Integrated Amplifier - AV-iQ
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Stereo Valve Integrated Amplifier
QUAD II Fée Jatoprateat
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Owner’s Manual
Important Safety Precautions - Please Read Carefully!
This symbol indicates that there
are important operating and
maintenance instructions in the
literature accompanying this unit.
This symbol indicates that
dangerous voltage constituting a
risk of electric shock is present
within this unit,
Read these instructions.
Keep these instructions.
Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with dry cloth.
Do not install this equipment in a confined or
building-in space such as a book case or similar unit,
and remain a well ventilation conditions at open site.
The ventilation should not be impeded by covering
the ventilation openings with items such as
newspaper, table-cloths, curtains etc.
Attention should be drawn to environmental aspects
of battery disposal.
Use of the apparatus in moderate climate.
Do not install near any heat sources such as
radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
Do not defeat the safety purpose of the polarized or
grounding type plug. A polarized plug has two
blades with one wider than the other. A grounding
type plug has two blades and a third grounding
prong. The wider blade or the third prong is
provided for your safety. If the provided plug does
not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
Protect the power cord from being walked on or
pinched, particularly at plugs, convenience
receptacles, and the point where they exit from the
Use only attachments/accessories specified by the
Use only with a cart, stand, tripod,
bracket, or table specified by the
manufacturer, or sold with the
When a cart is used, use caution when moving the
cart/apparatus combination to avoid injury from tip-
Unplug this apparatus during lightning storms or
when unused for long periods of time.
Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as the power-supply cord
or plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has
been exposed to rain or moisture, does not operate
normally, or has been dropped.
Warning: To reduce the risk of fire or electric shock,
do not expose this apparatus to rain or moisture. The
apparatus shall not be exposed to dripping or
splashing and that objects filled with liquids, such as
vases, shall not be placed on apparatus.
No naked flame sources, such as lighted candles,
should be placed on apparatus.
Caution: Changes or modifications not expressly
approved by the manufacturer could void the user's
authority to operate this device.
Warning: The mains power switch for this appliance is
located on the front panel. To permit free access to this
switch, the apparatus must be located in an open area
without any obstructions.
CAUTION: This appliance operates on
very high voltages. DO NOT remove
covers or dismantle. This is very
dangerous and could cause severe shock.
WARNING:For the terminals marked with
symbol of “$” may be of sufficient magnitude to
constitute a risk of electric shock. The external
wiring connected to the terminals requires
installation by an instructed person.
‘The mains plug is used as disconnect device, the
disconnect device shall remain readily operable.
This apparatus is for professional use only.
E Protective earthing terminal. The apparatus
should be connected to a mains socket outlet with a
protective earthing connection.
QUAD IT Classic Integrated
The QUAD II Classic integrated amplifier is a re-interpretation of the legendary QUAD
IT amplifier designed by Peter Walker, founder of QUAD and one of the guiding lights of
early Hi-Fi reproduction.
The QUAD II Classic integrated amplifier is designed for the music lover. We make
no exaggerated performance claims and are content to let the results speak for
themselves. Thank you for purchasing this QUAD equipment. We hope that it will
bring you many years of listening pleasure, and that, like its illustrious predecessor, it
will be a treasured possession for you and for future generations of music lovers.
The QUAD II Classic integrated amplifier carton contains:
e One QUAD II Classic integrated amplifier
e One IEC mains lead fitted with an appropriate mains connector
e Instruction Manual and Warranty Registration form
e One set of packing materials.
Consult the dealer from whom you purchased the equipment if any item is missing.
Please retain the packing materials for future transportation of the product.
Please read this manual in full before installing your new amplifier and retain the
manual and your purchase receipt for future reference.
The mains operating voltage of the unit is indicated on the rating plate attached to the
unit. If this voltage does not match the mains voltage in your area, consult your
QUAD dealer about converting the unit. The fuse rating should be:
220 -240V (UK, Korea, etc.) T2AL 20mm Slow Blow
100-120V (USA, Japan, etc) T 4AL 20mm Slow Blow
Place the unit on a stable rigid surface with at least 1m (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 from 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 surrounding the safe use of the QUAD II Classic Integrated amplifier
Valves Get Hot
Valve power amplifiers generate a lot of heat even with no input so it is vital 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 litter. 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 vibrations. If you place the power amplifier too close to the speakers, direct
sound at high volumes may vibrate the valves. 1 metre (3ft) to the side of each speaker
should be considered a sensible minimum.
Interconnects and Cables
The signal inputs to the amplifier are 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 minimise capacitance and other effects, 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 effect on valve amplifier output stages.
Mains Earthing (Grounding)
This 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 this reason we suggest that you avoid using
interconnects with separate ground wires. If any of your other equipment is grounded
a “hum loop” may arise. If this happens please consult your dealer for advice.
Turntable/tonearm grounding is dealt with on the next page.
Tape Monitor|| Signalinputs | | Tumtable Connections | Loudspeaker Connections |
F IE ; MM/MC | ht Left
used IEC Output Input | Aux Tuner CD | | Ground Signal "Seis Speaker Speaker
Fused EC | — Ga
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Before connecting your amplifier all components in the system must be unplugged at
the mains and the volume control of the amplifier set at zero.
When making stereo connections, RCA plugs and sockets coded white or black usually
indicate the LEFT channel and those coded red the RIGHT channel. In a stereo pair
of sockets 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 a Turntable
Before connecting the unit please read the instructions that came with your pickup
cartridge, turntable and tonearm. Ensure all active units in your system are switched off.
Signal connections: Most tonearms come with captive phono cables. If your turntable
has phono sockets you will need a stereo RCA cable. Connect the turntable phono
outputs to the Phono Inputs. Push the plugs firmly into place to make secure contact.
Ensure the Left and Right channels are correctly connected.
Ground Connections: Most turntable/tonearm combinations use a ground wire;
some use separate ground wires for turntable and tonearm. If your turntable has
phono socket outputs you may need as a ground wire a single length of stranded wire
the same length as the signal cables.
Connect the ground wire/s to the Input Ground terminal, Unscrew the ground
terminal part way and insert the spade connector under the terminal. If the cable does
not have a spade connector, bare a short length of wire and insert this under the left
side of the terminal. Tighten firmly.
Note 1: Some turntables do not use a ground wire but have a cartridge negative return
lead connected internally to the turntable/tonearm chassis.
Note 2: Some cartridges have a negative signal pin linked to the metal cartridge body. If
the cartridge body contacts the tone arm metalwork via the connecting hardware this may
cause a hum loop. Consult your dealer before you remove this link.
Note 3: If you use a high capacitance RCA cable to connect a moving magnet cartridge to
the turntable input you may cause an audible peak in the high frequency response. If you
are in any doubt consult your dealer.
Cartridge Selection
The QUAD II Classic Integrated amplifier accepts a wide variety of magnetic and
= MC moving-coil cartridges. Pressing rhe MM/MC selector button selects moving-coil
O (mc) cartridges; releasing the burton selecrs moving magner cartridges.
== MM Use the MM position for:
e Standard moving magnet cartridges
e High output moving-coil cartridges (read the manufacturer's guide)
e Low ourpur moving-coil carmridges connected via step-up devices (e.g. a m-c
cartridge wich its own transformer or head amplifier),
Use the MC position for:
e Standard low ourpur moving-coil cartridges only.
Note: Low output movine-coil cartridges are very low impedance devices. If you play a
moving magnet cartridge with the selector set to MC you will get huge amounts of distorted
sound with virtually no treble. If you do the reverse the owspus will be very low and shrill
Connecting Line Inputs
Virtually any line level audio source component may be connected to the line level
inpurs. These include tuners, CD players etc.
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 amplifier
Connecting Recording Equipment
Connect a suitable pair of RCA phono cables from che LINE IN or REC sockets of
the recorder vo che TAPE REC sockets of the amplifier.
Connect another pair of RCA phono cables from the LINE OUT or PLAY sockets of
the recorder ro the TAPE PLAY sockets of the amplifier.
Connecting Loudspeakers
Strip any outer sleeve from the loudspeaker cable to a depth of around 40 mm
(1.57).Strip che top 7mm of sleeving to expose the bare wire. If you are using stranded
cable, lightly twist che strands to gather any loose ends.
Partially unscrew the terminal to expose the cross hole ar the terminal base. Push the
bare end of the cable into the hole. Ensure that the polarity is correct and there are no
loose strands which could touch adjacent terminals, Tighten securely.
Standard Wiring
Connect the Left Loudspeaker to the Left channel of the amplifier. Connect the Red
(Positive) terminal of the loudspeaker to the +VE terminal of the amplifier. Connect
the Black (Negative) terminal of the loudspeaker to the VE terminal of the QUAD II
Classic Integrated amplifier. Now connect the Right Loudspeaker to the Right channel
of the amplifier. Ensure that the Left and Right loudspeakers are connected to the Left
and Right channels respectively.
le +
18 6+
Bi-wiring is a technique whereby the treble and bass sections of a loudspeaker are
independently connected to the relevant channel of the amplifier. Not all loudspeakers
can be connected in this way. If your loudspeakers can be bi-wired, you may certainly
bi-wire the QUAD II Classic integrated amplifier to the loudspeakers if you wish.
Follow the recommendations in your loudspeaker user handbook.
Connecting the Mains
Ensure that the ON/OFF switch on the front panel is set to the OFF (fully extended)
Ensue that the volume control on the front panel is at the minimum (fully
anticlockwise) position.
Plug the supplied IEC lead into the mains input socket. Now plug the IEC lead into
the wall socket and switch on" at the mains point.
Plug in the mains leads and switch on the power to your source units.
The system is now fully connected and ready for operation.
Input —
Input Tape Volume Mains
Selector | Monitor Switch
Switching On
Warming Up
Selecting an input
Altering the volume
The tape monitor
After Use
The mains switch is a ‘push ON push OFF type. When the switch is depressed power
is applied, when released, the power is switched off.
Turn the volume control fully anticlockwise to its minimum setting (0).
Depress the ON/OFF switch to switch the amplifier ON.
Allow at least fifteen minutes for the amplifier to ‘warm up’ before use. Warming up
should always be done with the system volume control at zero. After the amplifier has
warmed up fully, the system is ready for use.
Move the Input selector to the left or the right to select the phono or a regular line
input. The input indicator indicates the selected input.
Remember to turn the main system volume control to minimum when changing
inputs, when changing discs, and especially when cleaning your stylus.
Turn the volume control up to a moderate level. Remember the position of the
volume control is NOT an indication of “how loud” your system will play.
The signal from the selected input appears at the Tape Out sockets.
Pressing the tape monitor button in will select the tape input and deselect the other
inputs so that you can listen to your audio recorder. If you have a three head recorder
this enables you to monitor the playback as well as the input when you are making a
Turn the Volume control down.
Always switch the amplifier off.
Running In New Equipment
Running in is very important. Valve components work at high voltages and
temperatures and when new they should spend an extended period at those
temperatures to bed in. We recommend you run the amplifier in for at least four and
preferably twelve hours before you first use it. If you run in your equipment for this
extended period, make doubly sure that all the safety conditions covered in this manual
are fully met. Supervise the equipment for the first hour or so and if you have to leave
the unit unattended thereafter, look in occasionally to make sure all is well.
Warming Up Before Use
Valve Lifetimes
Output Transformer
Allow at least fifteen minutes for the amplifier to 'warm up' before use. If you play
loud music while the system is cold the output valves will not be fully operational and
the amplifier will be starved of voltage and current. The resulting distortion is
unpleasant and potentially damaging to the amplifier's valves and your loudspeakers.
Intensive use of the equipment before it has warmed up will shorten valve life.
Valves contain a heating element. This heats up the valve's cathode, which is coated to
give off a steady stream of electrons. After a few years this coating will begin to wear
out and performance will gradually deteriorate. the KT66 output valves are likely to
deteriorate first but the driver valves will also eventually wear out.
As the valves start to wear out the sound will become less well defined and a lack of
dynamics and power will become evident. Replacing the valves with a new set will
fully restore the audio performance of the amplifier. When replacing valves it is
essential to use the highest quality available. Poor quality valves will adversely affect
the sound quality and may in extreme cases damage the amplifier. When replacing the
output valves, use matched sets for best results.
Do not leave the amplifier permanently switched on or you will seriously shorten
the lifespan of your valves!
After installing or changing the wiring to your speakers, keep the volume control at
zero, let the amplifier warm up and turn up the main volume gradually. If you don't
hear sound, switch off immediately and investigate.
The output transformer is designed to match the high voltage, low current conditions
in which the output valves operate to the low voltage high current requirements of a
loudspeaker. Although robust, an output transformer can be damaged and, in extreme
cases wrecked, by careless use. If you play a valve amplifier into a short circuit, the
output transformer will soak up a lot of energy before failing, but if the short persists
the transformer could be damaged. Operating a valve amplifier at high output levels
with no loudspeaker connected can also damage an output transformer.
Overall Volume Levels
Output levels from different source components in a high fidelity system can vary
widely. A CD player can produce levels significantly higher (>18 dB ) than an FM
tuner. It follows that the position of the volume control is not a guide as to "how loud’
the equipment will go. Though the overload characteristics of the amplifier are such
that you can play your music at surprisingly high levels, if the sound is distorted, you
are overloading your equipment whatever the position of the volume control.
The surface of the equipment may be cleaned with a damp cloth provided that the
power has been removed first. Solvent based cleaning materials should never be used
as they may damage the paint finish.
Your QUAD equipment is guaranteed against any defect in material and workmanship for
a period of one year from the date of purchase with the exception of the valves, which are
warranted for three months. Proof of purchase is required for warranty claims.
Please complete and return the enclosed Warranty registration form. Within the warranty
period QUAD will undertake replacement of defective parts free of charge provided that
the failure was not caused by misuse, accident or negligence. Your statutory rights within
the territory in which you purchased the equipment are not affected by this warranty.
QUAD carries out a regular review of its products and reserves the right to adjust the
specifications and performance from time to time.
If your QUAD equipment requires servicing (including valve replacement) you should
return it to the dealer from whom the equipment was purchased.
If you are abroad and there is no suitable dealer in your area, please contact the
distributor for the country in which it was purchased or QUAD Electroacoustics Ltd.
It is user's responsibility, whether the equipment is under warranty or otherwise, to
ensure that equipment for service is returned carriage paid and in the original
packaging. You should enclose a brief note with your name and address and the reason
for returning the equipment.
International Service Centres
UK: International Audio Group Service Centre, Unit 4, St Margaret's Way, Stukeley
Meadows Industrial Estate Huntingdon, Cambs, PE29 GEB
Tel:+44 (0)1480 447700 Fax: +44 (0)1480 431767
For information on authorised service centres worldwide contact QUAD
Electroacoustics Ltd. A worldwide distributor list is available at
Valves: 4x KT66: 4x I2AX7: 2x 6922EH
Input Sensitivity: 275mV RMS (Line Level & Tape Monitor)
2mV RMS (MM)
200pV RMS (MC)
Output Power: 25W per Channel into 8 Ohms
THD: 0.06% @ 15W (700Hz)
Hum and Noise: Better than -98dBA (ref 25W into 8Q)
Frequency Response: 20Hz — 20KHz (+0dB / -1dB)
Crosstalk: >75dB
Voltage Gain: 34dB
Power Consumption: 195 W (max)
Dimension (H x WxD:) 200x310x380 mm.
Note: Design and specifications are subject to change without notice for improvements.
Important Safety Precautions - Please Read Carefully!
The appliance cord is terminated with a UK approved
mains plug fitted with a 3A fuse. If the fuse needs to
be replaced, an ASTA or BSI approved BS1362 fuse
rated at 3A must be used. If you need to change the
mains plug, remove the fuse and dispose of this plug
safely immediately after cutting it from the cord.
Connecting a Mains Plug
The wires in the mains lead are coloured in accord-
ance with the code: Blue: NEUTRAL. Brown: LIV.:
As these colours may not correspond to the coloured
markings identifying the terminals in your plug,
proceed as follows:
The wire coloured BLUE must be connected to the
terminal marked N or coloured BLUE or BLACK.
The wire coloured
BROWN must be FUSE
connected to the BS 1362
terminal marked L or
coloured BROWN or re
The wire coloured Green/Yellow must be connected to
the terminal marked E or coloured GREEN or marked
with the symbol E
Waste electrical products should not be disposed of with household
waste. Please recycle where facilities exist.
mo] Check with your Local Authority or retailer for recycling advice.
1AG House, Sovereign Court, Ermine Business Park, Huntingdon, Cambs, PE29 6XU, UK
| | A ID Tel: +44(0) 1480 447700 Fax: +44(0)1480 431767 hrtp://
IAG reserve the right to alter design and specification without notice All rights reserved. © [AG Group Led.
Quad is a member of the International Audio Group, CODE-QHI10-MNLO0G4
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