Quad II Classic Owners manual

Quad II Classic

Monobloc Valve Power Amplifier

KT 66 KT 66

Quad Electroacoustics Ltd, IAG House,
Sovereign Court, Ermine Business Park,

Huntingdon PE29 6XU

England

www.quad-hifi.co.uk

Tel: [phone] Fax: [phone]

Classic

Owner’s Manual

Important Safety Precautions - Please Read Carefully!

CAUTION!

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF ELECTRIC SHOCK

DO NOT REMOVE COVER (OR BACK)

NO USER-REMOVEABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED PERSONNEL

ADVERTISSEMENT: RISQUE DE CHOC ELECTRIQUE-

The lightning flash with arrowhead symbol, within an equilateral triangle, is
intended to alert the user to the presence of uninsulated dangerous voltage within
the product’s enclosure that may be of sufficient magnitude to constitute a risk of
electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to
the presence of important operating and maintenance (servicing) instructions in
the literature accompanying the appliance.

Read Instructions: All the safety and operating instructions should be read before the product is operated.
Retain Instructions: The safety and operating instructions should be retained for future reference.
Heed Warnings: All warnings on the product and in the operating instructions should be adhered to.
Follow Instructions: All operating and use instructions should be followed.
Cleaning: Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners.

Use a damp cloth for cleaning.

Attachments: Do not use attachments not recommended by the product manufacturer as they may cause hazards.
Water and Moisture: Do not use this product near water - for example, near a bath tub, wash bowl, kitchen sink,

or laundry tub, in a wet basement; or near a swimming pool; and the like.
Accessories: Do not place this product on an unstable cart, stand, tripod, bracket, or table. The product may fall,

causing serious injury to a child or adult, and serious damage to the product. Use only with a cart, stand, tripod, bracket
or table recommended by the manufacturer, or sold with the product. Any mounting of the product should follow the
manufacturer's instructions, and should use a mounting accessory recommended by the manufacturer.

Moving the Product: A product and cart combination should be moved with care. Quick stops, excessive force, and
uneven surfaces may cause the product and cart to overturn.

Ventilation: Slots and openings in the cabinet are provided for ventilation and to ensure reliable operation of the
product and to protect it from overheating, and these openings must not be blocked or covered. The openings
should never be blocked by placing the product on a bed, sofa, rug, or other similar surface. This product should not
be placed in a built-in installation such as a bookcase or rack unless proper ventilation is provided or the
manufacturer's instructions have been adhered to.

Power Supply Cords: Power supply cords should be routed so that they are not likely to be walked on or pinched by
items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the
point where they exit from the product.

Power Sources: This product should be operated only from the type of power source indicated on the marking
label. If you are not sure of the type of power supply to your home, consult your product dealer or local power
company. For products intended to operate from battery power, or other sources, refer to the operating instructions.

Polarisation: This product is equipped with a polarized alternating-current line plug (a plug having one blade
wider than the other). This plug will fit into the power outlet only one way. This is a safety feature. If you are unable
to insert the plug fully into the outlet, try reversing the plug. If the plug should still fail to fit, contact your electrician
to replace your obsolete outlet. Do not defeat the safety purpose of the polarized plug.

Lightning: For added protection for this product during a lightning storm, or when it is left unattended and unused

IMPORTANT NOTICE TO UK USERS

The appliance cord is terminated with a UK approved mains plug fitted with a 5A fuse. If the fuse needs to be

replaced, an ASTA or BSI approved BS1362 fuse rated at 5A 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 accordance with the code:
Blue: NEUTRAL Brown: LIVE Green & Yellow: EARTH.

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 with the letter N or coloured BLUE or BLACK. The wire
coloured BROWN must be connected to the terminal marked
with the letter L or coloured BROWN or RED. The wire
coloured GREEN & YELLOW must be connected to the
terminal marked with the letter E or coloured GREEN or
GREEN & YELLOW or marked with the Earth Symbol

NE PAS OUVRIR

GREEN

YELLOW
(EARTH)

&

BLUE

(NEUTRAL)

FUSE
(5 A)

BROWN

(LIVE)

Example of Antenna Grounding

Example of Antenna Grounding

as per National Electrical Code

as per National Electrical Code

Electric service

Electric service

equipment

equipment

for long periods of time, unplug it from the wall outlet and disconnect the antenna or cable system. This will prevent
damage to the product due to lightning and power-line surges.

Antenna Grounding: If an outside antenna or cable system is connected to the product, be sure the antenna or cable
system is grounded so as to provide some protection against voltage surges and built-up static charges. Article 810 of
the National Electrical Code, ANSI/NFPA 70, provides information with regard to proper grounding of the mast and
supporting structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding conductors, location
of antenna-discharge unit, connection to grounding electrodes, and requirements for the grounding electrode. (Refer to
diagram)

Power Lines: An outside antenna system should not be located in the vicinity of overhead power lines or other
electric light or power circuits, or where it can fall into such power lines or circuits. When installing an outside
antenna system, extreme care should be taken to keep from touching such power lines or circuits as contact with
them might be fatal.

Overloading: Do not overload wall outlets, extension cords, or integral convenience receptacles as this can result
in a risk of fire or electric shock.

Object and Liquid Entry: Never push objects of any kind into this product through openings as they may touch
dangerous voltage points or short-out parts that could result in a fire or electric shock.

Heat: The product should be situated away from heat sources such as radiators, heat registers, stoves, or other
products (including amplifiers) that produce heat.

Servicing: Do not attempt to service this product yourself as opening or removing covers may expose you to
dangerous voltage or other hazards. Refer all servicing to qualified service personnel.

Damage Requiring Service: Unplug this product from the wall outlet and refer servicing to qualified service
personnel under the following conditions:

a) When the power supply-cord or plug is damaged
b) If liquid has been spilled, or objects have fallen into the product
c) If the product has been exposed to rain or water.
d) If the product does not operate normally by following the operating instructions. Adjust only those controls that are
covered by the operating instructions as an improper adjustment of other controls may result in damage and will often
require extensive work by a qualified technician to restore the product to its normal operation.
e) If the product has been dropped or damaged in any way.
f) When the product exhibits a distinct change in performance - this indicates a need for service.
Replacement Parts: When replacement parts are required, be sure the service technician has used replacement
parts specified by the manufacturer or have the same characteristics as the original part. Unauthorised
substitutions may result in fire, electric shock, or other hazards.
Safety Check: Upon completion of any service or repairs to this product, ask the service technician to perform
safety checks to determine that the product is in proper operating condition.

Warning: To resist the risk of fire or electrical shock, do not expose this product to rain or moisture. The product
must not be exposed to dripping and splashing and no object filled with liquids - such as a vase of flowers - should
be placed on the product.

No naked flame sources - such as candles - must be placed on the product.
Service: Equipment for sevicing should be returned to the suplying dealer, or to the appointed service agents for

your area. The addresses of Service Agents for the UK , USA and Canada are listed on the rear cover of this manual.

WARNING

The mains power switch for this appliance is located on the rear panel. To permit free access to this switch the
apparatus must be located in an open area without any obstructions.

CAUTION

Use of controls or adjustments, or the performance of procedures other than those specified may result in hazardous
radiation exposure.

IMPORTANT NOTICE

The IEC socket which fits into the mains connector located on the rear panel of this unit is a moulded unit.
If this unit becomes damaged in any way do not attempt to repair or connect a replacement plug to the cord.

Consult your dealer to purchase a suitable replacement.

WARNING

This equipment uses valves (tubes) which get hot. Do not touch the glass envelopes of the valves while the
equipment is in use or within 30 minutes after the equipment has been switched off.

Power service grounding electrode system

Power service grounding electrode system

(NEC ART 250, Part H)

(NEC ART 250, Part H)

Ground clampsGround clamps

Antenna lead in wireAntenna lead in wire

Ground clampsGround clamps

Antenna discharge unit

Antenna discharge unit

(NEC Section 810-20)

(NEC Section 810-20)

Grounding Conductors

Grounding Conductors

(NEC Section 810-71)

(NEC Section 810-71)

Service & Information

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.

Authorised QUAD Service Centres in the U.K. and North America

USA

IAG America, Inc.

15 Walpole Park South

Walpole

MA 02081

Tel: [phone]

QUAD Electroacoustics Ltd.

IAG House, Sovereign Court,

Ermine Business Park,

U.K.

Huntingdon,

Cambs PE29 6XU,

England.

Tel:[phone]

Fax:[phone]

For information on authorised service centres worldwide contact QUAD Electroacoustics Ltd. A worldwide distributor
list is available on the QUAD website:

www.quad-hifi.co.uk

CANADA

Korbon Trading Ltd

6800 Kitimat Road

Units 19-20
Mississauga

Ontario

Tel: [phone]

SPECIFICATIONS

Quad II Classic Monobloc valve power amplifier

Input sensitivity 1.4V RMS

Power output 15W RMS

Output Impedance 8 Ohms

THD @ 700 Hz 0.3% @ 12w

Residual hum and noise Better than -90 dB

Frequency response 10 Hz - 20 kHz (± 0.2 dB)

Damping factor 11.75 @ 700 Hz (referred to 8 Ohms)

Power consumption 90VA maximum

Valves 2 x EF86, 2 x KT66, 1 x GZ34

Dimensions (mm) 335 x 121 x 171

Weight 8.3 Kg

QUADII Classic Manual 0405 Issue 2