Acoustical Manufacturing Co. Quad 34 User manual

34
CONTROL
I]NIT
INSTRUCTION
BOOK
ALTAD

CONTENTS
INTRODUCTION
GUARANTEE
SERVICE
ACCESSORIESSUPPLIED
INSTALLATION
Ghecking
the
AGPower
Supply
Connecting
tothe
ACPower
Supply
ACPowerOut
Positioning
the
GontrolUnit
GonnectiontotheAmplifier
Changing
Output
Level
SignalGonnections
SWITCHINGONANDOFF
CONTROLFUNCTIONS
Volume
Balance
ilono
Titt
BassLift/Step
Filterc
TAPERECORDERS
Recording
Monitoring
MAINTENANCE
FRONTAND
REARVIEW
Connecting
Sockets
SPECIFICATION
Tilt,Bass
LifUStepandFilter
Graphs
page
2
2
2
3
3
3
3
3
4
4
5
5
5
5
6
6
6
6
6
6
6
6
6
6
7
7
8
inside
backcover
inside
backcover
ACCESSORTES
page
1

INTRODUCTION
GUARANTEE
SERVICE
The
Quad
34
is
ahigh
quality
controlunit
withinputs
forCD
player,
tuner,tape
recorderanddisc.Therequiredinputisselectedbylightaction
press
buttons
andallswitchingissolidstateformaximumreliabili$andsilentselection.
Volumeadjustmentisbya
precision
steppedrotary
control.
Pressbuttonfilters
togetherwithrotarytilt,bassandbalancecontrolsenable
the
listenertocorrect
for
certain
room
effectsand
programme
balance
ProvisionismadeforchangingthesensitivityoftheCDinputandthetape
recorderinpuUoutputbyreplacing
plug-in
'flags'
(resistors)
intoresistorsockets
onthemaincircuitboard.
The
performance
ofthe
Quad
34controlunit
is
asaccurateas
itis
possible
to
achievebycarefuldesign,
selectionofcomponentsandrigoroustestprocedures.
The
Quad
34controlunitisguaranteed
fortwelvemonthsfromthedate
of
purchase.
Withinthis
period
weundertake
to
supply
replacement
parts
freeof
charge
provided
thatthe failure
was notcausedby misuse,accidentor
negligence.Returnfreightandthird
party
labour
costsare
notcoveredunless
by
localagreement.
WithintheUKthis
guarantee
doesnot
limit
your
statutory
rights.Aseparate
guarantee
cardis notsuppliedand
yourguarantee
beginsonthedayof
purchase.
lfthecontrolunitrequires
serviceitshouldbereturnedtothesupplier,
the
distributorforthecountry
of
purchase
or
Quad
Electroacoustics
Ltd.
Pleaseencloseabrief
note
givingyour
nameandaddressandthe
reasonfor
returningit.
Quad
offerasameday
servicefromMondaytoFridayexcept
forBankholidays.
Pleasecontactustomakeanappointment.
lmportant Retaintheoriginalcartonand
internal
packing
incasethecontrol
unithastobe
returnedforservice.
Howto Find us
page
2

ACCESSORIES
SUPPLIED
INSTALLATION
AC
supplylead
2mlong
ACEuro
typeoutput
connector
2x100mVrecord
flags
2x100
mVreplay
flags
Type
No. QUKES2B
TypeNo. PPR0413
TypeNo. Q34100R
Type
No. Q34100P
The
34control
unitisdesigned
tooperate
ononerange
ofAC
powersupply
only,
50/60Hz.
either200-240V
or1001120V
.Thecorrect
operating
voltageis
ctearty
marked
ontheback.ltmaybechanged
from220V
to110V
operationorvice
versa
byasuitably
qualified
technician.
Before
connecting
to theACpower supplycheck
that thevoltage
range
marked
on thebackcorresponds
with thatof thesupply.
The34
controlunitis
suppliedwith
anAC
power
leadwith
a13A3
pinplug
with
13Afuse.
Donot
cutoffthis
plug
oruseitwith
itsfuse
coverremoved.
lfhowever
for
anyreason
the
plug
has
toberemoved
thenitmust
bedisposed
ofandunder
no circumstances
plugged
into
a 13A socket
outlet.Asuitable
plug
canbe
fitted,as
explained
below:-
WARNING:
THISAPPARATUS
MUSTBE
EARTHED
IMPORTANT
-Fitting
amains
ptug.
Thewires
inthemains
lead
arecoloured:
Brown=Live Blue
= Neutral GreenMellow
= Earth
TheBrownwire
must
beconnected
totheterminal
marked
Lorcoloured
Red.
TheBlue
wiremust
beconnected
totheterminal
marked
NorcolouredBlack.
The GreenNellow
wiremustbe connected
to theterminal
markedE or
colouredGreen
orGreenl/ellow.
Whenafused
13A
plug
isused
a13A fuse
(ASTA
approved
to8S1362)
willbe
adequatefor
atypical
Quad
system.
Forother
types
of
plug,
then
fita13Afuse
eitherin
the
plug,
oradaptor,or
atthedistribution
board.lfin
doubtconsult
a
qualified
electrician.
The
control
unitisfitted
withaswitched
Ac power
outsocketforfeeding
other
units
inthesystem.
Quad
power
amplifiers
and
tuners
are
provided
withthe
appropriate
interconnecting
cablesand
thediagram
overleaf
shows
howthe
unitsshould
belinked
together.
lfrequired
aspare
ACoutput
connectoris
provided
which
shouldbe
wiredas
shown
inthediagram
below.
LIVE
= BROWN
ACPower
Output
ConnectorType
CEE22.Part
No
ppR0413
Checking
theAG
Power
Supply
Connecting
tothe
AGPower
Supply
Note
AG
power
Output
page
3

Positioning
the
GontrolUnit
Gonnection
to
the
Amplifier
The34canbe
positioned
free-standing,
panel
mountedorstacked
withother
components.
Never
place
itin
persistent
directsunlightor
nearanyheat
source.
Donotstand
directlyon
topofahigh
power
amplifier,such
asthe
Quad
606,
as
suchamplifiers
can
generate
asubstantialamount
ofheat.
For
panel
mountingthe
panel
should
haveanapertureof
312x56
mmthrough
whichthe34
isfixed.Remove
the34cover
(two
screwsthrough
theback
),
slide
theunitthrough
theaperture
fromthe
frontandreplacethe
cover
frombehind
thepanel.
Refitscrewsinitiallyfingertightthengiveonefurtherhalfturntolock
theunit
firmlyinposition(longer
screwscanbesupplied
onrequest,ifthe
thickness
of
panel
makesthis
necessary).
6617CD PLAYER
AC
power
andsignal
connections
foratypicalQUAD
system
The outputof the 34 control
unit is 500 mV suitable
for all Quadtransistor
amplifiersbut
thiscanbe
changedto
suitdifferentamplifiers
(up
to1.6V
max
-
seechanging output levelchart opposite
forfulldetails).
Phonosockets
are
fitted
andthecable
supplied
withthe
power
amplifiershould
beused.
Makesure
that
theplugs
are
pushed
fullyin,atboth
ends,to ensure
good
connections.
Poorconnection
willcause
hum.
page4

Changing
Output
Level
Signal
Connections
SWITCHINGONANDOFF
Dtsc
RADIO
TAPE
Changing
Output
Level
Chart
To
reducethe
outputconnect
additionalresistors
in
parallel
with
R119|122
as
follows:
470{llor 9dBattenuation
(180
mV)
180Q
for15dB
attenuation
(90mV
)
100Crfor20
dBattenuation
(50
mV)
Toincrease
theoutput
changeresistors
as
follows:
output
(rms) 1V6 1V1 775mY
R118/121 shorted 1kO 1k5O
R119/122 3k3cl 2k2o- 1k5c)
Allinputconnections
areclearlymarked
onthebackofthecontrol
unit.
Phono
socketsareusedfor
all
inputs
andanearth/ground
terminalis
provided
forthe
Discinputifseparate
grounding
isrequired.
The
signalcablefrom
theturntableshouldbe
plugged
intotheDISCLandR
sockets.Thiswillnormallyincorporate
aseparate
earth/groundleadwhichmust
beconnected
totheearth/ground
terminaltoavoidhum
problems.
The34is
suppliedfittedwithadiscinput
modulesuitablefor
most
high
quality
moving
magnetcartridges.Othermodules
areavailablewith
differentinput
impedances
andsensitivitiesformoving
magnetandmoving
coilcartridges.
Contact
your
dealerorQuad directforfurther
details.
The
signalcablefrom
theCD
player
shouldbeconnected
totheGDLandR
sockets.Thenormal
inputsensitivityof
300
mV
issuitableforall
CD
players
but
thiscanbealtered
byreplacingthe
plug-in
'flags'
intoresistor
socketsR135/136.
Flags
forinputsensitivities
of
100
mVand500mV
canbeobtainedeitherfrom
your
dealer
orQuad direct. Thisinputisintended
primarily
forcompactdisc
players
but
canbeusedasanauxiliaryinputfor
aNicam/Satellitereceiveror
similarsource.
ForaQuad FMtuner
orothertunersofasimilaroutput
level.Thetunersignal
cableshouldbeconnected
totheRADLandRsockets.
Thesignal
playback
cableshouldbeconnected
totheREPLandRsocketsand
therecord
cabletotheREGLandRsockets.The
recordandreplaylevelsof
300mV have
beenchosentosuitmostrecorders
currentlyavailableandcan
bealteredbyreplacing
the
plug-in'flags'into
resistorsockets
R135/136
(record)
andR137/138(replay).
Alternativeflagsforsensitivitiesof
l00mVaresupplied.
Toswitchon
press
theon/offbuftononthefront
ofthecontrolunit.Thishas
asequentialactionso
pressing
it
againwillswitchthe
unitoff.
Any
equipment
connectedtotheauxiliaryAC
outletsocketwillalso
beswitchedatthesame
time.
Whenswitchedonthe34automatically
selectsRADIO.
Other
inputs
and
functions
caneasilybe
selectedas
required.
Normallyanyequipment
connectedtotheauxiliaryAC
power
outsocketwould
beleft
switchedonandtheequipmentturned
onandoffusingthe
on/offbutton
on
the34controlunit.
Selecttherequiredinput
sourceby
pressing
theappropriate
selectorbutton.
The
green
LEDnexttothechoseninput
willlighttoshowwhich
sourceis
selected.
CONTROLFUNCTIONS
page5

TAPERECORDERS
MAINTENANGE
Volume
Balance
Mono
BassLifUStep
Filters
Recording
Monitoring
Titt
TurntheVOLUMEcontrolknob
untiltherequiredvolumelevelisobtained.
Eachstepisapprox.4dBat lowlevels
andapprox.2dBathighlevels.
AdjusttheBALANCEleverforcorrectinterchannel
soundbalance.Atthelimits
ofitsexcursionit
provides
LH
or
RH channeloutputonly.
When
MONOisselectedtheLHandRHinputsare
combinedandthebalance
controlactsasamonomixer.Inthecentre
position
thesumofbothinputs
is
fedto bothloudspeakers.As thecontrolis movedto eitherendthemix
progressively
changessoatthelimitsthe
signalfedtotheloudspeakersis
exclusivelyfrom
theLHor
RHinput
only.
Thiscontroloperatesexactlyasitsnameimplies
bytiltingtheaudiofrequency
responseabout
acentre
point.
Thisalterstheoverallsoundbalancewithout
introducingunwanted
colourationby producing a very
gradual
changein
balanceacrossthemusicalspectrumwithout
changingtheoverallsubjective
level.Sixtilt
positions
are
provided,
three
boostingtrebleandcuttingbass,and
threecuttingtreble
andboostingbass
(see
graph).
TheLIFT
positionsprovide
threelevelsof smooth
progressive
boost
for
use
with
small
loudspeakers
oflimited bassresponse.
The
STEP
positions
provide
threelevelsofcutatlowfrequencies
toremove
unwantedlowfrequencyresonance
withoutrollingofftheextremelowerbass.
Extremelyusefulinremovingthecharacteristic'honk'due
toroomacoustics,
particularly
whenloudspeakersare
placed
in
or
near
acorner
(see
graph).
Operatedby threepress buttons
providing
four positions
of cut at high
frequenciestoremoveseverehighfrequency
distortionwithoutaffectingthe
musicalinformation,mainlyusedtoreduce
tracingdistortionfromrecords.
Pressing
eitherF1orF2alonewillselectsingle
pole
filters
operating
from11kHz
and7 kHzrespectively.Adding
theSL buttonconvertsthemto2ndorder
aperiodicfiltersatthesametwofrequencies,increasing
theamountofhigh
frequencyroll-off
(seegraph).
TheredLED'sshowwhichfiltercombinationhas
beenselected,tocanceljust
press
afilterbutton
asecondtime.
Arecorder maybeconnectedtothetape
sockets
forrecordingfrom
any
input
source.
Tomake
arecordingitisonlynecessarytosettherecorder
torecord.
lfnecessary
asecond
recorder
maybeconnectedtotheX1/X2
(unmarked)
socketsforrecordingfromthedisc,radioand
CD
inputs
only
(dubbing
between
tworecordersisnot
possible).
lfrequired
bothrecorderscanbeoperatedatthe
sametime,inrecord
only.
Selectthesourcetoberecorded
(eg
Radio,
CD,etc)whichwillbeheardthrough
the
loudspeakers
aswellasbeingfedtothe
tapeoutsockets.Recordingwill
commenceas soonas therecorderis started. Monitoringis possible
by
pressing
TAPE,
the
green
LEDwill
light.Toreturntolisteningtothesource,
press
TAPEagain,the
green
LEDwillgo
out.
Off
tapemonitoringisautomatically
provided
from
anyinput,whenTAPE
is
selected,
viaathreeheadrecorderconnected
tothetapesockets.
No
routinemaintenanceisrequired.lfnecessary
thecasecanbecleanedwith
asoftbrush
or,
for
morestubbornmarks,aslightly
moistenedlint-freecloth.
In
thiscaseremove
the
mains
plug
fromthesupplysocket.Donotuse
cleaning
agents,solventsorabrasives.
page6

FRONT
VIEW
REAR
VIEW
INPUT/FUNCTION
SELECTORS BASS LIFT/STEP
CONTROL BALANCE
LEVER
VOLUME
CONTROL
POWER
ON/OFF
SWITCH
EARTH/GROUND
TERMINAL
DISCINPUT
MODULE
X1IX2 TAPEREC/REP
SOCKETS SOCKETS
MONO
BUTTON
TAPE
BUTTON FILTER
BUTTONS
ACPOWER
OUT
ACPOWER
IN
POWER
FUSE
63mAanti-surge2OO|240V
100mA
anti-surge
100/130V
AUDIO
OUTPUT
SIGNAL
INPUT
SOCKETS
Connecting
Sockets Signal
lnput:
Disclnput:
Tape:
Xl/X2:
Audio Output:
ACPower
ln:
ACPower
Out:
Audio
inputsfor
radio
andCD
player.
ForM/M
or M/C
cartridges.
Fortape
record
andreplay
connections.
Outputfor
second
recorder
-forrecording
fromdisc,
radio
and
CDinputs.
Audio
outputto
the
power
amplifier.
For
theAC
power
supply
input
cable.
Aswitched
AC
power
outlet
(4A
max)forfeeding
power
toother
unitsin
your
Quad
system.
[uE o o larl
["ol o o larl
Fml
oo@
" ":iE_ ffqJf I'f ll
'\:
,d: li=:*ii *--t
170. -2r. .!_2
E OZm €JMLI R2
lll7_)ll
,** ,c(oc
^(t)^@^
ffivl ,o"c"e
page
7

SPECIFICATION Inputs: Disc*
cD*
Radio
Tape*
Outputs: Amplifief
Tape*
xltx2
Distortion:
ResidualNoise:
Frequency
Response:
InterchannelBalance:
Filterc,BassStep
and
Tilt
(+3
to-3):
Mainsvoltage:
Powerconsumption:
Fuse:
Dimensions:
Weight:
S/N:VolMax. Volat
15
3mV/ 47kctl220
pF 75dB 87dB
300mV/49kO
100
mV/100kO
300mV157ka
87
dB 98dB
88dB 99dB
87
dB 98dB
(Noise
figures'A'weighted
,
dBbelow
500mVoutput)
500mV/830o
(1.6V
max).
300
mV/2k24
(tape
record).
Astape
(from
disc,CDandradioonly).
Worst
case,anyinput0.05%.
'A'weighted.
Volumecontrolat
minimum
-105
dB.
Any
input
(except
Disc)
+6.3
dB,30
Hz-20 kHz.
DiscRIAAflatwithin
10.5
dB.30
Hz
-20kHz.
10.5dBvolumecontrolsettings
max.to
-60
dB.
See
graphs.
110-120Vor220-240V
(changed
by
linksonPCB)
50-60Hz:seerating
plate
on
backofcontrolunit.
7W approx.
63mAanti-surge,
200-240V.
100mAanti-surge,100-130V.
Width321
mm;height64mm;
depth
207mmapprox.
(plus
connectors)
3.2kgapprox.
* Otheroptions
available.
Therightisreseruedtoalter
performance
andspecification
asrequired.
This
equipment
complies
withtheradioinbrterencerequirements
aslaid
down
inEEC
(European
EconomicCommunity
) regulations.
page
8

TiltControl
BassLift/Step
and
Filters
+3
+2
+l
0dB
-t
2
3
40 Hz 100Hz
Quad
accessoriesare
oesignedtomatch
Quad
equipmentand
to
provide
thebest
possibleperformance.
Pleasecontact
your
dealer
or Quad
direct
forfurtherrnformation
l0 kHz 2A kHz
ACCESSORIES
Item
DiscmoduleM/M
1mV47k!).1220
pF
(3L)
DiscmoduieM/M3mV47kjl220 pF(3M).
Discmodule
M/M10rnV47kL)122-0
pF(3H)
Discmodule
M/C
'10C
mV100tt122nF
(38)
Disc
moduleM/C200mY100!t122
nF
(3A)
DiscmoduieMIC400
mY1001).122nF
(3C)
Quadrack
FM41341306
Quadoedestal
DoublesleeveforFM4/34
(grey)
19"
rackrnounting
panel
for
34/FM4/306
(grey)
Signallead
Phono
(0
5m)
Signallead
Phono
(1m)
ACinte;connectsupply
leadEuro/Euro
(0
45m)
AC
interconnectsupplyleadEuro/Euro
('1m)
AC
supply
ieadEuro/freeend
(2m)
ACEurooutputconnector
OrderNo
Q34DMLG
Q34DMMG
Q34DMHG
Q34DMBG
Q34DMAG
Q34DMCG
QRACKC3
QPEDASG
QTUCOVG
M203414
QP2P2SA
QP2P21A
QSPESSB
QSPESl
B
QESOE2A
PPRO41
3
* Suppliiedasstandard

%
aLrA
Quad
Electroacoustics
Ltd Huntingdon
PE187DBUntted
Kingdom
Telephone:0480
52561 Fax0480
413403
QUAD
isa registeredfrade
Mark
D