Adcom GFA-555 User Manual

ADCOM

P C W E R 4 M P

G F k - 5 5 5

ADCOM GFA-555 OWNERS MANUAL

WELCOME

I t

ia

very

im portant

chat

you

thoroughly

read

t h is

owners manual

b efo te

turning your

ADCOM

GFA-555 power a m p lifier

on.

(For

those

In

a

hurry*

p lea se

read

S ectio n s

1 -5 ).

Your ADCOM GFA-555

rep resen ts

the

most advanced

th inking

In

audio

a m p lifier

d e sig n .

At

200

w acte

per

channel, the GFA-555

o ffe r s

an

excep tion al

valu e;

su perior

performance

a t

a

reasonable

p r ic e .

Some o f

th e

outstanding

fe a tu res of

th is

product

are:

-

200

w atts

per

channel*

20UZ-20KU2 *

in to

an

8

ohm load

w ith

both

channels

driven

w ith

le s s

than

0.09%

t o t a l harmonic

d is to r tio n .

-

325

w atts

per

channel,

20Ha-20KHz,

in to

a

A ohm load

w ith

both

channels

driven

with

le s s

than

0.25%

to ta l harmonic

d is to r tio n .

-

The

a b ilit y

to

d rive

very

low

impedance

lo a d s.

-

Bridged

mode

power

of

600

w a tts, 20Hz~20KH2,

in to

art

8 ohm load

with

le s s

than

0.25!? to ta l

harmonic

d is to r tio n .

-

Instantaneous

D isto rtio n

A lert

which

in d ic a te s

whenever

d isto r tio n products

are above

the

1 %

le v e l.

This manual

has

been

w ritten

to

a n tic ip a te

the

kinds

of

q u estion s

you

might

encounter

w h ile

enjoying

the

f u l l

b e n e fits

o f

your

ADCOM

GFA-555

power

a m p lifie r .

P lea se

read

i t

thoroughly

to

fu lly

understand a l l

the

fea tu res

offered

and how they

can

be

used

to

maximize

the

performance

o f

your audio

system*

SECTION 1

WHAT TO DO WHEN YOU OPEN THE BOX

B efore each GFA-555

l e f t

the

fa cto ry ,

i t was

c a r e fu lly

Inspected

for

p h y sica l im p erfection s

as

a

rou tin e

part

o f

ADCOM's

system atic q u a lity

co n tro l.

T h is,

along

w ith f u ll

e le c tr 'ic a l

te s tin g ,

should

insure a

product fla w le ss in

both appearance

and

perform ance.

A fter you

have

unpacked

the

a m p lifie r ,

in sp ect

i t

for

any

p h y sica l

damage.

Save

the

sh ipping carton and

a l l

packing

m aterials

as

they are

e s s e n tia l

to

reduce

to

a minimum the

p o s s ib ilit y

o f

tran sportation

damage

3hould the product

ever

need

to

be

shipped again .

In

the

u n lik ely

event

th at damage has

occurred,

n o tify

your

d ea ler

im m ediately

and

request

the

name

of

the

ca rr ier

so that

a w ritten

claim

to

cover

shipping

damages

can

be

in itia te d .

THE RIGHT ID ANY CLAIM AGAINST A PUBLIC CARRIER GAB BE FORFEITED IF THE CARRIER IS NOT NOTIFIED FRQMPTLY AND IF THE SHIPPING CARTON AND PACKING MATERIAL ARE NOT AVAILABLE FOR INSPECTION. SAVE ALL PACKING MATERIALS UNTIL THE CLAIM HAS BEEN SETTLED.

SECTION 2

WHERE TO PUT IT (AWD WHERE NOT TOt)

The

GFA-555 u t i l i z e s

la r g e

ex ter n a l

h eat

sin k s

to

d is s ip a te heat

from

the

power

tr a n s is to r s .

The

top

and

bottom

panels

o f

the

a m p lifier have

s lo t s

to

allow

a ir

to

c ir c u la te

in a id e

the

a m p lified ,

Adequate

a ir

c ir c u la tio n

must be

a v a ila b le

to

assu re

cool

operation

o f

the

amp.

T herefore,

the

GFA-555

should

not

be

com plete

enclosed

with

other

heat

producing components,

and

adequate

space around

the

amp­

l i f i e r

should

be

m aintained.

We recommend

a t

le a s t

3

inches

on

the

top

and

I

inch

on

the

sid e s

and

rear for

a ir

c ir c u la tio n .

I f

the

GFA-555

i s

going

co

be

mounted

in

an

enclosed

ca b in et,

i t

is

recommended

th at

the

back

o f

the cab in et

have

ven ts

to

allow

a ir

to

c ir c u la te

around

the a m p lifie r .

With

th ese

con sid eration s

in

mind,

the GFA-555 should perform

q u ite

hap pily

in arty

reasonable

environm ent.

Of

course,

such normal co n sid era tio n s

as

p ro tectio n

from

e x ce ssiv e

dust

and

m oisture

should

always

be

observed.

The

ADCOM GFA-555

power a m p lifier

has

been

c a r e fu lly

designed