accommodateeitherbare wire,tinnedwire,terminal

pins,spadelugs,or"bananaplugs",

both single and dual. The output terminals are colo

rcoded RED and BLACK to indicate

polarity. To insure correct stereo phasing, you mus

t connect the RED output terminal

(labeled"+")totheloudspeakerinputterminalcol orcodedRED(orlabeledPOSITIVE,"+",

POS,8OHMSor4OHMS).TheBLACKbindingposttermin

alontheamplifier(labeled"")

should be connected to the BLACK loudspeaker termin

al (or labeled NEG, "", C, COM,

COMMON,G,orGROUND).

 

NOTE

TheGFA555msispolaritycorrect;thatis,itdoes notinvert"phase".Anypositivegoing signalatitsinputswillappearasapositivegoin gsignalatitsoutputs.

TheRIGHTSTEREOOUTPUTshouldbeconnectedtothe

rightchannelloudspeaker,as

you facethepairofloudspeakers,andtheLEFT STE

REO OUTPUT to the leftchannel

loudspeaker.

 

Be certain, when the GFA-555ms is used in Its stereophonic mode, the STEREO/BRIDGED MONO INPUT switch is in the STEREO position. Otherwise, the

amplifierwillnotoperateinthestereomode.You

willamplifyonlythe leftchannelthrough

both outputs of the amplifier. For further clarific

 

ation, please refer to the section

STEREO/BRIDGEDMONOINPUT/OUTPUT.

 

 

Inordertoinsurethatconnectionstotheloudspea

 

kersarecorrect,youmustbeableto

identifyeachwireconductoroftheloudspeakercab

 

lesatbothendsofthecables.Thisis

relatively easy to do since most loudspeaker cables

consist of two parallel, stranded

conductorsinaflexibleinsulation,withacoding

systemforwireidentification.Sometimes

thereisacolored"tracer"wrappedaroundoneoft

heconductors;somecordshaveoneof

theconductorscoloredsilverandtheothercopper;

 

somehavea"ridge" moldedonthe

insulationononeoftheconductors,whileothersa

 

remarkedwitha"+"and/or"_". Your

ADCOMdealeralsosellsspecialloudspeakerinterco

nnectingcablesandthesearemost

oftenlabeledwithrespecttopolarity.

 

 

Generallyspeaking,whenmakingconnectionstothe loudspeakersfromtheamplifier,itis

veryimportanttousethecorrecttypeandsizeof wireinordertoavoidunnecessarylossof amplifier power in the cable, reduction of amplifie r damping factor (DF) and other undesirableconditions.Forrunsupto12feet,ord inary"zip"orlampcord,madeofAWG18 strandedwireandavailableinavarietyofinsulat ioncolorsmaybeused.Forrunsupto40 feet,AWG16strandedwireshouldbeusedtoprevent powerlosses.Forlengthsover40feet

Page 7
Image 7
Adcom GFA-555MS manual Stereo/Bridgedmonoinput/Output

GFA-555MS specifications

The Adcom GFA-555MS is a high-performance power amplifier that has established a reputation for its reliability and excellent sound quality. This amplifier, developed by Adcom, an American audio company known for producing high-quality audio components, is often sought after by audiophiles and professionals alike for its unique features and robust build.

One of the standout characteristics of the GFA-555MS is its impressive power output. With a continuous power rating of 200 watts per channel into 8 ohms, and even more when driving lower impedances, it provides ample power to drive a wide variety of speakers. This ensures that users can enjoy dynamic sound reproduction, whether they are listening to music at moderate volumes or cranking it up for a party.

The GFA-555MS is designed using a high-current, Class AB topology, which strikes a balance between efficiency and sound fidelity. This design allows for clean, detailed audio reproduction while minimizing distortion. The amplifier is renowned for its ability to handle complex musical passages and reproduce them faithfully, making it a favorite among music lovers who appreciate the nuances of their favorite recordings.

Another notable feature is its advanced thermal management system. The GFA-555MS is equipped with substantial heat sinks and a robust power supply that allows it to operate efficiently without overheating. This is particularly beneficial for sustained listening sessions or when driving demanding speaker loads.

In terms of connectivity, the GFA-555MS offers various input options, including RCA and XLR connections, making it versatile enough to integrate into a range of audio systems. This flexibility is complemented by its exceptional build quality, with a solid chassis that not only enhances durability but also minimizes vibrations that could interfere with sound quality.

The amplifier also includes additional features such as DC protection circuitry and a comprehensive output stage protection system. These safeguards help protect both the amplifier and the connected speakers from potential damage due to short circuits or overheating.

Overall, the Adcom GFA-555MS stands out in the realm of audio amplifiers. Its combination of power, sound quality, and advanced technologies make it a preferred choice for both casual listeners and serious audiophiles. Whether for home theater setups or music playback, the GFA-555MS delivers performance that is hard to match, making it a true classic in the audio world.