CONNECTING THE GFA-555ms, Right/Left Input, Workwell

packedwiththeoptionalrackmountadaptorsformo reinformation.

CONNECTING THE GFA-555ms

TheoptimalperformanceoftheGFA555mswillultim atelydependonthecarewithwhich youperformtheconnectionstotheamplifier,thep reamplifierandtheloudspeakers.Allthe inputandoutputsignalconnectionsshouldbemade onlywithhighquality,lowlosscables followingtherecommendationsmadeintheindividua lsectionsbelow.Pleaserefertothe rearpaneldiagramtoidentifyalltheconnections andtheirlocations.

NOTE

WHENEVER CONNECTIONS TO OR FROM THE GFA-555ms ARE BEING MADE, BE CERTAIN THAT THE POWER SWITCH ON THE AMPLIFIER IS IN ITS OFF POSITION, THE AC LINE CORD OF THE AMPLIFIER IS DISCONNECTED FROM THE AC WALL OUTLET AND THAT ALL ASSOCIATED COMPONENTS ARE TURNED OFF.

RIGHT/LEFT INPUT
TheaudioinputstotheGFA555msarethroughtwoh			ighquality,goldplatedbrassRCA
jacksusingTefloninsulationtominimizehighfreq	uencylosses,noise,etc.Theywillaccept
standardRCAtypeplugs,oneforeachchannel,LEFT			andRIGHT,usuallysuppliedatthe
ends of interconnecting cables. To insure that the			performance designed into the
GFA555msispreserved,youshouldusethehighest		qualityplugsandcableasarefeasible.
There are many cables which are designed specifical			ly for these applications and your
ADCOMdealercanbeofhelpinselectingthebestc			ableforyourapplication.Whatever
cableyoufinallyselect,itshouldhavelowcapaci	tance.Thisisparticularlyimportantifyou
usealongrunbetweenthepreamplifierandtheamp		lifierorifyourpreamplifierhasahigh
outputimpedance. Generallyspeaking,acablewith			acapacitanceofaround100pF will
workwell.
The load impedance which the GFA555ms inputs prese			nt to the source preamplifier is
100,000ohms. Thisloadimpedanceresultsinminima			lamplifier noiseandis morethan
adequateforusewithanyassociatedsourcecompone			ntregardlessofitsoutputimpedance.
Topreservethecorrectstereophoniceffects,pleas	ebecertaintoconnecttheleftoutputof
the preamplifier to the RCA jackonthe GFA555ms l			abeledLEFT INPUTand theright
outputofthepreamplifiersectiontotheRCAjack	labeledRIGHTINPUT.
RIGHT/LEFT STEREEO SPEAKER OUTPUTS
TheGFA555ms'sconnectionstotheloudspeakersare			madethroughhighgrade5way,
goldplated brass bindingpost terminals located on		the rear panel. These terminals will

Adcom GFA-555MS manual CONNECTING THE GFA-555ms, Right/Left Input, ighquality,goldplatedbrassRCA

Models: GFA-555MS

CONNECTING THE GFA-555ms

RIGHT/LEFT INPUT

TheaudioinputstotheGFA555msarethroughtwoh

ighquality,goldplatedbrassRCA

jacksusingTefloninsulationtominimizehighfreq

uencylosses,noise,etc.Theywillaccept

standardRCAtypeplugs,oneforeachchannel,LEFT

andRIGHT,usuallysuppliedatthe

performance designed into the

GFA555msispreserved,youshouldusethehighest

qualityplugsandcableasarefeasible.

ly for these applications and your

ADCOMdealercanbeofhelpinselectingthebestc

ableforyourapplication.Whatever

cableyoufinallyselect,itshouldhavelowcapaci

tance.Thisisparticularlyimportantifyou

usealongrunbetweenthepreamplifierandtheamp

lifierorifyourpreamplifierhasahigh

outputimpedance. Generallyspeaking,acablewith

acapacitanceofaround100pF will

workwell.

nt to the source preamplifier is

100,000ohms. Thisloadimpedanceresultsinminima

lamplifier noiseandis morethan

adequateforusewithanyassociatedsourcecompone

ntregardlessofitsoutputimpedance.

Topreservethecorrectstereophoniceffects,pleas

ebecertaintoconnecttheleftoutputof

the preamplifier to the RCA jackonthe GFA555ms l

abeledLEFT INPUTand theright

outputofthepreamplifiersectiontotheRCAjack

labeledRIGHTINPUT.

RIGHT/LEFT STEREEO SPEAKER OUTPUTS

TheGFA555ms'sconnectionstotheloudspeakersare

madethroughhighgrade5way,

goldplated brass bindingpost terminals located on

the rear panel. These terminals will