DEAR
CUSTOMER,
thank
you for
the
trust
you have shown
in
us with
the
purchase
of
this integrated amplifier Evolution A2.You
have acquired a versatile
hi-fi
component
with absolutely excellent
sound
qualities.
It
is
understandable
that
you would like
to
immediately
start
listening
to
the
music. Despite this
we
advise
you
to
show
some
patience; you
will
find
that
this
will
stand you
in
good
stead.
Before you take this
equipment
into use for
the
first time you should thoroughly read this operating manu-
al.
It
will
ensure
that
the
equipment
can be optimally used
to
give you a
great
deal
of
untroubled pleasure.
We
have made every
effort
to
include
in
this manual
all
the
necessary information for providing assistance
to
operate
the
equipment. Please
contact
us
in
writing
or
by
telephone
if
you have
further
questions,
if
the
answers are
not
to
be found here.
We
will
make every effort
to
provide you with assistance.
YOUR
A
V'A
TEAM
Certificate
of
Conformity
We
confirm
that
the
equipment
described
in
these
operating instructions conforms
to
the
EU
regulations
applicable
at
the
time
of
print permitting it
to
bear
the
sign
CE:
All
relevant
tests
achieved positive results.
18
THE
CONCEPT
OF
THE
EVOLUTION
A2
We
have put great
store
during
the
development oftheAYM-high-end
components
to
produce
interference-
free and precise musical
reproduction.At
the
same
time
we
want
to
offer you a clear and lucid design which
will
result
in
Simple and comfortable
operation.
We
have found
that
conventional solutions are
not
always
adequate
to
achieve
these
aims
without
making compromises.
We
have
not
deviated from
the
norm
just for
the
sake
of
it,AYM
is
looking
to
explicitly serve
the
optimization of tonal quality and
user
friendliness
of
our
components.
THE
MECHANICAL
CONSTRUCTION
The
casing of
the
A2
consists for
the
greater
part
of magnetically shielding steel plate - this dependably
stops
outside
interference.
The
built
in
power
transformers
are
by
nature
of
the
low scattering toroidal type.
All
in- and
output
sockets of
the
A2 have plated
contact
areas for durability and improved contact. Epoxy resin
circuit boards with double thickness
copper
layer coupled with
the
use
of
brand named, selected quality
components
ensure
that
you
will
have long
term
enjoyment
with
your
AYM
integrated amplifier.
THE
POWER
SUPPLY
Two
separate
power
supplies, each with
their
own toroidal
transformers,
supply
the
A2
output
stages (dual-
mono-construction).
The
filter capacitance totals
over
80.000~F,
the
available
transformer
power
340
YA,
whereby
over
the
short-time, peaks
up
to
I.OOOYA
are
available.At critical points
the
power
supply
is
addi-
tionally
supported
by
HF-suitable
film
capacitors. Because of this
the
output
stages remain absolutely stable
even
under
loads
of
2 Ohms.
The
dual-mono supply ensures optimal channel separation and a stable
tone,
even when powerful musical passages
are
encountered.
The
prestage
is
supplied from a third
power
supply with 2 x 4.700
~F
filters.This has
the
effect
that
the
input
stages can
operate
without
interference from
the
previously
emitted
amplifier
power
and forms
the
basis for
the
enduring peaceful, well-defined
tone
of
the
A2.
THE
INPUT
AMPLIFIER
During
the
development
of
the
input circuitry
we
paid
great
attention
to
extreme
speed, accuracy and low
noise.
The
high
level inputs
of
the
A2
fit
all
signal
sources
with regard
to
impedance and sensitivity.
Additionally input sensitivity can be comfortably adjusted
to
suit
the
requirements.
The inputAUX
I was con-
ceived
as
a
high
level
input
to
which
sources
with exceptionally
high
output
voltage would be
connected.
Relays
are
situated directly behind
the
input sockets.
These
serve
to
switch
the
signal, selected with
either
the
rotary
switch
or
the
remote
control,
to
the
input buffer amplifier.
The
incoming musical
Signal
is
of low
impedance and
thereby
immune
to
interference and cross-talk.
Balance, volume and input sensitivity are adjusted individually
to
the
right and left channels
by
digital
level
con-
trollers.These
work
in
0.5dB steps with
an
adjustment accuracy
of
0.05dB
over
the
complete
range.The result
is
that
the
image remains stable and accurate even
at
low volume.
The
compactness of
the
circuitry allows a
fast and exact processing of
the
musical
Signal,
presenting no
target
to
humming and scattering.
19
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