V~60HzT200mA Fuse
230V~50HzT100mA Fuse
R
L
Play Rec RecPlay
MADE IN ENGLAND BY QUAD ELECTROACOUSTICS LTD
NO USER SERVICEABLE PARTS INSIDEDO NOT REMOVE THE COVER
CD Tuner Aux2Aux115VA Tape 1
Output
PhonoTape 2
Fused IEC
Mains Input
Preamp
Outputs
Tape Monitor
Inputs & Outputs
Line Level
Inputs
Phono Input
Signal Ground
Connecting the QUAD QC – twenty four Preamplifier Control Unit
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