McIntosh C-8S User manual
INSTALLATIONforC-8S
TheC-8SProfessionalAudioCompensatorwithStereoControlisa
completeC-8Compensatorwiththeadditionofa "STEREOMODESELECTOR
SWITCH,""STEREOBALANCE"andgangeddual"VOLUMECONTROLS".
ShippedwiththeC8saretwo6 footshieldedleadsandone3 footshield-
edlead.Thesewillbeusedininterconnectingthesystem.
TointerconnecttheC-8andC-8Sformonaural-stereoreproduction,
completethefollowingprocedure.UsetheC-8fortheleftchannel
andtheC-8Sfortherightchannel.
TheC-8Isfirstmodifiedasfollows:
1.)Theheavyinter-unitcableconnectingtheC-8tothepower
amplifierIsdisconnectedattheamplifierend.
2.)Witha pairofcuttingpliers,removepin#2fromtheoctalplug
oftheinter-unitcable.Ina monauralsystempin#2carriesthesignal
fromthepreamplifiertothepoweramplifier.Ina stereosystemthe
signalmustbeobtainedfromthemainoutputjackonthebackofC-8.
3.)Afterremovingpin#2theinter-unitcableIsreconnectedtothe
poweramplifier.
4.)OnC-8'swithserial#10600andabovetheinputmarked"MIC"can
besimplyconvertedtopreamplificationandequalizationfortapeheads
bycuttingonewireontheinputselectorswitch,(seefigureB.)
Onserialnumbersbelow10600theconversionmustbedoneatthefactory
Thecostoffactoryconversionis$5.00.Tapeheadscan,ofcourse,
beusedin"PHONO#1"onallC-8compensatorswithoutanyconversion.
Forpropertapeheadconnectionseethetopparagraphonpage4 ofthe
C-8Instructionmanual.
(A.)
Nowconnecttheprogramsourcesinthefollowingfashion:
1.)Plugoneendofthe3 footshieldedleadintothejackmarked
"MAINOUTPUT"locatedonthebackpaneloftheC-8.
2.)TheC-8"VOLUME"controlonthefrontpanelisturnedfully
clockwise.ThechangesinvolumewillbecontrolledbytheC-8Sganged
"VOLUME"control.
3.)Inserttheleftchannelphonocartridgeleadin"PHONO#2"onthe
C-8.
4.)Ifa tapedeckisusedforstereoplayback,insertleftchannel
leadinto"MIC"inputoftheC-8,serial#10600andabove,afterconver-
sionasinsectionA,step#4above.Thisinputisterminatedat100,000
ohms.N.A.R.B.tapeplaybackequalizationisachievedbydepressingthe
BassCompensationswitchlabeled"950",adjustingthe"BASS"tonecontrol
to- 1,andadjustingthe"TREBLE"tonecontrolto-2.5.
Ifa stereotapeplaybackwithpreamplifiersisused,insertthe
leftoutputinthechannelmarked"TAPE".
NextinterconnecttheC-8S:
1.)Plugtheheavyinter-unitcablefromtheC-8Sintheoctalsocket
marked"Pre-Amp"ontherightpoweramplifier.
2.)Thelooseendofthe3'shieldedlead(sectionB,step#1)from
theC-8"MAINOUTPUT"ispluggedintothe"LEFTSTEREOIN"ontheC-8S.
3.)Interconnectbymeansofoneofthe6'shieldedcablesbetween
thejackmarked"LEFTSTEREOOUT"ontheC-8Sandthe"0.5VOLT"input
oftheleftpoweramplifier.
4.)Interconnectbymeansoftheotherofthe6'shieldedcablesbetween
the"MAINOUTPUT"ontheC-8Sandthe"0.5VOLT"inputontheright
poweramplifier.
5.)PlugtheA.C.cordfromtheC-8intooneoftheauxiliaryA.C.
receptaclesontheC-8S.
6.)TheA.C.cordsfrombothpoweramplifierscannow"bepluggedinto
theauxiliaryA.C.plugsontheirrespectivepreamplifiers.Theon-off
switchonthevolumecontroloftheC-8Snowcontrolsturningonthe
entiresystem.
(c.)
(B.)
-2-
ConnecttheprogramsourceequipmenttotheC-8Sasfollows:
1.)PlugtherightchannelphonocartridgeleadintotheC-8Sinput
marked"PHONO#2".
2.)Connecttheoutputoftherightchanneltapeheadtotheinput
marked"TAPEHEAD".ForN.A.R.B.equalizationfroma tapehead,depress
thebasscompensationswitchlabeled"950",adjust"BASS"tonecontrol
to- 1,and"TREBLE"tonecontrolto- 2.5.
3.)Ifa taperecordedwithpreamplifiersisused,plugtheoutputof
therightchannelintotheinputmarked"TAPE".
4.)Ifa monauralcartridgeisused,plugitinto"PHONO#1".
5.)Connecta tuneroutputtoinputmarked"TUNER",
Thebalanceofthestereosystemwillbemaintainedinallmodesof
operationbyfollowingthesesystembalancinginstructions:
1.)Turninputselectorswitchesonbothpreamplifiersto"PHONO#2".
2.)Turnthestereo"MODE"selectorswitchto"MONRIGHT".
3.)Adjustthe"BALANCE,""BASS,"and"TREBLE"controlsto12o'clock.
4.)AdjusttheRECORDCOMPENSATOR"toRIAAsettings.
5.)Adjustthe"INPUTLEVELCONTROL"onbothcompensator"PHONO#2"
channelstotallyclockwise.A monauralrecordisusedforcorrectly
balancingthesystem.TurnupthevolumecontrolontheC-8S.Withthe
modeselectorswitchin"MONRIGHT"thesamesignalwillbeheardfrom
bothloudspeakers.
6.)Ifthesoundfromeachloudspeakerisnotofequalloudnessadjust
thecontrolmarked"GAIN"ononepoweramplifieruntilthesoundsfrom
theloudspeakersareofequalintensity.DonotusetheBalanceControl
forthisadjustment.
-3-
(E.)
(D.)
-4 -
7.)Withthemonauralrecordplaying,standona lineapproximately10
feetinfrontofandmidwaybetweentheloudspeakers.Themainsourceof
soundshouldappeartobedirectlyinfrontofyou.Ifthemusicsounds
aredividedtheloudspeakersareoutofphase.Correctthisbyreversing
theloudspeakerleadsononeloudspeakeronly.Thepoweramplifiersnow
areinphaseandbalanced.Donotchangethe"GAIN"controlonthe
poweramplifiersinanyofthefollowingsteps.
8.)Nextbalanceforequaltonequalityoneachsidebymovingthe
"MODE"switchbetween"STEREOLEFT"and"RIGHT".Comparethehigh
frequencyresponseoneachloudspeakerfirst.Adjustthe"TREBLE"'
tonecontrolononesideonlyuntilthesurfacenoisefromtherecord
oneachsideisofequalintensity.
9.)Nextmakea carefulcomparisonoflowfrequencyresponse.While
switchingbetween"STEREOLEFT"and"RIGHT11adjustthe"BASS"tone
controlononecompensatoruntilthebassoutputisequalfromboth
speakers.
10.)Removethemonauralrecord.Nextplaya stereorecord.Turnthe
C-8Svolumecontroluptoroomvolumeandadjustthe"BALANCE"control
forbalancedstereoresults.Thebalancecontrolisdesignedtoadjust
forunequalprogramsources,andmaintainbalanceofthesystemwhen
switchingbetween"STEREONORM"and"REV".
InstallationPrecautions:
Cautionmustbeexercisedintheinstallationtokeepthegroundleadfrom
eachchannelofthestereocartridgeorstereotapeheadsseparatetoprevent
groundloopsandhum.
Table of contents
Other McIntosh Amplifier manuals
McIntosh
McIntosh MHA200 User manual
McIntosh
McIntosh C32 User manual
McIntosh
McIntosh MA 230 - SERVICS BULLETINS User manual
McIntosh
McIntosh MC601 User manual
McIntosh
McIntosh MA 5100 Operating and installation instructions
McIntosh
McIntosh MA6100 B Reference manual
McIntosh
McIntosh D150 User manual
McIntosh
McIntosh MC451 User manual
McIntosh
McIntosh C2700 Instruction manual
McIntosh
McIntosh MA7000 User manual
McIntosh
McIntosh MC225 User manual
McIntosh
McIntosh C2200 User manual
McIntosh
McIntosh 50W2 - B User manual
McIntosh
McIntosh MC402 User manual
McIntosh
McIntosh MA6700 User manual
McIntosh
McIntosh MC206 User manual
McIntosh
McIntosh MC352 User manual
McIntosh
McIntosh MC2000 User manual
McIntosh
McIntosh MX 115 Operating and installation instructions
McIntosh
McIntosh C46 User manual
