INPUT
STEREOORTWINAMPLIFIEROPERATION
Useshieldedcablestoconnectthesignalfromthepre-
amplifierorsignalsourcetothepoweramplifierinput.To
minimizethepossibilityofhumtheshieldedcablesshould
berunparalleltoeachotherorlooselytwistedtogether.
LocatethecablesawayfromspeakerleadsandACpower
cords.Allconnectionsaremadeonthebackpanelofthe
MC2200.
Forstereooperation,theleftoutputofthepreamplifier
shouldbepluggedintotheLeftinputjackofthepower
amplifier.Therightoutputofthepreamplifiershouldbe
pluggedintotheRight(MONO)inputjackofthepower
amplifier.
Fortwinamplifieroperationa separatesignalsourcecan
beconnectedtoeachinput.Instereoortwinamplifier
operationtheMODESWITCHmustbeintheSTEREOposi-
tion.
MONOPHONICORSINGLECHANNELOPERATION
Ashieldedcablefromthesignalsourceispluggedinto
theRight(MONO)inputjackoftheMC2200only.The
MODESWITCHonthebackpaneloftheamplifiermustbe
placedintheMONOposition.IntheMONOpositionthe
rightchannelinputjackconnectstobothleftandright
poweramplifiers.Monooutputisobtainedbystrapping
bothoutputsinparallel.TheLeftINPUTisdisconnected.
OnlythesignalfedintotheRight(MONO)inputwillbe
amplified.
ShouldtheMODESWITCHbeleftintheSTEREOposition
andtheoutputtransformersremainstrappedfora mono-
phonicload,onechannelwillattempttodrivetheother
whichcauseshighcirculatingcurrentsandoverheating.Be
certainthattheMC2200isneveroperatedinthestereo
modewiththeoutputsconnectedformonophonicopera-
tion.
OUTPUT
BecertaintheloudspeakersconnectedtotheMC2200
arecapableofhandlingthepoweroutputoftheampli-
fier.
Formultiplespeakeroperation,runseparateleadsfrom
eachspeakertotheamplifier.Becauseofthehighpower
availablefromtheMC2200,largediameterspeakerleads
mustbeused.Uselampcord,bellwire,orwirewithsimilar
typeofinsulationtoconnectthespeakerstotheamplifier.
Inallcases,theleadstoandfromthespeakershouldbe
twinconductorortwistedtogether.Whenusing8 ohm
speakersandforthenormallyshortdistancesofunder30
feetbetweentheamplifierandspeaker,#18wireor
largercanbeused.Fordistancesover30feetbetweenthe
amplifierandspeakeruselargerdiameterwire.Selectthe
correctsizewireforthewiredistancefromthechart.Itis
recommendedthattheDCresistanceofthespeakerleads
belessthan5%ofthespeakerimpedance.Upto10%can
betolerated.Resistanceoftheleadsshouldbecomputedfor
thelengthofwirebothtoandfromthespeakerorspeakers.
Wire
Gauge
22
20
18
16
14
12
10
MAXIMUMWIRE
For4 OhmLoad
Feet
6
10
15
25
40
60
100
Meters
1.83
3.05
4.57
7.62
12.19
18.29
30.48
LENGTHS
For8
Feet
12
20
30
50
80
120
200
OhmLoad
Meters
3.66
6.10
9.14
15.24
24.38
36.58
60.96
Wirelengthsaboverepresentthewireresistanceequalto
5%ofthespeakersimpedance.Useofsmallerwiresizes
willproducemoreresistancewhichcausesmorepower
lossandlessloudspeakerdamping.
STEREOORTWINAMPLIFIEROPERATION
Checktheimpedanceofthespeakerwhichisusually
identifiedonthespeakeritselforinthespeakerowner's
manual.Connecta leadfromthecommonterminalofthe
leftspeakertotheamplifierLEFTOUTPUTterminalstrip
COMmonscrew.Connectanotherleadfromtheothertermi-
naloftheleftspeakertothescrewwiththenumber cor-
respondingtothespeakerimpedanceontheLEFTOUTPUT
terminalstrip.Therightchannelspeakerisconnectedin
thesamemanner ontheRIGHTOUTPUTterminalstrip.For
stereoortwinchanneloperationitisnotnecessarytouse
thesameimpedanceloudspeakeroneachoutput.Connect
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