Adcom GFA-555, Руководство пользователя

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due t o th e h ig h power su rg e e m itte d from th e a m p lif ie r .
XL i s e s s e n t i a l to f o ll o w th e procedure o f c o m p le te ly hooking up your system
b e fo r e tu rn in g a n y th in g on! A few sim p le p r e c a u tio n s w i l l c o n tr ib u te to tr o u b le
f r e e pcrfortn an ce. Because o f th e h ig h power o f th e GFA-555, ADCOM w i l l not be
r e s p o n s ib le f o r any damage t o s p e a k e r s or o th e r com ponents due to t h e ir
inability
t o h an d le th e a m p l i f i e r ' s power o u tp u t or fo r any o th e r m is u s e .
SECTION 5
WHY WE BUILT IT THE WAY WE DID
The ADCOM GFA-555 r e p r e s e n t s a d ep a rtu re from many o f th e o th e r c u r r e n tly
a v a il a b l e a m p lif ie r d e s i g n s , T h is d ep a rtu re i s th e r e s u l t o f c a r e f u l stud y o f a l l
known a m p lif ie r te c h n o lo g y , c i r c u i t s and p a r t s . The major f e a t u r e o f th e GFA-555
i s i t s o u tsta n d in g a b i l i t y to d r iv e v i r t u a l l y any sp e a k e r , r e g a r d le s s o f im pedance,
t o h igh sound l e v e l s w h ile m a in ta in in g th e s o n ic i n t e g r i t y o f th e m u sic. By u s in g
a 700 w a tt tra n sform er a lo n g w ith 6 0 ,0 0 0 m icro fa ra d s o f f i l t e r c a p a c ita n c e , the
GFA-555 can p r o v id e co n tin u o u s power, n o t o n ly momentary power fo r demanding
m u sic a l t r a n s i e n t s . A ls o t o n t r ib u t in g to th e o u tsta n d in g perform ance i s th e u se
o f 16 h ig h -c u r r e n t o u tp u t t r a n s i s t o r s a lo n g w ith p r e c i s i o n p a r t s s e l e c t i o n o f th e
components u sed in a l l a u d io c i r c u i t s ,
The In sta n ta n e o u s D i s t o r t i o n A le r t c i r c u i t i s a unique d i s t o r t i o n d e t e c t io n
c i r c u i t which rea d s a l l form s o f d i s t o r t i o n — THD» IM, sle w in d u ced , and DC o f f s e t .
Peak LEDs, one p er ch a n n elj w i l l glow when d i s t o r t i o n i s over 13 r e g a r d le s s o f
th e load im pedance or r e a c t a n c e . In u s e , the LED can o c c a s io n a lly f l i c k e r under
h igh volume l i s t e n i n g . I f th e y §low b r ig h t ly or a r e on most <?f th e tim e th a t you
are l i s t e n i n g , you a r e o v e r d r iv in g your equipment and sh ou ld turn down your volume
c o n t r o l.
We c o n s id e r the GFA-555 a t r u ly s i g n i f i c a n t c o n t r ib u t io n t o th e advancement
of sound te c h n o lo g y . To en su r e t h a t th e q u a lit y of c o n s t r u c t io n i s on par w ith th e
q u a lit y o f s o n i c s , (a much n e g le c t e d a rea in many o th e r a m p lif ie r s ) the GFA-555 has
been c a r e f u l ly d ev elo p ed w ith com puter c o n t r o lle d m eta l f a b r ic a t io n te c h n iq u e s thac
m a in ta in ,005 o f an in ch t o le r a n c e th ro u g h o u t. F u ll e l e c t r i c a l in s p e c t io n o ! each