INSTALLING THE GFA-555ms

 

The GFA555ms is equipped with largeheatsinks to d

issipate the heat generatedbythe

outputpowertransistors.Althoughduringnormalho

meoperationtheheatsinkswillbecome

justwarmtothetouch,thereareinstancesduring

highlevelplaybackintolowimpedance

speakerswhichwillcausetheheatsinkstobecomem

uchwarmerthannormal. Therefore,

adequate air circulation MUST be made available to ensure proper heat dissipation

from the heatsinks.Youwillensuretheamplifier'slongterm,trouble

freeoperationifyou

keepitawayfromexternalsourcesofheat,suchas

radiators,hotairductsorintensedirect

sunlight,andprovidereasonableventilation.TheG

FA555msshouldneverbeplacedwith

otherheatproducingcomponentsinacabinetorenc

losurelackingfreeairflow.Youshould

alsoprovideadequatespacearoundtheamplifierto

insuregoodaircirculation.

Thetop,bottomandsidepanelsoftheamplifier ha

vebeenprovidedwithslots toallow

necessarycoolingoftheinternalcomponentsofthe

amplifier. This GFA-555ms Required

Four Inches of Clearance on the Top and All Sides. Youshouldensurethattheseslots arenotobstructedinanyway.

Weadvisethatyourefrainfromstackingothercomp onentsontopoftheGFA555ms.Not onlywilltheheatgeneratedbytheamplifieraffec ttheperformanceofequipmentstackedon

topoftheGFA555ms,butthefreeflowofairthro ughtheventilatingslotsprovidedinthe chassisoftheamplifiermaybepartiallyobstructe d.IfyourequirethattheGFA555msbe mountedinanenclosedcabinet,itisrecommendedt hattherearpanelofthecabinetbe

providedwithventsorslotsatthebottomandtop toallowairtocirculatefreelythroughthe cabinet.

Ifyouobservetheserecommendations,theGFA555ms

willperformquitereliablyinany

reasonableenvironment.Youshouldalsopayattenti

ontosuchroutineconsiderationsas

protectionfromexcessivedustandmoisture.Occasi

 

onalvacuumingofaccumulatedduston

thesurfacesofthechassis,panelsandheatsinkss

 

houldbeallthatisrequired.

Foruseinprofessionalinstallations,theGFA555m

 

smaybemountedinastandard19inch

rackusingtheoptionalRM7rackmountadaptorsav

 

ailablethroughADCOMdealers.Ifthe

GFA555ms is to be mounted on a rack, along with ot

her components which are

interconnected to the GFA555ms, the amplifier's ch

assis must be insulated from the

metalrackrailstopreventgroundloops,especiall

yiftherackisgroundedto"earth",andto

avoiddefeatingtheaudiogroundingschemeofthep

 

oweramplifier(theaudioinputgrounds

are isolated from and above the chassis ground). Pl

 

ease consult the instruction sheet

Page 5
Image 5
Adcom GFA-555MS manual

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.